CN117522756A - Image display method, device, equipment and storage medium - Google Patents
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Abstract
The invention relates to the technical field of display, and discloses an image display method, device, equipment and storage medium, wherein the method comprises the following steps: acquiring an input image to be displayed on an OLED display panel, and determining a power consumption parameter of the input image; determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image; converting the candidate image into a Lab color space, and calculating color difference between the input image and the candidate image in the Lab color space; and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel. According to the invention, the candidate image is selected from the low-power-consumption images, and then the image to be displayed is displayed on the OLED display panel according to the color difference between the input image and the candidate image, so that the power consumption is reduced, the quality of the displayed image is ensured, and the look and feel of a user is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an image display method, apparatus, device, and storage medium.
Background
Organic Light-Emitting Diode (OLED) is widely used in intelligent mobile terminals due to its high image quality and low power consumption and cost. And the energy consumption of the screen display part of the intelligent mobile terminal, namely the energy consumption of the OLED display screen is the main part of the energy consumption of the whole intelligent mobile terminal equipment.
At present, in order to reduce the power consumption of an OLED display screen, the power consumption of the OLED display screen is reduced by reducing the power consumption of the RGB pixel points of an image, and the reduction of the values of the RGB pixel points of the image can influence the quality of the finally displayed image.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide an image display method, an image display device, image display equipment and a storage medium, and aims to solve the technical problems that the quality of a final display image cannot be ensured when power consumption is reduced in the prior art, and the image quality is poor after the power consumption is reduced.
To achieve the above object, the present invention provides an image display method comprising the steps of:
Acquiring an input image required to be displayed on an OLED display panel, and determining a power consumption parameter of the input image;
determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image;
converting the candidate image into a Lab color space, and calculating color differences between the input image and the candidate image in the Lab color space;
and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel.
Optionally, the power consumption parameter includes brightness and saturation, the preset power consumption parameter is a preset brightness threshold, and the step of determining a low-power consumption image of the input image under the condition that the power consumption parameter is lower than the preset power consumption parameter and selecting a candidate image from the low-power consumption image includes:
converting the input image into an HSV color space to obtain initial HSV data;
acquiring a first image of which the brightness of the input image changes within a range lower than the preset brightness threshold value in the HSV color space according to the initial HSV data, and taking the first image as a low-power-consumption image;
And selecting a second image with the saturation larger than a preset saturation threshold from the low-power consumption images, and taking the second image as a candidate image.
Optionally, before the step of converting the input image into HSV color space to obtain initial HSV data, the method further includes:
converting the input image into a Lab color space to obtain initial Lab data;
accordingly, the step of converting the candidate image into a Lab color space and calculating a color difference between the input image and the candidate image in the Lab color space includes:
converting the input image into a Lab color space to obtain initial Lab data;
converting the candidate image into the Lab color space to obtain candidate Lab data;
calculating the deviation between the initial Lab data and each candidate Lab data in the Lab color space, and taking the deviation as the color difference between the input image and the candidate image.
Optionally, the step of determining a target display image to be displayed from the candidate images according to the color difference includes:
judging whether target Lab data with deviation as target deviation exists in the candidate Lab data;
And if the target Lab data exist, selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
Optionally, after the step of determining whether the target Lab data with the deviation being the target deviation exists in the candidate Lab data, the method further includes:
if the target Lab data do not exist, calculating the approaching degree of each deviation and the target deviation, and selecting target Lab data with the approaching degree reaching a preset degree from the candidate Lab data;
and selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
Optionally, the step of displaying the target display image on the OLED display panel includes:
converting the target display image into an RGB color space to obtain sub-pixel gray scale information of the target display image;
and displaying the target display image on the OLED display panel according to the sub-pixel gray level information.
Optionally, the step of displaying the target display image on the OLED display panel according to the subpixel gray-scale information includes:
Acquiring target current parameter information corresponding to the sub-pixel gray-scale information from a preset mapping table, wherein the preset table records the corresponding relation between the sub-pixel gray-scale information and the current parameter information;
and generating a driving signal according to the target current parameter information, and inputting the driving signal to the OLED display panel so that the OLED display panel displays the target display image.
In addition, in order to achieve the above object, the present invention also proposes an image display apparatus including:
the image acquisition module is used for acquiring an input image required to be displayed on the OLED display panel and determining the power consumption parameter of the input image;
the image selection module is used for determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image;
a color difference calculation module for converting the candidate image into a Lab color space and calculating a color difference between the input image and the candidate image in the Lab color space;
and the image display module is used for determining a target display image to be displayed from the candidate images according to the chromatic aberration and displaying the target display image on the OLED display panel.
In addition, in order to achieve the above object, the present invention also proposes an image display apparatus including: a memory, a processor and an image display program stored on the memory and executable on the processor, the image display program being configured to implement the steps of the image display method as described above.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon an image display program which, when executed by a processor, implements the steps of the image display method as described above.
