WO2019182175A1

WO2019182175A1 - Cylinder display displaying method in which 3d space distortion correction method and 2d image correction method are combined

Info

Publication number: WO2019182175A1
Application number: PCT/KR2018/003294
Authority: WO
Inventors: 권재현
Original assignee: (주)올림플래닛
Priority date: 2018-03-21
Filing date: 2018-03-21
Publication date: 2019-09-26

Abstract

The present invention relates to a cylinder display displaying method in which a 3D space distortion correction method and a 2D image correction method are combined, and according to one embodiment of the present invention, the cylinder display displaying method comprises the steps of: determining the size of a space to be used for a distortion correction, on the basis of the actual output size of content to be provided to a cylinder display; correcting space distortion of the content by applying a mathematical formula for the distortion correction; and displaying the content for which the space distortion has been corrected, wherein the space distortion correction can further comprise a discretization step and a normalization step with respect to the mathematical formula for the distortion correction.

Description

Cylinder display display method combining 3D spatial distortion correction method and 2D image correction method

The present invention relates to a cylinder display display method combining a 3D spatial distortion correction method and a 2D image correction method. More specifically, the present invention relates to a spatial distortion correction method for correcting an influence caused by hardware curvature distortion of a cylinder applied to an output or content displayed on a cylinder display, and a cylinder display display method using the same.

BACKGROUND With the development of electronic technology, various types of display devices are being developed. In particular, portable display devices such as TVs, PCs, laptop computers, tablet computers, mobile phones, and MP3 players are widely used. Recently, in order to meet the needs of users who want new and various functions, efforts have been made to develop display devices in newer forms. That's what's called the next-generation display.

An example of the next generation display is a flexible display. The flexible display is a display having a characteristic that can be transformed like a paper, and is a consumer-oriented future display technology that can search and obtain desired information anytime and anywhere.

Such a flexible display may be bent due to the characteristics of the flexible display panel, and may be fixed while being bent to provide visual information at various angles (eg, 360 degrees), for example, to provide visual information at 360 degrees. The flexible display can be referred to as cylinder display or cylinder display.

However, since the cylinder display as described above outputs or displays specific contents at a 360 degree angle, all the contents displayed by the cylinder display are inevitably affected by hardware curvature distortion of the cylinder display, thereby reducing cylinder curvature distortion. It needs to be corrected.

Therefore, a specific method for correcting the cylinder curvature distortion is required.

An object of the present invention is to solve the above problems, an object of the present invention is to provide a spatial distortion correction method for a cylinder display device that can interact in a 360 degree space.

Another object of the present invention is to provide a cylinder display display method combining a 3D spatial distortion correction method and a 2D image correction method.

The cylinder display display method combining the 3D spatial distortion correction method and the 2D image correction method of the present invention for solving the above-described problems, based on the actual output size of the content provided on the cylinder display, determines the size of the space to be used for distortion correction And performing a spatial distortion correction on the content by applying a formula for distortion correction and displaying the content on which the spatial distortion correction is applied on the cylinder display, wherein the spatial distortion correction includes the distortion. It may further comprise a discretization step and a normalization step for the equation for correction.

According to the present invention as described above it can be obtained the effect described below. However, effects obtained through the present invention are not limited thereto.

First, according to the present invention, a spatial distortion correction system and method for a cylinder display can be proposed.

Second, according to the present invention, a cylinder display display method combining a 3D spatial distortion correction method and a 2D image correction method may be provided.

Third, according to the present invention, it may be possible to display content converted to an appropriate size according to the size of the cylinder display device.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

1 to 6 are views for explaining the difference between the cylinder display and the flat panel display according to an embodiment of the present invention.

7 to 9 are views for explaining the difference according to the size of the cylinder display according to an embodiment of the present invention

10 is a diagram for describing a distortion problem that may occur in content displayed on a cylinder display.

FIG. 11 illustrates a definition of a region size to be used for distortion correction according to an embodiment of the present invention. FIG.

12 is a view for explaining a process of deriving a curvature distortion correction formula for applying a spatial distortion correction method for a cylinder display according to an embodiment of the present invention.

FIG. 13 is a diagram illustrating a discretization process for applying a spatial distortion correction method for a cylinder display according to an embodiment of the present invention.

14 is a diagram illustrating a normalization process for applying a spatial distortion correction method for a cylinder display according to an embodiment of the present invention.

FIG. 15 is a diagram for describing a result of applying a spatial distortion correction method for a cylinder display according to an exemplary embodiment of the present invention. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

The present embodiments are merely provided to complete the disclosure of the present invention and to fully inform the scope of the invention to those skilled in the art, and the present invention is defined by the scope of the claims. It is only.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

Throughout the specification, when a part is said to "comprising" (or including) a component, this means that it may further include other components, except to exclude other components unless specifically stated otherwise. do.

