JP2006040056A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device capable of showing a user a content hardly causing motion sickness. <P>SOLUTION: The image display device 1 comprises a content storage means 2 that stores a content, and a content analysis means 3 that takes out the content from the content storage means 2, calculates a motion vector, etc. from the image of the frame contained there, and analyzes the substance of the content. The device also comprises a content selection means 4 that selects a content which hardly causes motion sickness based on the result of analysis by the content analysis means 3, and a content reproduction means 5 that reproduces the content which hardly causes motion sickness selected by the content selection means 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image display device that allows a user to view an image even when riding a vehicle, an aircraft, or a ship, for example.

When viewing a display image, the user may be in a state of poor physical condition. In such a case, as a method of reducing the deterioration of the user's physical condition, in the image display device of the virtual reality (hereinafter referred to as VR) system, the user's subjective report of VR sickness input or the user's physical measurement by the physiological index measurement A method has been proposed that includes a sickness response process that reduces the stimulus intensity of the video in the virtual space presented by the VR system in accordance with the VR sickness determination (see, for example, Patent Document 1).
JP 2000-339490 A (2nd page, FIG. 1)

  However, in the VR sickness reduction method in the conventional image display device, the content that is played back while riding is played regardless of whether the user has a cause of physical condition such as sickness, This is a measure that only reduces the stimulus intensity of the video when there is a report or measurement judgment from the user, so even if the content content is less likely to deteriorate the physical condition, the brightness and sharpness are mechanically You have to continue to look at unsatisfactory images with poor quality because they will be played with reduced, or on the contrary, the stimulation intensity of the image may not be sufficient for those that are very likely to deteriorate the physical condition There was a problem.

  The present invention has been made to solve the above-described conventional problems, and provides an image display device capable of displaying an image while reducing a deterioration in image quality as much as possible so as to reduce a user's physical condition. The purpose is to provide.

  An image display apparatus according to the present invention includes a content storage unit that stores content, a content analysis unit that extracts content from the content storage unit and analyzes the content, and a specification related to the physical condition based on the analysis result of the content analysis unit It has a configuration comprising content selection means for selecting the content of the condition and content reproduction means for reproducing the content selected by the content selection means.

  With this configuration, an image display device having an effect of being able to display an image that is unlikely to be in a poor physical condition by reducing the deterioration of the physical condition of the user while suppressing a decrease in image quality as much as possible while riding. Can be provided.

  The image display device according to the present invention has a configuration in which the content analysis means calculates at least one of the motion vector, brightness, sharpness, contrast, and saturation of an image included in the content, and analyzes the content of the content. is doing.

  With this configuration, it is possible to analyze the contents of content using at least one of motion vectors, brightness, sharpness, contrast, and saturation, and images with little motion on the screen, brightness differences and changes Content that consists of at least one of the following: images with little or no sharpness, little or no change, images with little contrast or little change, images with little difference or saturation, It becomes possible to reduce or prevent the deterioration of the user's physical condition.

  The image display device of the present invention includes content storage means for storing the content analysis result analyzed by the content analysis means in association with the analyzed content, and when the content analysis means analyzes the analyzed content again, The analysis result is read from the storage means.

  This configuration eliminates the need to analyze the same content again, even if it is desired to obtain the analysis result after analyzing the analyzed content once, thereby reducing the analysis time and reducing the computational load on the CPU of the image display device. Can be made.

  The image display device according to the present invention includes physical condition deterioration state reporting means for reporting whether or not the physical condition is in a deteriorated state, and the content selection unit is configured to display the content when the physical condition deterioration state reporting means reports that the physical condition is in a deteriorated state. Based on the analysis result of the analysis means, the content of a specific condition related to the physical condition is selected.

  With this configuration, it is possible to select content that is unlikely to be in a poor physical condition based on the analysis result of the content when the user reports that the user is in a poor physical condition by the physical condition deterioration reporting means. So, when the user is in a poor physical condition, only the content images that can reduce the physical condition can be reduced to reduce the physical condition, and when the user is not in the poor physical condition, all contents are viewed. be able to.