The invention has improved a image display method, apparatus and storage medium, this method is through obtaining the input image that needs to be displayed on OLED display panel, and confirm the power consumption parameter of the input image; determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image; converting the candidate image into a Lab color space, and calculating color difference between the input image and the candidate image in the Lab color space; and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel. According to the invention, the candidate image is selected from the low-power-consumption images, and then the image to be displayed is displayed on the OLED display panel according to the color difference between the input image and the candidate image, compared with the prior art that the power consumption of the OLED display screen is reduced by reducing the power consumption of the RGB pixel points of the image, the problem that the image quality is poor after the power consumption is reduced is solved, the power consumption is reduced, the quality of the displayed image is ensured, and the user's look and feel is effectively improved.
Drawings
FIG. 1 is a schematic diagram of an image display device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of an image display method according to the present invention;
FIG. 3 is a schematic diagram of the basic structure of an OLED according to a first embodiment of the image display method of the present invention;
FIG. 4 is a schematic diagram of RGB color space according to a first embodiment of the image display method of the present invention;
FIG. 5 is a schematic view of HSV color space in a first embodiment of an image display method according to the present invention;
FIG. 6 is a flowchart of a second embodiment of an image display method according to the present invention;
FIG. 7 is a diagram showing Lab color space in a second embodiment of the image display method of the present invention;
FIG. 8 is a plot of color difference subareas in Lab color space for a second embodiment of an image display method of the present invention;
FIG. 9 is a flowchart of a third embodiment of an image display method according to the present invention;
FIG. 10 is a schematic diagram of driving currents corresponding to gray scales of different sub-pixels according to a third embodiment of the image display method of the present invention;
FIG. 11 is a block diagram of a system for reducing power consumption of an OLED display screen according to a third embodiment of the image display method of the present invention;
FIG. 12 is a flowchart showing a power consumption reduction of an OLED display screen according to a third embodiment of the image display method of the present invention;
Fig. 13 is a block diagram showing the structure of a first embodiment of the image display device of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of an image display device of a hardware running environment according to an embodiment of the present invention.
As shown in fig. 1, the image display apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the image display apparatus, and may include more or less components than illustrated, or may combine certain components, or may be arranged in different components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and an image display program may be included in the memory 1005 as one type of storage medium.
In the image display apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the image display apparatus of the present invention may be provided in an image display apparatus that calls an image display program stored in the memory 1005 through the processor 1001 and executes the image display method provided by the embodiment of the present invention.
An embodiment of the present invention provides an image display method, referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the image display method of the present invention.
In this embodiment, the image display method includes the steps of:
step S10: and acquiring an input image required to be displayed on the OLED display panel, and determining the power consumption parameter of the input image.
It should be noted that, the execution body of the method of the embodiment may be a computing service device with functions of image display, network communication and program running, for example, a mobile phone, a tablet computer, a personal computer, etc., and may also be other electronic devices that implement the same or similar functions. This embodiment and the following embodiments will be described below with reference to the above-described image display apparatus (simply referred to as display apparatus).
It is understood that the above-mentioned OLED display panel is composed of many tiny organic light emitting diodes, and is capable of generating an image by current-activated organic material luminescence. In contrast to the liquid crystal display panel, the OLED does not use a backlight, has a self-luminous property, and each pixel assembly for displaying an image can be independently driven. Different from the liquid crystal display panel, the energy consumption is reduced by reducing the light source intensity, and the OLED realizes energy saving by adjusting the brightness and the color intensity of the display content. As shown in fig. 3, fig. 3 is a schematic diagram showing the basic architecture of an OLED according to a first embodiment of the image display method of the present invention, and the OLED structure commonly used at present adopts a three-layer electrode interlayer structure including an Electron Transport Layer (ETL), an organic light emitting layer (ELL) and a Hole Transport Layer (HTL) formed by a power supply, a cathode (metal), a glass substrate and a three-layer electrode interlayer structure; three modes for realizing full-color display injection flow use are provided: independent luminescent material method, light color conversion method and color filter film method. Further, since the OLED display does not need a backlight source for lighting display, and the injection, migration and recombination processes of carriers are induced by the action of an external electric field, so that exciton machine migration luminescence and release energy are generated, the power consumption of the OLED display for generating luminescence is directly proportional to the intensity of luminescence. The main way to reduce the power consumption is to reduce the pixel intensity of the display image, and Gamma correction is widely used in modern display systems to change the power consumption, but the display power consumption is reduced simply by reducing the pixel intensity, which affects the image quality, so this embodiment is proposed.
It should be noted that the above power consumption parameter may be a parameter that affects the power consumption of the OLED display panel, such as brightness, and is related to the input image.
In a specific implementation, the display device may receive an input image input by a signal source and to be displayed on the OLED display panel, and determine a power consumption parameter related to the input image and affecting power consumption of the OLED display panel.
Step S20: and determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image.
It should be noted that, the preset power consumption parameter is a parameter for determining that the power consumption parameter is too large, so that larger power consumption is generated when the OLED display panel displays an image. If the power consumption parameter is lower than the preset power consumption parameter, the power consumption of the OLED display panel is determined to be low when the power consumption parameter corresponds to the image display, and conversely, if the power consumption parameter is greater than or equal to the preset power consumption parameter, the power consumption of the OLED display panel is determined to be higher when the power consumption parameter corresponds to the image display.
It can be understood that the low-power-consumption image may be an image with a power consumption parameter lower than a preset power consumption parameter, and the OLED display panel has lower power consumption when displaying.
The candidate image is an image set including a final display image.
