JP5102521B2 - Video display device and binocular visual function inspection device - Google Patents

Description

  The present invention relates to an image display device that displays an image having no distortion on an arbitrary curved surface, and a binocular vision function inspection device including the image display device.

  Conventionally, in an ophthalmic examination, an image is displayed on various display devices. For example, in the Hess screen test described in Non-Patent Document 1 below, the grid pattern is displayed in red by a projector, and a green arrow is projected from a pen-like light emitting device held by the subject's right hand. The subject sequentially points to the point indicated on the red frame with the arrows through the red and green glasses provided in front of the eyes. Then, this operation is performed by reversing the positional relationship between the red and green glasses to check whether the position indicated by the arrow is symmetric.

Conventionally, as a binocular visual function testing device, one described in Patent Document 1 below is known. In order to objectively measure the degree of strabismus, the binocular visual function inspection device displays either one of the reference image and the index image as the left-eye image and the other as the right-eye image on the three-dimensional display device. Let A movement command for moving the display position of the index image is input by the examinee so that the predetermined reference position of the reference image matches the display position of the index image, and based on the movement command, the index image Move the display position. When the inspected person visually recognizes that the reference position of the reference image matches the display position of the index image, the inspector performs confirmation input to that effect, and the deviation of the index image from the reference position of the reference image The amount is calculated.
Toshio Maruo, Mizuo Matsui, Yoshihisa Oguchi, Katsushi Kozaki “Handbook of Ophthalmic Examination” Medical School Publishing, January 15, 1995, p207-209

  However, since the projector described in Non-Patent Document 1 and the 3D display device described in Patent Document 1 do not perform accurate distortion correction processing, inspection is performed using a distorted image.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object thereof is to provide a video display device and a binocular visual function inspection device that can present a video without distortion by performing distortion correction. To do.

The present invention includes an image display device that projects an image on an image display unit having an arbitrary curved surface, and is set by a reference pattern setting unit that sets a reference pattern corresponding to a viewing angle displayed on the image display unit, and a reference pattern setting unit. A video projection unit that inputs video data representing the reference pattern, performs a predetermined distortion correction process on the video data, and projects the video on the video display unit, and allows the video presented on the video presentation unit to be observed without distortion Parameter input means for inputting at least the position parameters of the image display unit and the image projection unit, the shape of the image display unit, the angle of view and characteristics of the image projection unit, and the viewpoint position of the observer, The video projection unit distorts the video data based on the shape of the video display unit input by the input means, the angle of view and characteristics of the video projection unit, and the viewpoint position of the observer. A correction parameter is calculated using a correction parameter calculation unit that calculates a correction parameter for performing a positive process, a projection unit position measurement unit that measures the position of the video projection unit, and a projection unit position measured by the projection unit position measurement unit. A correction parameter update calculation unit for updating, and a viewpoint position measurement unit for measuring the viewpoint position of the observer, wherein the correction parameter update calculation unit is based on the viewpoint position measured by the viewpoint position measurement unit. The correction parameter that holds the reference pattern corresponding to the same viewing angle before and after the movement of the viewpoint position is updated .

  According to the present invention, an image without distortion can be presented by performing distortion correction on a reference pattern corresponding to a viewing angle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The video display device according to the present invention is applied to a video projection unit 2 and a control device 3 in a video display system that displays a video on a video display unit 1 that is a screen configured as shown in FIG. This video display system is mounted on a binocular visual function testing device that allows a subject to observe a video displayed on the video display unit 1.

  For example, the binocular vision function inspection apparatus displays the image light projected from the image projection unit 2 on the image display unit 1 and causes the subject to observe the image displayed on the image display unit 1. On the other hand, the binocular visual function testing device inputs an operation input signal of the input device by operating an input device (not shown) to see how an image currently observed by the subject is viewed. Thus, the binocular visual function testing device is intended to diagnose the visual function of the subject.

  The video display unit 1 of this video display system may have an arbitrary curved surface. In this example, a case where the screen is a dome type screen using a part of a spherical surface that is a concave portion toward the subject will be described. As the image display unit 1 on which the image is projected, for example, a so-called silver screen in which aluminum powder is applied to the surface of the projection surface is used. Furthermore, the shape of the image display unit 1 is not limited to a hemispherical dome shape with a concave portion facing the observer, but may be a flat screen or a quadratic curved screen using a part of a cylindrical shape. A screen formed by variously combining a screen, a flat screen, and a quadric surface may be used. Even in the video display unit 1 having such various shapes, the video display system performs a video distortion correction process corresponding to the shape.

  The video projection unit 2 is a so-called projection type projector. The video projection unit 2 includes a CPU that performs distortion correction processing and the like using various parameters supplied from the control device 3. Of course, even if the video projection unit 1 does not include a CPU, the control device 3 may perform distortion correction processing or the like.