  The image display device of the present invention includes a physical condition deterioration state estimation unit that estimates a physical condition deterioration state, and the content selection unit is based on the analysis result of the content analysis unit and the physical condition deterioration state estimated by the physical condition deterioration state estimation unit. It has the structure which selects the content of the specific condition relevant to this.

  With this configuration, for example, when the user's physical condition is estimated based on the facial expression or viewpoint of the user or biological information such as pulse, breathing, body temperature, sweating, heartbeat, etc. Even if there is no subjective symptom, the condition of worsening physical condition can be predicted more accurately and early, and it is possible to select content that does not easily deteriorate due to the characteristics and personality of the user. Even if a person does not report his / her physical condition, he / she can reduce the deterioration of his / her physical condition by seeing only images of content that can reduce his / her physical condition. You can see all the content when you are not feeling sick.

  The image display device of the present invention includes physical condition deterioration history storage means for storing a history of physical condition deterioration, and environmental condition detection means for detecting environmental conditions, and the content selection means includes the analysis result of the content analysis means and physical condition deterioration. Configuration for selecting content of specific condition related to physical condition based on physical condition deterioration state estimated by estimation means, physical condition deterioration history read from physical condition deterioration history storage means, and environmental condition detected by environmental condition detection means have.

  With this configuration, the user's physical condition deterioration state estimated by the physical condition deterioration estimation unit, the user's physical condition deterioration history read from the physical condition deterioration history storage unit, and the environmental condition detected by the environmental condition detection unit are used. It is possible to select content that does not easily deteriorate, so that the user's physical condition deteriorates by judging the condition of the physical condition more accurately according to the user's sickness characteristics and viewing the image while boarding. Can be reduced.

  The image display apparatus according to the present invention includes a moving body forward situation detection unit that detects a forward situation where the moving body advances in the future, and the content selection unit includes an analysis result of the content analysis unit and a detection result of the moving body forward situation detection unit. The content of the specific condition related to the physical condition is selected based on this.

  With this configuration, for example, it is possible to grasp the road condition in the vehicle traveling direction, such as whether the vehicle is traveling on a highway with few curves or whether it is traveling on a mountain road with many sharp curves and poor paving. Therefore, it is predicted whether the user is likely to be in a state of poor physical condition in the future, and the state of the physical condition is inferior. Since the content can be selected, it is possible to reduce the deterioration of the user's physical condition due to viewing the image while riding.

  The image display device of the present invention has a configuration in which the moving body front situation detecting unit has an imaging unit that captures an image in front of the moving body, and analyzes the situation in front of the moving body based on the image captured by the imaging unit. ing.

  With this configuration, the situation ahead of the moving body can be obtained by analyzing an image captured by the imaging unit.

  The image display device of the present invention has a configuration for detecting a situation in front of a moving body based on the current position of the moving body detected by the navigation system and map information of the navigation system.

  With this configuration, it is possible to obtain the situation in front of the moving body without adding a special device.

  The image display apparatus of the present invention has a configuration in which the content reproduction means is mounted on a moving body.

  With this configuration, it is possible to view content even while riding a vehicle or the like, and in that case, it is possible to provide content composed of images that can reduce or prevent motion sickness.

  The present invention provides an image display device having an effect that, by this configuration, it is possible to display an image so as to reduce a medical condition that deteriorates the physical condition of a user while suppressing deterioration in image quality as much as possible while riding. can do.

  Hereinafter, an image display device according to an embodiment of the present invention will be described with reference to the drawings.

  An image display device according to a first embodiment of the present invention is shown in FIG.

  First, the configuration will be described. In FIG. 1, an image display device 1 is mounted on a mobile body such as a vehicle, a railroad, an aircraft, a ship, etc. (not shown), and stores content from the content storage means 2 and content storage means 2 to retrieve content. Content analysis means 3 for analyzing the content, content selection means 4 for selecting content that is unlikely to cause motion sickness from the contents stored in the content storage means 2 based on the analysis result by the content analysis means 3, and content selection means 4 And content reproducing means 5 for reproducing the content selected by the above.