In a specific implementation, in order to reduce the power consumption of the OLED display panel, the display device may adjust the power consumption parameter of the input image at a fixed frequency within a range lower than a preset power consumption parameter, and acquire images under different power consumption parameters. Further, if the low-power-consumption image is directly displayed, there may be a case where a part of the low-power-consumption image is poor in quality, and thus, a candidate image may be selected from the low-power-consumption image based on the perception of the image by the human eye.
It should be appreciated that the perception of an image by the human eye may be represented by a predetermined quality parameter range, i.e., if the quality parameter of the image is within the predetermined quality parameter range, it may be determined that the perception of the image by the human eye is better. Therefore, an image whose quality parameter is within a preset quality parameter range is selected as a candidate image from the above-described low-power consumption image. The quality parameter may be a parameter related to the image display quality, such as saturation.
Step S30: the candidate image is converted into a Lab color space, and a color difference between the input image and the candidate image is calculated in the Lab color space.
The color difference is an index for indicating the degree of difference between the colors of the two images. It measures the offset or difference of one color relative to another in the color space.
It will be appreciated that, as shown in fig. 4, fig. 4 is a schematic diagram of RGB color space in the first embodiment of the image display method according to the present invention, where RGB color space is the most basic board-oriented and most used color space in hardware, that is, three channels represent an image, red R (255, 0), green G (0, 255) and blue B (0, 255), respectively, and the display panel may represent any color by using a linear combination of the three color channels, but has a certain limitation in image processing, and since any color is related to the three components and is highly relevant, it is not intuitive to continuously change colors, and it is difficult to change the three components of RGB color space closely related to brightness, that is, as long as brightness changes, the three components change accordingly, so that for a certain color, it is difficult to accurately represent three components of red, which are most sensitive to the color, and the most sensitive to the blue color is not suitable for the system, and the most sensitive to the blue color is not suitable for the image processing, and the most sensitive to the system is not suitable for displaying the color.
Further, the current power consumption reduction method is applied to the RGB color space, and in order to calculate power independent of an external policy tool, a pixel-level OLED model is adopted, and the calculation formula is as follows:
wherein P is total Power is consumed for the total pixels, n is the total number of pixels, R i 、G i 、B i R, G, B components of the ith pixel in the display content, and the index Gamma is Gamma correction value and coefficient w of the display content in the standard RGB color space r 、w g 、w b As can be seen from the energy efficiency coefficients of the three primary colors R, G, B, if the power consumption of the OLED display panel is reduced, the power consumption of the RGB pixels of the image is reduced, but as the RGB pixel values are reduced, the final display quality of the image is inevitably affected, so that the power consumption of the OLED display panel cannot be reduced and the final display quality of the image cannot be ensured, and therefore, in order to overcome the problem, the embodiment adopts the Lab color space.
For ease of understanding, the description is given with reference to fig. 5, but the present solution is not limited thereto. Fig. 5 is a schematic diagram of HSV color space in the first embodiment of the image display method according to the present invention, and in fig. 5, for Lab color space, it is composed of three elements, namely, brightness L and a and b related colors. L represents brightness, the value is-L to +L, +L represents maximum brightness and white, -L represents minimum brightness and black, a represents the range from red to green, the value is-a to +a, +a represents red, -a represents green, b represents the range from yellow to blue, the value is-b to +b, +b represents yellow, and-b represents blue. Any color in nature can be expressed in Lab space, and this color representation describes the human visual perception in a digitized manner (coordinates in space).
In a specific implementation, the display device may convert the candidate image into the Lab color space to obtain a numerical representation of each point of the candidate image in the Lab color space, and simultaneously convert the input image into the Lab color space to obtain a numerical representation of each point of the input image in the Lab color space, and then calculate the color difference between the input image and the image according to the numerical representations of the candidate image and the input image in the Lab color space, respectively. By the color difference delta E ab I.e. the perceived gap of the human eye to the color of the object, e.g. ΔE ab When the value range is 0-1, the naked eyes can not distinguish chromatic aberration; ΔE ab When the value range is 1-2, the naked eyes can slightly perceive the chromatic aberration; ΔE ab When the value range is 2-3, the naked eyes can clearly distinguish the chromatic aberration; ΔE ab When the value range is 3-5, the naked eyes can perceive very obvious chromatic aberration; ΔE ab When the value is larger than 5, the naked eyes can perceive very large color difference, and even look like two colors.
Step S40: and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel.
In a specific implementation, the display device may select a standard color difference value with good visual effect, such as Δe, from the range of values of the color differences ab =2, then determining a target display image having a color difference of the standard color difference value or close to the standard color difference value from the candidate images, and transmitting related data of the target display image to the OLED display panel to cause the OLED display target to display the target display image. The candidate images selected before the color difference is calculated are images with low power consumption, so that real-time reduction of display power consumption is considered, taste identification of the original image and the image with reduced power consumption by human eyes is considered, power consumption reduction and high-taste display are considered, and the problem of reduction of display image quality caused by power consumption reduction is avoided.