In addition, the term "… unit" described in the specification means a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software. Furthermore, "a" or "an", "one", and the like shall be, in the context of describing the present invention, both singular and plural unless the context clearly dictates otherwise or is clearly contradicted by the context. It can be used as a meaning including.

In addition, specific terms used in the embodiments of the present invention are provided to aid the understanding of the present invention, and unless otherwise defined, all terms used herein, including technical or scientific terms, are used to describe the present invention. It has the same meaning as commonly understood by one of ordinary skill in the art. Use of this specific terminology may be modified in other forms without departing from the spirit of the invention.

In the present invention, a spatial distortion correction method for a cylinder display will be proposed. Accordingly, the difference between the cylinder display and the flat panel display will first be described.

The movement of an object on a flat panel display and the movement of the object on a cylinder display can cause differences in terms of continuity of the visual perception of the observer.

Referring first to FIG. 1, as shown in FIG. 1, (1) when one object moves from position 1 to position 2, i.e., 1/4 of the whole, on a flat panel display, and (2) position on a cylinder display. If you move from 1 'to position 2' by a quarter (90 degrees) of the whole, you can perceive that the object has moved to the right, assuming the observer is at position A.

If the range of movement of the object is small in this way (for example, less than a quarter of the whole or less than 90 degrees, etc.), the movement of the object on the flat panel display and the cylinder display is viewed from an observer's point of view. You may not notice any difference between the movements of your objects.

However, when the movement of the object is increased, that is, when the range of movement of the object is large (for example, a range over 1/4 of the whole or a range of 90 degrees or more), the flat display is viewed from the observer's point of view. The motion of the object and the motion of the object on the cylinder display may be perceived as different movements.

As a more specific example, when a particular object moves by at least a quarter of the whole from position 3 to position 4 on the flat panel display and on the cylinder display the specific object moves from position 3 'to position 4' Assuming that the observer is in position B as a case of moving by two degrees (180 degrees), the user (or observer) can visually perceive the motion of the object on the flat panel display as On the cylinder display, it is recognized that the object has moved to the opposite side, and after a certain point of time, a deviation occurs from the observer's perspective.

In addition, when the movement of the object becomes larger on the cylinder display, it may return to the observer's visual range again. For example, if an object moves from position 4 'to position 3', the user (or observer) at position B may re-perceive the particular object that was just out of sight.

As shown in FIG. 2, unlike a flat panel display, a cylinder display device may be observed 360 degrees, and as a result, a phenomenon in which only a part of the cylinder display may be perceived may occur according to a viewer's position. have.

That is, the observer can perceive different contents depending on which of the positions A, B, C, and D is looking at the cylinder display. That is, if the observer is at position A and at position B, there may be overlapping content, and the content of the area close to position D at position A is not recognized at observer's position B, and position C at position B The contents of the area close to are not recognized at the viewer's position A.

In order to express the characteristics of such a cylinder display, various contents production methods have been studied. As shown in FIG. 3, in the case of a cylinder display, an example of utilizing content on the advertisement poster may not have visual continuity.

Therefore, the cylinder display as described above or a display method using the same, due to its inherent characteristics, double distortion may occur, and mainly when the computer graphic (CG) output on the flat panel display on the cylinder display Distortion may occur.

Referring to FIG. 5, as shown in FIG. 5, unlike one object that may move up, down, left, and right on a flat panel display, a specific object may be rotated on a cylinder curved surface as well as up, down, left, and right on a cylinder display. In, a difference may occur between the CG output and the final perceived outcome with the observation.

In addition, as shown in FIG. 6, a difference may occur between the flat panel display and the cylinder display even in the representation of depth. In the flat display on the left side of FIG. 6, as the expression of depth, infinite expression (directing) is possible inside the screen, which can be regarded as the vanishing point, whereas in the cylinder display, the depth is limited to the diameter (diameter) to form a real sense of space. There is a characteristic.

7 to 9 are views for explaining the difference according to the size of the cylinder display according to an embodiment of the present invention.

Referring to FIG. 7, as shown in FIG. 7, on the flat panel display, the entire CG output falls within the observer's field of view, while on the cylinder display, the limitation of not being able to see the entire 360 degree field of view at a glance May occur. According to a related study, only about 44% of viewers see a flat panel display.

The size of the cylinder display also varies the viewer's visual perception. As shown in FIG. 8, even if an object of the same size is output on the cylinder display, all of the objects can be visually recognized in the A cylinder display, which is relatively larger than B, and in the B cylinder display, a part of the object is in the visual range. You can see it coming off.

According to the present invention to be described below, such a feature can be utilized in a method for producing content. As illustrated in FIG. 9, content that is difficult to express on an existing plane may be produced on a cylinder display by utilizing a formative element having a curved shape.

Referring to FIG. 10, when the flat display is bent in the form of a cylinder, a problem occurs in the direction that the user views. More specifically, as shown in the graph on the right side of FIG. 10, the original screen has a large length, and when the output is made in accordance with the cylinder display, the screen width is reduced due to the space distortion of the cylinder display. Therefore, screen distortion may occur when viewed by the user.