  The content storage means 2 includes a hard disk, a nonvolatile memory, an optical disc such as a DVD (Digital Versatile Disc), a CD (Compact Disc), and a Blu-ray disc, a DV (Digital Video), a VHS (Video Home System), and an S-VHS (S-Video). It is configured by any one or more of tape media such as Home System) and D-VHS (Data Video Home System). The content storage unit 2 may be configured to be installed in the mobile body, or may be configured by a content server or a home server installed outside the mobile body that can acquire content via wired or wireless communication.

  The content analysis unit 3 and the content selection unit 4 are implemented as software stored in a semiconductor memory (not shown), and the processing is executed by a CPU (Central Processing Unit), which will be described in detail later. It should be noted that, instead of using software processing in this way, a configuration using processing by hardware such as PGA (Pin Grid Array) or processing by DSP (Digital Signal Processor) may be used. In addition, the content analysis unit 3 and the content selection unit 4 are installed on a mobile body, but may be configured by a content server or a home server installed outside the mobile body.

  The content reproduction means 5 is composed of any one or more of a liquid crystal display, a CRT (Cathode Ray Tube), an organic EL, a plasma display, a projector that projects an image on a screen, a head-mounted display, a head-up display, and the like. The The content reproduction means 5 is mounted on the moving body.

  2 and 3 are flowcharts for executing processing for selecting and displaying content that can reduce the pathological condition of deterioration of the user's physical condition by the CPU of the image display device 1. In addition, the main flowchart shown in FIG. 2 performs the main process for selecting and displaying an image that can reduce the deterioration of the physical condition when the user is in a deteriorated physical condition. It is a flowchart for performing the process which discriminate | determines whether it is a content which can analyze the content of a content among main flowcharts, and can reduce a user's physical condition deterioration.

  First, it is assumed that the user first turns on the image display apparatus 1.

  When the power is turned on, as shown in FIG. 2, the content selection unit 4 requests the content analysis unit 3 to analyze the content details in order to analyze the content stored in the content storage unit 2 (step S1). .

  Upon receiving the analysis request, the content analysis means 3 reads the contents in order from the content storage means 2 and performs content content analysis processing (step S2). This analysis process is executed according to the flowchart shown in FIG.

  That is, as shown in FIG. 3, the content analysis unit 3 sequentially reads the content stored in the content storage unit 2, but first, as the current frame of the read content, the first content included in the content An image of a frame is acquired (step S11), and then an image of the next frame is acquired (step S12).

  A motion vector is calculated based on each acquired image of the frame (step S13). That is, the images of both frames are divided into a plurality of blocks each having a fixed size, and the relative spatial position difference between the blocks that minimizes the difference between the blocks is obtained between the images. This is a motion vector.

  After calculating the motion vector, it is determined whether or not the acquired frame is the final frame of the content (step S14). If the determination result is not the final frame, the next frame is acquired and made the current frame ( In step S11), the motion vector is further obtained, and if the determination result is the final frame, the maximum value among the values of the motion vector calculated so far is obtained in the analyzed content (step S11). S15). This completes the content analysis process for one content.

  Subsequently, it is determined whether or not the analyzed content is the last content among the content stored in the content storage means 2 (step S16). If the determination result is not the last content, the content stored in the content storage unit 2 but not yet analyzed is read, and the same content analysis processing is executed as above. If there is, the content analysis process is terminated. In this way, the content analysis unit 3 performs the content analysis process for all the contents stored in the content storage unit 2. In this way, the content analysis unit 3 sends the maximum value of the motion vector obtained for each content to the content selection unit 4.

  When analyzing the content, the motion vector may be obtained by a method different from the above, and instead of obtaining the maximum value of the motion vector, for example, the average value of the motion vector or the degree of change of the motion vector May be requested. The feature quantity of the motion vector obtained in this way is not limited to one feature quantity, but a plurality of feature quantities such as a maximum value and a change degree may be sent to the content selection unit 4. Further, when a plurality of feature quantities of a motion vector are sent to the content selection means 4, the content selection means 4 weights each feature quantity and averages them instead of the maximum value of the motion vector. It can also be used.

  Here, Step S2 in FIG. 2 and Steps S11 to S16 in FIG. 3 are implemented as software constituting the content analysis means 3 in the semiconductor memory.