According to the embodiment, an input image required to be displayed on an OLED display panel is obtained, and the power consumption parameter of the input image is determined; determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image; converting the candidate image into a Lab color space, and calculating color difference between the input image and the candidate image in the Lab color space; and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel. According to the embodiment, the candidate image is selected from the low-power-consumption images, and then the image to be displayed is displayed on the OLED display panel according to the color difference between the input image and the candidate image, compared with the prior art that the power consumption of the OLED display screen is reduced by reducing the power consumption of the RGB pixel points of the image, the problem that the image quality is poor after the power consumption is reduced is solved, the quality of the displayed image can be guaranteed while the power consumption is reduced, and the user's look and feel is effectively improved.
Referring to fig. 6, fig. 6 is a flowchart illustrating a second embodiment of an image display method according to the present invention.
Based on the first embodiment, in this embodiment, the power consumption parameter includes brightness and saturation, the preset power consumption parameter is a preset brightness threshold, and the step S20 includes:
step S201: the input image is converted into HSV color space to obtain initial HSV data.
For ease of understanding, the description is given with reference to fig. 7, but the present solution is not limited thereto. Fig. 7 is a schematic diagram of Lab color space in a second embodiment of the image display method of the present invention, in fig. 7, hue (H) is Hue, saturation (S) is Saturation, value (V) is brightness, a cross section can be regarded as a polar coordinate system, H is represented by polar angle of polar coordinates, S is represented by polar axis length of polar coordinates, and V is represented by height of axis. Rotation in a counter-clockwise direction from red may in turn represent red, yellow, green, cyan, blue, magenta, red, whereby all colors can be represented by this polar coordinate, h=0° for red, h=120° for green, and h=240° for blue. The horizontal direction represents the saturation S, the saturation value range is 0-100%, the saturation is 0, the saturation is pure white, and the color is saturated more when the value is larger. The vertical direction represents the brightness V, which determines the brightness of the color in the color space, the brightness range is 0-100%, brightness 0.0 represents pure black (at this time, the color is darkest), brightness 1.0 represents white, and the higher the brightness, the brighter the color. The HSV color space is closer to the perception of human eyes to colors than RGB, and the three physical quantities are independent of each other, namely, the hue value is processed independently, brightness and saturation are not affected, or brightness and saturation are changed independently, and colors are not affected, so that the embodiment adopts the HSV color space to extract a low-power-consumption image.
In a specific implementation, the display device may convert the input image into an HSV color space, obtain a hue component, a saturation component, and a brightness component of each point in the input image in the HSV color space, and use the hue component, the saturation component, and the brightness component of each point as initial HSV data.
Step S202: and acquiring a first image of which the brightness of the input image is changed within a range lower than the preset brightness threshold value in the HSV color space according to the initial HSV data, and taking the first image as a low-power-consumption image.
The preset luminance threshold may be a luminance threshold for determining that the luminance is high, so that the power consumption of the OLED display panel is increased. That is, if the brightness of the image is greater than the preset brightness threshold, it may be determined that the image is brighter, which increases the power consumption of the OLED display panel, and correspondingly, if the brightness of the image is lower than the preset brightness threshold, it may be determined that the image is moderate or darker, which does not increase the power consumption of the OLED display panel.
In a specific implementation, the above display device may change the saturation and brightness of the input image in the HSV space with a 100% change rate based on the initial HSV data, so as to obtain images with different saturation and brightness, where the change of the brightness and saturation means the change of the output power consumption of R, G, B sub-pixels, so that different pictures represent different power consumption, and therefore, the saturation and brightness in the HSV space can be used as the power consumption parameter, and accordingly, the preset brightness threshold can be used as the preset power consumption parameter. The display device may first acquire all the first images with the brightness lower than the preset brightness threshold value, and may use the first images as the low-power-consumption images because the brightness of the first images is lower than the preset brightness threshold value.
Step S203: and selecting a second image with the saturation larger than a preset saturation threshold from the low-power consumption images, and taking the second image as a candidate image.
It should be noted that the preset saturation threshold may be a threshold for determining whether the image is highly saturated, that is, if the saturation of the image is greater than the saturation threshold, the image may be determined to be highly saturated, and correspondingly, if the saturation of the image is lower than the saturation threshold, the image may be determined to be lowly saturated.
In a specific implementation, besides reducing the power consumption of the OLED display panel, the image quality is considered, and since the saturation represents the degree of one color relative to the gray scale, a higher saturation means that the color is more vivid and bright, and a lower saturation is closer to gray, so that the saturation can be used as a quality parameter related to the image display quality. The display device can select all second images with saturation larger than the preset saturation threshold from the low-power consumption images, and the second images are high-saturation images because the brightness of the second images is higher than the preset saturation threshold, so that the second images have good image quality and can be used as candidate images.
The present embodiment obtains initial HSV data by converting an input image into an HSV color space; acquiring a first image of which the brightness of an input image changes within a range lower than a preset brightness threshold value in an HSV color space according to initial HSV data, and taking the first image as a low-power-consumption image; and selecting a second image with the saturation larger than a preset saturation threshold from the low-power-consumption images, and taking the second image as a candidate image. According to the method, the first image with the brightness lower than the preset brightness threshold is selected as the low-power-consumption image, and then the second image with the saturation higher than the preset saturation threshold is selected from the low-power-consumption images as the candidate image, so that the candidate image has low power consumption and high saturated image quality, and the precision of selecting the candidate image is effectively improved.