  As shown in FIG. 2, such a video display system has an input I / F unit (parameter input means) 11 for inputting various set values, a correction parameter calculation unit 12, a reference pattern, and the like. A setting unit 13, a correction parameter update calculation unit 14, a first measurement value output unit 15, and a projection unit position measurement unit 16 are provided.

  The reference pattern setting unit 13 sets a reference pattern corresponding to the viewing angle displayed on the video display unit 1. The reference pattern setting unit 13 stores video data representing the reference pattern. In this reference pattern, as shown in FIG. 3, the interval between patterns to be displayed on the video display unit 1 is set with respect to the viewing angle. The reference pattern shown in FIG. 3 is a pattern in which the interval between a plurality of dots is set corresponding to the viewing angle, but is not limited to this, and is not limited to this. ) May correspond to the viewing angle.

  As shown in FIG. 4, the interval Dimg in the reference pattern corresponds to the interval when the reference pattern is viewed at the viewing angle θeye from the viewpoint position Peye separated from the projection plane of the image display unit 1 by the distance Leye, and the image display This corresponds to an interval when image light is projected at an angle of view θproj from the projection position Pproj of the image projection unit 2 separated from the projection plane of the unit 1 by a distance Lproj.

  The input I / F unit 11 includes a projection unit information input unit 21 that inputs the type and angle of view θproj of the video projection unit 2, and a position parameter input unit 22 that inputs positional parameters of the video display unit 1 and the video projection unit 2. And a display unit shape input unit 23 for inputting the shape of the video display unit 1 and a viewpoint position input unit 24 for inputting the viewpoint position Peye of the subject who views the video displayed on the video display unit 1. Various information is input to these input units 21 to 24 by a keyboard of a personal computer (not shown).

  Various information input to the input I / F unit 11 is read by the correction parameter calculation unit 12. The correction parameter calculation unit 12 includes the shape of the video display unit 1 input by the display unit shape input unit 23, the angle of view θproj of the video projection unit 2 input by the projection unit information input unit 21, and the viewpoint position input unit 24. The video projection unit 2 calculates parameters for performing distortion correction processing on the video data, based on the viewpoint position Peye of the subject input by. This correction parameter is a distortion correction table for correcting distortion of video light projected from the video projection unit 2 onto the video display unit 1. This distortion correction table is a correspondence map between a flat projection surface and a mesh model of the projection surface of the image display unit 1 having an arbitrary shape. The image projection unit 2 performs coordinate conversion according to the distortion correction table, and each pixel is converted. This is for converting a video signal for flat display into an output video signal for display on an arbitrary-shaped projection plane. Note that, as described above, a configuration in which the control device 3 performs distortion correction processing or the like and outputs it to the video projection unit 2 may be employed.

  The video projection unit 2 receives video data representing the reference pattern set by the reference pattern setting unit 13, performs a predetermined distortion correction process on the video data, and projects the video on the video display unit 1. When performing this distortion correction processing, the video projection unit 2 performs coordinate conversion according to the distortion correction table calculated by the correction parameter calculation unit 12. The coordinate-converted video data after distortion correction is converted into video light output from the video projection unit 2.

  In the video display system, when the video light is projected from the video projection unit 2 onto the video display unit 1, the projection position measurement unit 16 measures the projection position Pproj of the video projection unit 2. The projection position Pproj of the video projection unit 2 is output from the first measurement value output unit 15 to the correction parameter update calculation unit 14. When the projection position Pproj is input, the correction parameter update calculation unit 14 determines whether or not the projection position Pproj has been changed. If the projection position Pproj has been changed, the correction parameter update calculation unit 14 updates the distortion correction table to project the image. Supply to part 2.

  According to such a video display system, the viewpoint position Peye and the position of the video display unit 1 are determined from the viewpoint position Peye, the position of the video display unit 1 and the projection position Pproj with respect to the interval of the reference pattern (= viewing angle to be displayed). The distance Leye and the distance Lproj between the projection position Pproj and the position of the video display unit 1 are calculated, and the viewing angle when displayed on the video projection unit 2 is calculated.

  In such a video display system, as shown in the processing procedure in FIG. 5, first, when various settings are input to the input I / F unit 11 in step S1, correction parameter calculation is performed in step S2. The correction parameter is calculated by the unit 12. The calculation of the correction parameter (the calculation of the distortion correction table) is a process that may be performed any time before the subsequent step S8.

  In step S <b> 3, the reference pattern setting unit 13 selects a reference pattern. This reference pattern selection processing may be performed by an operation key input by the subject or the administrator of the video display system, or may be automatically and sequentially changed.

In step S4, when the viewing angle θeye is input by the input I / F unit 11, the video projection unit 2 calculates the interval (length) Dimg in the reference pattern in step S5. At this time, Dimg is obtained by calculating the distance Leye × tan (θeye) by the video projection unit 2. The distance Leye uses the distance between the position of the video display unit 1 and the viewpoint position Peye input in step S1. Next, in step S6, the video projection unit 2 calculates the viewing angle (view angle θproj) of the video projection unit 2 from the Dimg obtained in step S5. Here, the angle of view θproj of the video projection unit 2 is obtained by tan ⁻¹ (Dimg / distance Lproj) obtained in step S5. This distance Lproj uses the distance between the position of the image display unit 1 and the projection position Pproj input in step S1.