  Returning to FIG. 2, when the content selection unit 4 receives information on the maximum value of the motion vector of each content from the content analysis unit 3, the specific value related to the physical condition, for example, the maximum value of the motion vector among these is a constant value. The following contents are selected (step S3), and a list of these contents is sent to the content reproduction means 5.

  The content reproduction means 5 displays the content list sent from the content selection means 4 on the screen (step S4).

  The user selects a desired content from the list displayed on the screen of the content reproduction means 5 (step S5). The content selection unit 4 sends the content selected by the user to the content reproduction unit 5.

  The content reproduction means 5 reproduces the content sent from the content selection means 4 (step S6).

  The content analysis result is stored in the content storage unit 2 separately provided in association with each content, and when the content selection request is received again from the content selection unit 4, The content analysis unit 3 may read the analysis result stored in the content storage unit 2. In this way, it is not necessary to analyze the same content again, and the time for content content analysis processing can be shortened.

  Further, the content analysis is not performed at the time of content selection processing, but is analyzed when new content is stored in the content storage unit 2, and the analysis result is stored in the content storage unit 2 in association with the content. In addition, the analysis result stored in the content storage unit 2 may be read out during the content selection process.

  As described above, in the screen display device 1 according to the first embodiment of the present invention, the content analysis unit 3 analyzes the content content, and the content selection unit 4 generates content that is less likely to cause motion sickness based on the analysis result. By selecting, it is possible to reduce motion sickness of the user due to viewing the image while riding. Even in this case, the quality of the reproduced image can be prevented from being lowered or hardly lowered.

  Next, an image display apparatus according to a second embodiment of the present invention will be described with reference to the drawings. The image display apparatus according to the present embodiment has the same configuration as that of FIG. 1, and the CPU performs processing according to the same flowchart as the main flowchart of FIG. 2, but performs content content analysis processing. The flowchart is different from the flowchart in the image display apparatus according to the first embodiment shown in FIG. Therefore, description of the configuration and the main flowchart is omitted here, and only different portions will be described.

  FIG. 4 is a flowchart showing a flow of content content analysis processing executed by the image display apparatus according to the second embodiment.

  When the image display device is turned on, the content selection unit 4 requests the content analysis unit 3 to analyze the content details. In response to this request, the content analysis unit 3 sequentially reads the content stored in the content storage unit 2, and acquires the first frame image of the content as the current frame of the content to be analyzed (step S21). Perform the process.

  The content analysis unit 3 calculates the brightness of each frame by obtaining the brightness from the value of each pixel of the acquired image of the frame and taking the average value thereof (step S22).

  Next, it is determined whether or not the frame whose brightness is obtained is the last frame of the content (step S23). If the judgment result is not the final frame, the next frame is acquired and its brightness is calculated. If the judgment result is the final frame, the maximum and minimum brightness values for the content are calculated based on the brightness obtained for each frame. (Step S24).

  When the calculation of the maximum value and the minimum value of the brightness in the content is finished, it is determined whether or not the content is the final content among the content stored in the content storage means 2 (step S25). If the determination result is not the final content, the content that has not yet been analyzed from the content storage unit 2 is newly read and the content is further analyzed. If the determination is the final content, the content is analyzed. finish. As described above, the content analysis unit 3 obtains the maximum value and the minimum value of the average brightness for each content for all the contents stored in the content storage unit 2, and selects the maximum value and the minimum value of the brightness of each content as the content. Send to means 4.

  The lightness calculation method described above is an example, and any method may be used as long as the lightness can be calculated. For example, the influence of noise may be eliminated by calculating the brightness after applying an unsharp filter or a noise removal filter to the image. Further, not only the maximum value and minimum value of lightness but also the degree of change in lightness may be obtained. It is also possible to obtain not only one feature quantity but also a plurality of feature quantities related to lightness and send them to the content selection means 4. When a plurality of feature values related to brightness are sent to the content selection unit 4, the content selection unit 4 can use a value obtained by weighting and averaging each feature amount.

  Here, step S2 in FIG. 2 and steps S21 to S25 in FIG. 4 are implemented as software constituting the content analysis means 3 in the semiconductor memory.