Further, in this embodiment, before step S201, the method further includes:
the input image is converted into HSV color space to obtain initial HSV data.
In a specific implementation, in order to calculate the color difference between the input image and the candidate image in the Lab color space, the display device may convert the input image into the Lab color space, obtain the L component, the a component, and the b component of each point in the input image in the Lab color space, and use the L component, the a component, and the b component of each point in the input image as the initial HSV data.
Accordingly, the step S30 includes:
step S301: and converting the candidate image into the Lab color space to obtain candidate Lab data.
In a specific implementation, in order to calculate the color difference between the input image and the candidate image in the Lab color space, the display device may convert the candidate image into the Lab color space, obtain the L component, the a component, and the b component of each point in the candidate image in the Lab color space, and use the L component, the a component, and the b component of each point in the candidate image as the candidate HSV data.
Step S302: calculating the deviation between the initial Lab data and each candidate Lab data in the Lab color space, and taking the deviation as the color difference between the input image and the candidate image.
In a specific implementation, the display device may calculate the deviation between the initial Lab data and each candidate Lab data by using a preset deviation formula, that is, calculate the deviation between the L component, the a component, and the b component and the L component, the a component, and the b component in each candidate Lab data, and use the calculated deviation as the color difference between the input image and the candidate image. The preset deviation formula is as follows:
wherein DeltaE is ab For the deviation of the initial Lab data and the candidate Lab data, ΔL is the L component in the initial Lab data and the candidate LThe difference between the L component in the ab data, Δa, is the difference between the a component in the initial Lab data and the a component in the candidate Lab data, and Δb is the difference between the b component in the initial Lab data and the b component in the candidate Lab data.
Further, in this embodiment, the step of determining the target display image to be displayed from the candidate images according to the color difference includes:
step S41: and judging whether target Lab data with the deviation being the target deviation exists in the candidate Lab data.
It should be noted that, the target deviation is a standard deviation value selected in advance and having a better visual effect, for example, the standard deviation is 2. That is, if the deviation is the standard deviation, it can be determined that the color difference between the candidate image and the input image at that time is optimal, and accordingly, if the deviation is not the standard deviation and is close to the standard deviation, it can be determined that the color difference between the candidate image and the input image at that time is optimal, and if the deviation is not the standard deviation and is far from the standard deviation, it can be determined that the color difference between the candidate image and the input image at that time is poor.
In a specific implementation, the display device may acquire a pre-selected or preset target deviation, and then compare each calculated deviation with the target deviation to determine whether there is target Lab data with the deviation being the target deviation in each candidate Lab data.
Step S42: and if the target Lab data exist, selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
In a specific implementation, when the display device detects that the target Lab data exists in the candidate Lab data, it can determine that the color difference between the image corresponding to the target Lab data and the input image is optimal, the visual effect is best, the target Lab data can be extracted, the target candidate image corresponding to the target Lab data is selected from the candidate images, and the target candidate image is used as the target display image to be displayed.
Further, in this embodiment, after step S41, the method further includes:
step S42': if the target Lab data do not exist, calculating the approaching degree of each deviation and the target deviation, and selecting target Lab data with the approaching degree reaching a preset degree from the candidate Lab data.
The predetermined level may be a level for determining whether the proximity of the deviation to the target deviation is high. That is, if the proximity of the deviation to the target deviation reaches the preset level, it can be determined that the proximity of the deviation to the target deviation is high, whereas if the proximity of the deviation to the target deviation does not reach the preset level, it can be determined that the proximity of the deviation to the target deviation is low.
In a specific implementation, when the display device detects that the target Lab data does not exist in the candidate Lab data, the proximity degree of each deviation and the target deviation can be calculated, and then the target Lab data with the proximity degree reaching the preset degree is selected from the candidate Lab data, namely, the target Lab data with the proximity degree relatively close to the target deviation is selected.
Step S43': and selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
In a specific implementation, as the deviation of the target Lab data is relatively close to the target deviation, the display device can judge that the color difference between the image corresponding to the target Lab data and the input image is better, the visual effect is better, the target Lab data can be extracted according with the requirements, the target candidate image corresponding to the target Lab data is selected from the candidate images, and the target candidate image is used as the target display image to be displayed.
For ease of understanding, the description is given with reference to fig. 8, but the present solution is not limited thereto. Fig. 8 is a color difference partition quadrant graph of a Lab color space in a second embodiment of the image display method of the present invention, in fig. 8, in an HSV color space, images with different power consumption can be obtained by adjusting brightness and saturation, and then each image is divided into four quadrant areas a (first quadrant), B (second quadrant), C (third quadrant) and D (fourth quadrant) according to a coordinate system with saturation S and brightness V, so that each image can be divided by display taste (saturation S) and power consumption magnitude (brightness V). Wherein, the origin (0, 0) is an input image, the A area is divided by brightness 0-1 and saturation 0-1, the B area is divided by brightness-1-0 and saturation 0-1, the C area is divided by brightness-1-0 and saturation-1-0, the D area is divided by brightness 0-1 and saturation-1-0, brightness 0.5 is the midpoint of brightness 0-1, brightness-0.5 is the midpoint of brightness-1-0, saturation 0.5 is the midpoint of saturation 0-1, saturation-0.5 is the midpoint of saturation-1-0. Assuming that the brightness 0 is the preset brightness threshold and the saturation 0 is the preset saturation threshold, the taste characteristics of the image in the area A are high brightness and high saturation, the image power consumption is highest, the taste characteristics of the image in the area B are low brightness and high saturation, the image power consumption is lower, the taste characteristics of the image in the area C are low brightness and low saturation, the image power consumption is lowest, the taste characteristics of the image in the area D are high brightness and low saturation, and the image power consumption is higher. It can be known that the images in the B region and the C region have lower power consumption, and are the low power consumption images, but considering the display taste, the B region image can be used as a candidate image, and considering the perception of human eyes on the image, an image with a color difference of standard color difference (i.e. the standard deviation) or an image with a color difference close to the standard color difference can be selected as a required target display image.