That is, the image of the wide area is displayed in the narrow area, and accordingly, it is necessary to increase the image of the screen and convert the image of the image to be enough to be seen in the narrow area.

Referring to FIG. 11, the size of an area to be used for distortion correction is defined using the resolution of a cylinder display to be actually used. For example, if the resolution of the cylinder display is 1280 * 960, the circumference of the circle in FIG. 11 is 1280 pixels, and the length of the required radius, that is, the original screen length, is 640 pixels. In this case, since the reduced screen length is equal to the diameter of the circle, it may be referred to as about 407 pixels. For convenience of calculation, the screen length is defined as 400 pixels.

Therefore, since the area that the user can actually see is 400 pixels, the area of 400 pixels needs to be extended by 240 pixels to the area of 640 pixels occupying the cylinder display. Therefore, there is a need for a spatial distortion correction system and method for a cylinder display according to an embodiment of the present invention.

Referring to FIG. 12, an enlargement formula for distortion correction generated by modifying a circle equation is shown. In each graph illustrated in FIG. 12, an axis means a front pixel, and when the front center is viewed as 0, the left end region is -200 and the right end region is 200.

In this case, referring to the rightmost graph of FIG. 12, it can be seen that the y-intercept was moved by r to adjust the y-axis to 0 when the original equation was taken by y ≤ 0 and the x-axis was 0. .

In order to apply the equation defined in FIG. 12, a discretization process as shown in FIG. 13 is required. For this purpose, an enlargement amount may be defined for each bin by setting bins in an interval of 400 pixels.

In the present invention, 40 bins having a horizontal length of 5 pixels are used, and the graph shown on the right side of FIG. 13 shows an enlarged histogram of 40 bins.

In order to apply the result of discretization in FIG. 13, a process of normalizing the discretization value is required. More specifically, the normalization process may refer to an operation of setting the total sum of the discretized histograms to 240 because the total 240 pixels must be increased to increase the 400 pixels to 640 pixels. In Fig. 14, the sum is normalized to 240 so that the maximum value is about 25.

Referring to FIG. 15, a result of applying a spatial distortion correction method for a cylinder display according to an embodiment of the present invention is shown. When viewed as a planar image, the content looks stretched, but when the corresponding content is mapped to the cylinder, the planar image may be compared with the uncorrected image.

The various operations and embodiments described herein above can be implemented in combination with one or more of these, including the structures disclosed herein and their structural equivalents.

The description set forth in this specification presents the best mode of the invention, and provides examples to illustrate the invention and to enable one skilled in the art to make and use the invention. The specification thus produced is not intended to limit the invention to the specific terms presented.

Thus, although the present invention has been described in detail with reference to the above examples, those skilled in the art can make modifications, changes and variations to the examples without departing from the scope of the invention. In short, in order to achieve the intended effect of the present invention, it is not necessary to separately include all the functional blocks shown in the drawings or to follow all the orders shown in the drawings in the order shown; Note that it may fall within the scope.

The cylinder display display method combining the present inventors 3D spatial distortion correction method and 2D image correction method can be applied to various cylinder display display methods.

Claims

In the cylinder display display method combining the 3D spatial distortion correction method and the 2D image correction method,

Determining the size of the space to be used for distortion correction based on the actual output size of the content provided on the cylinder display;

Performing spatial distortion correction on the content by applying a formula for distortion correction; And

Displaying the content on which the spatial distortion correction has been performed;

And the spatial distortion correction further comprises a discretization step and a normalization step with respect to the equation for distortion correction.
The method of claim 1,

And when the type of the classified content is small content, the content is generated for one user, and the content is responsive to the first user.
The method of claim 1,

And the space size to be used for the distortion correction is determined by subtracting a circle diameter value of the display from a circumferential radius value of the cylinder display.
The method of claim 1,

The equation for distortion correction is a circle equation (
), We shifted the value of the y intercept by r,

The cylinder display display method characterized by the above-mentioned.
The method of claim 1,

The discretization step of the equation for distortion correction, characterized in that for displaying each pixel of the content as a histogram, and to define the enlargement amount for the component corresponding to each of the fill cells, the cylinder display display method.
The method of claim 5,

The normalization step of the equation for distortion correction, characterized in that for controlling the total sum of the components corresponding to each of the fill cells in the histogram on which the enlargement amount definition is performed, to correspond to the area size to be used for the distortion correction, How to display the cylinder display.
A cylinder display capable of displaying content;

A sensor unit detecting a user input;

Communication unit for performing communication with other devices; And

Including a control unit for controlling each configuration,

The control unit,

Based on the actual output size of the content provided on the cylinder display, the size of the space to be used for distortion correction is determined, and the space distortion correction for the content is performed by applying a formula for distortion correction, wherein the space distortion correction And performing discretization and normalization on the equation for distortion correction when performed.