  In addition, the content selection unit 4 receives information from the content analysis unit 3 and selects content whose difference between the maximum value and the minimum value of brightness is equal to or less than a certain value.

  As described above, in the image display device according to the present embodiment, by analyzing the brightness of the image of each frame included in the content, to a user who is in a state of poor physical condition or is likely to be in a state of poor physical condition, It is possible to select and provide content with a small contrast. Accordingly, it is possible to reduce the deterioration of the user's physical condition due to viewing an image with a particularly sharp difference in brightness or brightness change during boarding. Even in this case, the quality of the reproduced image can be prevented from being lowered or hardly lowered.

  In the image display device according to the present embodiment, in addition to the analysis of the content content based on the brightness, the motion vector is also analyzed as in the case of the image display device according to the first embodiment. The brightness and motion vector can also be used for content selection. As a content selection method in that case, a method of weighting the parameter obtained by motion vector analysis and the parameter obtained by lightness analysis to obtain an average value can be considered.

  In the image display apparatus according to the present embodiment, since the brightness is used as an index of content that is less likely to cause motion sickness, the brightness of the content is analyzed, but other parameters indicating image characteristics such as saturation, sharpness, etc. It can be used instead or in addition to lightness.

  Next, an image display apparatus according to a third embodiment of the present invention will be described with reference to the drawings.

  FIG. 5 shows the configuration of the image display apparatus 11 of FIG. 1 except that an image display apparatus 11 according to the present embodiment has a physical condition deterioration state reporting means 6 for the user to declare his / her physical condition deterioration condition. The same. The physical condition deterioration state reporting means 6 is composed of, for example, an input button, and when the user presses this input button, the content selection means 4 is in a state where the user is in motion sickness or is likely to become motion sickness I try to figure out what is in

  Next, the operation of the image display device 11 according to the present embodiment will be described.

  It is assumed that the user is not in motion sickness immediately after the vehicle starts. In this case, since the user does not make a report that the physical condition is in a deteriorated state by the physical condition deterioration state reporting unit 6, the content selecting unit 4 determines that the user is not motion sickness, and the content analyzing unit 3 Without requesting analysis of the contents, a list of all contents stored in the content storage means 2 is created, and the content reproduction means 5 is requested to display the list. In response to the request from the content selection unit 4, the content reproduction unit 5 displays a list of all the contents stored in the content storage unit 2. The user can select desired content from the displayed list and view the content.

  Assume that the user becomes motion sick after the vehicle starts. In this case, when the user operates the input button to input that the physical condition is deteriorated, the physical condition deterioration state reporting unit 6 notifies the content selection unit 4 that the user is in a motion sickness state. As in the case of the image display device 1 according to the first embodiment of the present invention, the content selection unit 4 requests the content analysis unit 3 to perform content analysis, and the content analysis unit 3 analyzes the content details. The contents selection means 4 selects contents that are unlikely to deteriorate, and the list is displayed on the contents reproduction means 5 to allow the user to select. As a result, the content reproduction means 5 can reproduce image content that is unlikely to deteriorate.

  In addition, the input button may be configured to identify whether or not it is a motion sickness by operating one, or by using a plurality of input buttons, more detailed physical condition information such as the degree of motion sickness May be configured to be input. In this case, the content selection unit 4 may be configured to change the content to be selected according to the degree of motion sickness. For example, there is a method of changing a parameter threshold at the time of content selection according to the degree of motion sickness.

  In the image display apparatus 11 according to the present embodiment, it is possible to report whether or not the user himself / herself is in motion sickness by the physical condition deterioration state reporting means 6, and the user's physical condition deterioration state can be grasped reliably and easily. In addition, it is possible to provide appropriate content according to the state of deterioration of the user's physical condition.

  Next, an image display apparatus according to a fourth embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 6, the image display device 20 according to the present embodiment has the same configuration as that of the image display device 1 of FIG. 1 except that a physical condition deterioration state estimation unit 7 that estimates a user's physical condition deterioration state is added. The same. The physical condition deterioration state estimation means 7 includes a detection sensor for detecting at least one of heartbeat, respiration, body temperature, sweating, brain waves, etc., a program processed by a CPU or DSP for processing a signal from the detection sensor, or PGA It consists of hardware circuits such as.