In the embodiment, initial Lab data are obtained by converting an input image into a Lab color space, and candidate Lab data are obtained by converting a candidate image into the Lab color space; and calculating the deviation between the initial Lab data and each candidate Lab data in the Lab color space, and taking the deviation as the color difference between the input image and the candidate image. In the embodiment, when target Lab data with deviation as target deviation exists in the candidate Lab data, a target candidate image corresponding to the target Lab data is selected from the candidate images as a target display image to be displayed, when target Lab data with deviation as target deviation does not exist in the candidate Lab data, the target Lab data with the approach degree reaching the preset degree is selected from the candidate Lab data, and the target candidate image corresponding to the target Lab data is selected from the candidate images as the target display image to be displayed, so that the accuracy of selecting the target display image to be displayed is effectively improved.
Referring to fig. 9, fig. 9 is a flowchart of a third embodiment of an image display method according to the present invention.
Based on the above embodiments, a third embodiment of the image display method of the present invention is proposed.
In this embodiment, the step of displaying the target display image on the OLED display panel includes:
Step S401: and converting the target display image into an RGB color space to obtain sub-pixel gray scale information of the target display image.
In a specific implementation, the display device may convert the target display image into an RGB color space, to obtain R/G/B sub-pixel gray scale information of each point in the target display image.
Step S402: and displaying the target display image on the OLED display panel according to the sub-pixel gray level information.
In a specific implementation, the display device may adjust a driving current of the OLED display target based on a value corresponding to each sub-pixel gray-scale information, so as to display the target display image on the OLED display panel.
Further, in this embodiment, the step S402 includes:
step S4021: target current parameter information corresponding to the sub-pixel gray level information is obtained from a preset mapping table, and the corresponding relation between the sub-pixel gray level information and the current parameter information is recorded in the preset table.
It should be noted that, the preset mapping table may be preset and configured, and a corresponding relationship between gray-scale information of each sub-pixel and current parameter information is recorded, where the current parameter information is the current required for displaying the color corresponding to the gray-scale information of the sub-pixel. The corresponding relation between the gray-scale information of each sub-pixel and the current parameter information can be pre-constructed, namely, corresponding current parameter information is allocated to the gray-scale information of each sub-pixel.
For ease of understanding, the description is given with reference to fig. 10, but the present solution is not limited thereto. Fig. 10 is a schematic diagram of driving currents corresponding to gray scales of different sub-pixels in a third embodiment of the image display method of the present invention, in fig. 10, the abscissa represents sub-pixel gray scale information, and the ordinate represents OLED current, that is, driving current of an OLED display target, and different values of R sub-pixel gray scale information (Red image in the figure), G sub-pixel gray scale information (Green image in the figure), and B sub-pixel gray scale information (Blue image in the figure) are configured with corresponding OLE currents.
In a specific implementation, the display device may acquire the preset mapping table, and then determine, from the preset mapping table, target current parameter information corresponding to each sub-pixel gray-scale information of the target display image.
Step S4022: and generating a driving signal according to the target current parameter information, and inputting the driving signal to the OLED display panel so that the OLED display panel displays the target display image.
In a specific implementation, the display device may generate a driving signal of a corresponding current according to the target current parameter information, then input the driving signal to an OLED display panel, and display the target display image by using the OLED display panel.
For ease of understanding, the description is given with reference to fig. 11, but the present solution is not limited thereto. FIG. 11 is a block diagram of a system for reducing power consumption of an OLED display screen in a third embodiment of an image display method of the present invention, in FIG. 11, an image is input first, the image is decoded and then converted into initial Lab data in Lab color space and initial HSV data in HSV color space, then candidate images of the original image are calculated when the brightness (-100% -0) and saturation (0-100%) of the original image change every 5%, the obtained candidate images are converted into candidate Lab data in Lab color space, and then color difference DeltaE between candidate images with different brightness and saturation and the input image is calculated in Lab color space ab Namely, calculating the deviation between the candidate Lab data and the initial Lab data, and selecting delta E for reducing the power consumption to the greatest extent ab The target Lab data=2, at this time, the target display image corresponding to the target Lab data is the image data after power consumption reduction, and because the R/G/B gray scale of the image corresponds to the driving current, the driving current corresponding to the R/G/B sub-pixel can be searched in the preset mapping table through the R/G/B component of the target display image, and after the driving current is obtained, a corresponding driving signal can be input to the OLED display screen driving data signal to display a corresponding picture. Here, Δeab=2 is an example, and other values may be used in the actual application scenario, which is not limited in this embodiment.