  In addition, as a sensor for detecting motion sickness, a CCD (Carge-Coupled Device) camera, a gaze detection sensor, an infrared sensor, a magnetic sensor, or the like is used instead of or in addition to the detection sensor. The person's facial expression, viewpoint, head, limbs, body movement, etc. may be read.

  The operation of the image display device 20 according to the present embodiment will be described.

  It is assumed that the user is not in motion sickness immediately after the vehicle starts. In this case, the physical condition deterioration state estimation means 7 detects that the user is not motion sickness using the various sensors, and notifies the content selection means 4. The content selection unit 4 receives the notification from the physical condition deterioration state estimation unit 7 and creates a list of all the contents stored in the content storage unit 2. In response to the request from the content selection unit 4, the content reproduction unit 5 displays a list of all the contents stored in the content storage unit 2. The user can select desired content from the displayed list and view the content.

  It is assumed that the user is in motion sickness after the vehicle has started. In this case, the physical condition deterioration state estimation means 7 estimates that the user is motion sickness based on the detection signals from the various sensors, and notifies the content selection means 4. The content selection unit 4 receives the notification from the physical condition deterioration state estimation unit 7 and requests the content analysis unit 3 to analyze the content. The content analysis means 3 analyzes the content details, the content selection means 4 selects contents that are unlikely to deteriorate, and the list is displayed on the content reproduction means 5 to be selected by the user. As a result, the content reproduction means 5 can reproduce image content that is unlikely to deteriorate.

  In addition, although the physical condition deterioration state estimation means 7 detects whether the user is motion sickness, not only this but also it detects to the level of motion sickness, and according to the level of motion sickness. The content to be selected may be changed, for example, the parameter threshold at the time of content selection may be changed according to the degree of motion sickness.

  In the image display device 20 according to the present embodiment, the physical condition deterioration state estimation means 7 can estimate the user's physical condition deterioration state without reporting whether or not the user himself is motion sickness. When it is estimated that the physical condition is deteriorated, it is possible to provide appropriate content that is unlikely to become the physical condition deteriorated state.

  Next, an image display apparatus according to a fifth embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 7, the image display device 30 according to the present embodiment includes a physical condition deterioration history storage unit 8 that stores a history of a user's previous physical condition deterioration, and environmental conditions around the content reproduction unit 5. The configuration is the same as that of the image display device 20 according to the fourth embodiment shown in FIG. 6 except that an environmental condition detection means 9 for detection is added.

  The physical condition deterioration history storage means 8 is composed of a storage medium such as a hard disk, a memory, a writable optical disk, etc., but can be physically shared with the content storage means 2.

  The environmental condition detection means 9 detects environmental conditions such as the traveling road state of the vehicle, the traveling time, the elapsed time after the start, the acceleration acting on the vehicle or the user. Use the sensor to detect whether the road surface is dry or wet, or use the information from the navigation system to detect whether the road is straight or winding, such as a mountain road. The clock and the elapsed time after the start are each measured by a timer, and the acceleration is detected by an acceleration sensor.

  The physical condition deterioration history is stored by associating the user's past motion sickness state and the environmental condition detected by the environmental condition detection means 9 at that time according to an instruction from the physical condition deterioration state estimation means 7 or the content selection means 4. The information is stored in the means 8.

  An operation of the image display device 30 according to the present embodiment will be described.

  While the vehicle is running, the content selection means 4 sequentially, for example, at regular time intervals, shows the state of motion sickness of the user to the physical condition deterioration state estimation means 7, and the road condition of the vehicle, the travel time, and the elapsed time after the start. The environmental condition detection means 9 is requested to detect environmental conditions such as time, acceleration applied to the vehicle or the user, and the like. The physical condition deterioration state estimation means 7 performs the same processing as that of the image display device 20 according to the fourth embodiment, detects the user's motion sickness, and notifies the content selection means 4.