For ease of understanding, the description is given with reference to fig. 12, but the present solution is not limited thereto. Fig. 12 is a flowchart of power consumption reduction of an OLED display screen in a third embodiment of an image display method of the present invention, in fig. 12, an image is input first, the input image is converted into initial Lab data in Lab color space and initial HSV data in HSV color space, the initial Lab data is stored in ROM1, and the initial HSV data is stored in ROM 2; calling initial HSV data in a ROM2 memory, respectively obtaining candidate images with brightness (-100% -0) and saturation (0% -100%) under HSV color space, storing corresponding data of each candidate image into a ROM3 memory, calling the candidate images in the ROM3 memory, converting each candidate image into Lxa x b x color space, obtaining candidate Lab data, and storing each candidate Lab data into a ROM4 memory; the color difference delta Eab between the candidate images with different brightness and saturation and the original image under the Lab color space can be calculated through the initial Lab data stored in the ROM1 and the candidate Lab data stored in the ROM4, and the color difference is stored in a ROM5 memory; determining a target display image meeting the requirements according to the data stored in the ROM5, and converting the target display image into an RGB color space, wherein in order to reduce the output power consumption of the image maximally, selecting the image with delta Eab=2 (the difference from the original image can be slightly perceived by naked eyes) as the target display image when the brightness reduction proportion in the HSV color space is maximum; and acquiring gray scale information of each sub-pixel of R/G/B of the target display image, determining R/G/B driving data of each point of the image through a preset mapping table, when the driving data of each point of the image is input into the OLED display screen, corresponding to driving data signals of the R/G/B sub-pixels, and sending the driving data signals into the OLED display screen to display the corresponding image with reduced power consumption. When different pictures are input, the above process is repeated, thereby realizing the purpose of reducing power consumption in real time according to the display picture.
In the embodiment, the sub-pixel gray scale information of the target display image is obtained by converting the target display image into an RGB color space; and displaying a target display image on the OLED display panel according to the sub-pixel gray-scale information. In the embodiment, target current parameter information corresponding to sub-pixel gray-scale information is obtained from a preset mapping table, and the corresponding relation between the sub-pixel gray-scale information and the current parameter information is recorded in the preset table; and generating a driving signal according to the target current parameter information, and inputting the driving signal to the OLED display panel so that the OLED display panel displays the target display image. According to the embodiment, the target current parameter information corresponding to the sub-pixel gray scale information is obtained from the preset mapping table, the driving signal is generated according to the target current parameter information, the efficiency of driving current generation is effectively improved, and the display efficiency of the target display image is further improved.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores an image display program, and the image display program realizes the steps of the image display method when being executed by a processor.
Referring to fig. 13, fig. 13 is a block diagram showing the structure of a first embodiment of an image display device according to the present invention.
As shown in fig. 13, an image display device according to an embodiment of the present invention includes:
the image acquisition module 501 is configured to acquire an input image to be displayed on the OLED display panel, and determine a power consumption parameter of the input image.
The image selection module 502 is configured to determine a low-power-consumption image of the input image under the power consumption parameter lower than a preset power consumption parameter, and select a candidate image from the low-power-consumption images.
A color difference calculation module 503, configured to convert the candidate image into a Lab color space, and calculate a color difference between the input image and the candidate image in the Lab color space.
And an image display module 504, configured to determine a target display image to be displayed from the candidate images according to the color difference, and display the target display image on the OLED display panel.
According to the embodiment, an input image required to be displayed on an OLED display panel is obtained, and the power consumption parameter of the input image is determined; determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image; converting the candidate image into a Lab color space, and calculating color difference between the input image and the candidate image in the Lab color space; and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel. According to the embodiment, the candidate image is selected from the low-power-consumption images, and then the image to be displayed is displayed on the OLED display panel according to the color difference between the input image and the candidate image, compared with the prior art that the power consumption of the OLED display screen is reduced by reducing the power consumption of the RGB pixel points of the image, the problem that the image quality is poor after the power consumption is reduced is solved, the quality of the displayed image can be guaranteed while the power consumption is reduced, and the user's look and feel is effectively improved.
Based on the above-described first embodiment of the image display device of the present invention, a second embodiment of the image display device of the present invention is proposed.
In this embodiment, the power consumption parameters include brightness and saturation, the preset power consumption parameter is a preset brightness threshold, and the image selecting module 502 is further configured to convert the input image into an HSV color space, so as to obtain initial HSV data; acquiring a first image of which the brightness of the input image changes within a range lower than the preset brightness threshold value in the HSV color space according to the initial HSV data, and taking the first image as a low-power-consumption image; and selecting a second image with the saturation larger than a preset saturation threshold from the low-power consumption images, and taking the second image as a candidate image.
As an implementation manner, the image selection module 502 is further configured to convert the input image into a Lab color space, to obtain initial Lab data; the color difference calculation module 503 is further configured to convert the candidate image into the Lab color space, to obtain candidate Lab data; calculating the deviation between the initial Lab data and each candidate Lab data in the Lab color space, and taking the deviation as the color difference between the input image and the candidate image.