  On the other hand, the environmental condition detection means 9 receives the request from the content selection means 4, calculates the elapsed time after the start by, for example, a timer, detects the acceleration applied to the vehicle using an acceleration sensor, and detects these information. Is sent to the content selection means 4.

  The content selection unit 4 associates the user's motion sickness state, the elapsed time from the start of the vehicle, and the acceleration applied to the vehicle based on information from the physical condition deterioration state estimation unit 7 and the environmental condition detection unit 9. And stored in the physical condition deterioration history storage means 8. Further, the content selection means 4 performs the same processing as in the case of the image display apparatus 20 according to the fourth embodiment when the physical condition deterioration state estimation means 7 estimates that the user is in motion sickness. The content selection process is performed.

  On the other hand, when it is estimated that the person is not in motion sickness, refer to the history of physical condition deterioration accumulated in the past, compare with the environmental conditions during the current run, and predict whether it is likely to become motion sickness from now on, If it is likely to cause motion sickness, content that is unlikely to cause motion sickness is selected as in the case of the image display device 20 according to the fourth embodiment.

  In addition, as a method of predicting whether or not it is likely to become motion sickness, for example, analyze the pattern of how much time elapsed in the past, what acceleration and how much acceleration received, and this time It is conceivable to compare the elapsed time and the received acceleration pattern on boarding. However, the prediction method is not limited to the above, and any method may be used as long as the future motion sickness state can be predicted from the past motion sickness history.

  The environmental conditions are not limited to those described above, and other conditions may be used as long as they are conditions relating to the running state of the vehicle or conditions relating to the environment in which the vehicle is running. It may be.

  Next, an image display apparatus according to a sixth embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 8, the image display device 40 according to the present embodiment is a vehicle front situation when the vehicle travels as a moving body front situation detection unit that detects a situation ahead of the moving body where the moving body will advance. Except for the addition of the detection means 10, the configuration is the same as that of the image display device 1 according to the first embodiment described in FIG.

  The vehicle front situation detection means 10 is a program or PGA executed by a CCD camera (imaging unit) that captures a scene in front of the vehicle and a CPU or DSP that processes a video signal from the CCD camera and extracts the situation in front of the vehicle. It consists of hardware circuits such as. Alternatively, the vehicle forward detection means 10 obtains map information, the current vehicle position, the traveling direction, the route, etc. from an external or in-vehicle navigation system, and extracts the road conditions that the vehicle will travel from now on. Also good. In this case as well, it is configured by a program or a hardware circuit as described above.

  The operation of the image display device 40 according to the present embodiment will be described.

  During traveling, the content selection means 4 requests the vehicle forward situation detection means 10 to detect the situation ahead of the vehicle. In response to a request from the content selection unit 4, the vehicle front situation detection unit 10 captures a scene in front of the vehicle with a CCD camera. The vehicle front situation detection means 10 detects a white line from an image captured by a CCD camera, for example, and calculates the curvature radius of the road curve and the number of curves ahead. For example, if the curvature radius is 10 m, “10 "5" if it is 50 m, "1" if it is 100 m, and the number of curves added is calculated as a road curve index and notified to the content selection means 4.

  The content selection unit 4 receives the notification from the vehicle forward situation detection unit 10 and determines that there is a high possibility of motion sickness if the road curve index is greater than or equal to a certain threshold value. The first embodiment The content that is unlikely to cause motion sickness is selected by the same processing as that of the image display apparatus 1 according to the above.

  Here, the road curve index is calculated as described above. However, any calculation method may be used as long as the value becomes larger as the curve becomes steeper or the curve continues. In addition, any road curve index can be used as long as it can be detected from road conditions such as road surface roughness, pavement state, road width, number of lanes, etc. and is related to the likelihood of motion sickness. However, among the above, it is also possible to use a plurality of indices in combination.

  Further, when detecting the vehicle front situation, the vehicle front situation detection means 10 acquires the map data of the navigation system and the vehicle position and direction information instead of the CCD camera, and calculates the curvature radius of the road curve and the number of curves ahead. It is also possible to calculate and calculate the road curve index as in the case of the CCD camera. In this case as well, it is possible to use not only the road curve index but also other indicators instead or in combination with other indicators.

  In the image display device 40 according to the present embodiment, the vehicle forward situation detection means 10 grasps the situation of the road on which the vehicle will proceed and predicts whether or not the user is likely to get motion sickness. Can effectively provide content that is less likely to cause motion sickness before it actually becomes motion sickness.

  In addition, although the case where the content was an image was demonstrated, of course, content only of music may be sufficient. In this case, the upper and lower pitches, volume changes, and the like may be used as parameters.

  As described above, the image display device according to the present invention can provide a user with content that is unlikely to deteriorate, such as motion sickness, by analyzing the content of the content. Display device that has the effect of reducing or preventing the deterioration of the physical condition of a person and selecting and displaying content when mounted on a moving body such as a vehicle, aircraft, ship, railway, etc. Useful as.

The figure which shows the structure of the image display apparatus which concerns on the 1st Embodiment of this invention. Main flowchart executed when content is displayed on the image display apparatus of FIG. Flowchart for performing content analysis when the flowchart of FIG. 2 is executed Flowchart for performing content analysis according to the second embodiment of the present invention The figure which shows the structure of the image display apparatus which concerns on the 3rd Embodiment of this invention. The figure which shows the structure of the image display apparatus which concerns on the 4th Embodiment of this invention. The figure which shows the structure of the image display apparatus which concerns on the 5th Embodiment of this invention. The figure which shows the structure of the image display apparatus which concerns on the 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 20, 30, 40 Image display apparatus 2 Content storage means 3 Content analysis means 4 Content selection means 5 Content reproduction means 6 Physical condition deterioration state notification means 7 Physical condition deterioration state estimation means 8 Physical condition deterioration history storage means 9 Environmental condition detection Means 10 Vehicle forward situation detection means (moving object forward situation detection means)

Claims (10)

Content storage means for storing content;
Content analysis means for taking out the content from the content storage means and analyzing the content;
Content selection means for selecting content of specific conditions related to physical condition based on the analysis result of the content analysis means;
An image display device comprising: content reproduction means for reproducing the content selected by the content selection means. The content analysis means calculates at least one of a motion vector, brightness, sharpness, contrast, and saturation of an image included in the content, and analyzes the content of the content. Image display device. Content storage means for storing the analysis result of the content analyzed by the content analysis means in association with the analyzed content,
The image display apparatus according to claim 1, wherein the content analysis unit reads the analysis result from the content storage unit when the analyzed content is analyzed again. Equipped with a physical condition deterioration means for reporting whether or not the patient is in a poor physical condition,
The content selection means, when it is reported that the physical condition deterioration state reporting means is in a state of poor physical condition, selects content with specific conditions related to physical condition based on the analysis result of the content analysis means. The image display device according to claim 1. Comprising a physical condition deterioration state estimating means for estimating a physical condition deterioration state,
The content selection unit selects content of specific conditions related to physical condition based on the analysis result of the content analysis unit and the physical condition deterioration state estimated by the physical condition deterioration state estimation unit. The image display device according to claim 1. Physical condition deterioration history storage means for storing a history of physical condition deterioration, and environmental condition detection means for detecting environmental conditions,
The content selection means includes an analysis result of the content analysis means, a physical condition deterioration state estimated by the physical condition deterioration state estimation means, a physical condition deterioration history read from the physical condition deterioration history storage means, and the environmental condition detection means 6. The image display device according to claim 5, wherein content having a specific condition related to physical condition is selected based on the environmental condition detected by the step. A moving body forward situation detecting means for detecting a forward situation in which the moving body advances in the future;
The content selection unit selects content of a specific condition related to a physical condition based on an analysis result of the content analysis unit and a detection result of the moving body forward situation detection unit. Image display device. The said moving body front condition detection means has an imaging part which images the image ahead of a moving body, and analyzes the condition ahead of the said moving body based on the image imaged by the said imaging part. The image display device described. 8. The image according to claim 7, wherein the moving object front situation detecting unit detects a situation in front of the moving object based on a current position of the moving object detected by a navigation system and map information of the navigation system. Display device. The image display device according to claim 1, wherein the content reproduction unit is mounted on a moving body.

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