In one embodiment, the image display module 504 is further configured to determine whether there is a target Lab data with a deviation being a target deviation in the candidate Lab data; and if the target Lab data exist, selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
As an embodiment, the image display module 504 is further configured to calculate a proximity degree between each deviation and the target deviation if the target Lab data does not exist, and select target Lab data with a proximity degree reaching a preset degree from the candidate Lab data; and selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
Based on the above-described embodiments of the image display device of the present invention, a third embodiment of the image display device of the present invention is proposed.
In this embodiment, the image display module 504 is further configured to convert the target display image into an RGB color space, to obtain sub-pixel gray-scale information of the target display image; and displaying the target display image on the OLED display panel according to the sub-pixel gray level information.
As an implementation manner, the image display module 504 is further configured to obtain target current parameter information corresponding to the sub-pixel gray-scale information from a preset mapping table, where a corresponding relationship between the sub-pixel gray-scale information and the current parameter information is recorded in the preset mapping table; and generating a driving signal according to the target current parameter information, and inputting the driving signal to the OLED display panel so that the OLED display panel displays the target display image.
The specific implementation manner of the image display device of the present invention may refer to the above method embodiments, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. read-only memory/random-access memory, magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. An image display method, the method comprising:
acquiring an input image required to be displayed on an OLED display panel, and determining a power consumption parameter of the input image;
determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image;
converting the candidate image into a Lab color space, and calculating color differences between the input image and the candidate image in the Lab color space;
and determining a target display image to be displayed from the candidate images according to the chromatic aberration, and displaying the target display image on the OLED display panel.
2. The image display method according to claim 1, wherein the power consumption parameter includes brightness and saturation, the preset power consumption parameter is a preset brightness threshold, and the step of determining a low power consumption image of the input image under the power consumption parameter lower than the preset power consumption parameter and selecting a candidate image from the low power consumption image includes:
converting the input image into an HSV color space to obtain initial HSV data;
acquiring a first image of which the brightness of the input image changes within a range lower than the preset brightness threshold value in the HSV color space according to the initial HSV data, and taking the first image as a low-power-consumption image;
And selecting a second image with the saturation larger than a preset saturation threshold from the low-power consumption images, and taking the second image as a candidate image.
3. The image display method of claim 2, wherein the step of converting the input image into HSV color space to obtain initial HSV data is preceded by the step of:
converting the input image into a Lab color space to obtain initial Lab data;
accordingly, the step of converting the candidate image into a Lab color space and calculating a color difference between the input image and the candidate image in the Lab color space includes:
converting the input image into a Lab color space to obtain initial Lab data;
converting the candidate image into the Lab color space to obtain candidate Lab data;
calculating the deviation between the initial Lab data and each candidate Lab data in the Lab color space, and taking the deviation as the color difference between the input image and the candidate image.
4. The image display method according to claim 3, wherein the step of determining a target display image to be displayed from the candidate images according to the color difference comprises:
Judging whether target Lab data with deviation as target deviation exists in the candidate Lab data;
and if the target Lab data exist, selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
5. The image display method according to claim 4, wherein after the step of determining whether or not there is target Lab data whose deviation is a target deviation in the respective candidate Lab data, further comprising:
if the target Lab data do not exist, calculating the approaching degree of each deviation and the target deviation, and selecting target Lab data with the approaching degree reaching a preset degree from the candidate Lab data;
and selecting a target candidate image corresponding to the target Lab data from the candidate images, and taking the target candidate image as a target display image to be displayed.
6. The image display method according to any one of claims 1 to 5, wherein the step of displaying the target display image on the OLED display panel includes:
converting the target display image into an RGB color space to obtain sub-pixel gray scale information of the target display image;
And displaying the target display image on the OLED display panel according to the sub-pixel gray level information.
7. The image display method according to claim 6, wherein the step of displaying the target display image on the OLED display panel according to the sub-pixel gray scale information comprises:
acquiring target current parameter information corresponding to the sub-pixel gray-scale information from a preset mapping table, wherein the preset table records the corresponding relation between the sub-pixel gray-scale information and the current parameter information;
and generating a driving signal according to the target current parameter information, and inputting the driving signal to the OLED display panel so that the OLED display panel displays the target display image.
8. An image display device, the device comprising:
the image acquisition module is used for acquiring an input image required to be displayed on the OLED display panel and determining the power consumption parameter of the input image;
the image selection module is used for determining a low-power-consumption image of the input image under the condition that the power consumption parameter is lower than a preset power consumption parameter, and selecting a candidate image from the low-power-consumption image;
a color difference calculation module for converting the candidate image into a Lab color space and calculating a color difference between the input image and the candidate image in the Lab color space;
And the image display module is used for determining a target display image to be displayed from the candidate images according to the chromatic aberration and displaying the target display image on the OLED display panel.
9. An image display apparatus, characterized in that the apparatus comprises: a memory, a processor, and an image display program stored on the memory and executable on the processor, the image display program being configured to implement the steps of the image display method as claimed in any one of claims 1 to 7.
10. A storage medium having stored thereon an image display program which, when executed by a processor, implements the steps of the image display method according to any one of claims 1 to 7.
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| CN117198219A (en) * | 2023-11-07 | 2023-12-08 | 惠科股份有限公司 | Display method, device, storage medium and apparatus for display screen |
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