  In the next step S7, the video projection unit 2 creates a display pattern of the reference pattern selected in step S3. At this time, the video projection unit 2 creates video data of a display pattern for displaying the pattern of the interval Dimg obtained in step S5 at the angle of view θproj of the video projection unit 2.

  In the next step S8, the video projection unit 2 performs a distortion correction process using the distortion correction table calculated in step S2 for the display pattern created in step S7. Thus, distortion correction based on the shape of the video display unit 1, the positional relationship between the video display unit 1 and the video projection unit 2, and the positional relationship between the video display unit 1 and the viewpoint position Peye is applied to the video data.

  In the next step S9, the video projection unit 2 converts the video data to which the distortion correction is applied in step S8 into video light, and projects the video light on the video display unit 1.

  In the next step S10, the projection unit position measurement unit 16 measures the projection position Pproj after the projection of the video light onto the video display unit 1 is started from step S9. The projection position Pproj is sent to the correction parameter update calculation unit 14 via the first measurement value output unit 15. In step S11, the correction parameter update calculation unit 14 determines whether or not the projection position Pproj has been changed from the point in time when distortion correction is applied to step S8. When the projection position Pproj is changed, in step S12, the distortion correction table is updated according to the change of the projection position Pproj, supplied to the video projection unit 2, and distortion correction is performed again in step S8. On the other hand, if the projection position Pproj has not been changed, the process is terminated. Thereby, even if the projection position Pproj is changed after projection, distortion correction corresponding to the change can be performed.

  As described above, according to the video display system to which the present invention is applied, the reference pattern is displayed at the viewing angle specified by the reference pattern setting unit 13 with respect to the specified viewpoint position with respect to the video display unit 1 having an arbitrary shape. Can project without distortion. Furthermore, by applying the projection unit position obtained by the projection unit position measurement unit 16 to the correction parameter update calculation unit 14, the reference pattern viewed from the viewpoint position can be held even after the video projection unit 2 is moved.

  Therefore, according to this video display system, when mounted on the binocular visual function testing device, it is possible to present a video without distortion to the subject and to realize an accurate binocular visual function test of the subject. it can. Further, even if a situation occurs in which the projection position Pproj is changed during the inspection, it is not necessary to quickly correct the distortion and change the display pattern without interrupting the binocular visual function inspection.

  Next, a video display system to which the present invention is applied will be described which further includes a viewpoint position measuring unit that measures the viewpoint position of the subject.

  As shown in FIG. 6, the video display system further includes a second measurement value output unit 31 and a viewpoint position measurement unit 32 connected to the correction parameter update calculation unit 14. The viewpoint position measurement unit 32 may be any apparatus that is installed in, for example, polarized glasses worn by the subject or other objects and moves according to the movement of the viewpoint position Peye.

  When the viewpoint position measurement unit 32 measures the viewpoint position Peye, the viewpoint position measurement unit 32 outputs the viewpoint position Peye to the second measurement value output unit 31. The viewpoint position Peye is input to the correction parameter update calculation unit 14 via the second measurement value output unit 31.

  Based on the viewpoint position measured by the viewpoint position measurement unit 32, the correction parameter update calculation unit 14 updates the correction parameter that holds the reference pattern corresponding to the same viewing angle θeye before and after the movement of the viewpoint position Peye of the subject. That is, the appearance of the display pattern displayed before the change of the viewpoint position Peye and the appearance of the display pattern displayed after the change of the viewpoint position Peye are the same. For this reason, when the viewpoint position Peye is changed, the correction parameter update calculation unit 14 updates the distortion correction table based on the change of the viewpoint position Peye and outputs it to the video projection unit 2.

  As shown in FIG. 7, such a video display system inputs the viewpoint position Peye measured by the viewpoint position measurement unit 32 in step S <b> 21 to the correction parameter update calculation unit 14 via the second measurement value output unit 31. .

  If it is determined in step S22 that the viewpoint position Peye has been changed by the correction parameter update calculation unit 14, the distortion correction table is updated in step S23, and the video projection unit 2 performs distortion correction processing again. Thereby, the appearance of the display pattern can be made the same before and after the movement of the viewpoint position Peye.

  Of course, when the steps S21 to S23 are being performed, the above-described steps S10 to S12 may be performed in parallel.

  As described above, according to the video display system to which the present invention is applied, even when the viewpoint position Peye is changed, the reference pattern viewed from the viewpoint position Peye is retained before and after the movement of the viewpoint position Peye. Can do. Therefore, according to this video display system, when mounted on the binocular visual function testing device, it is possible to present a video without distortion to the subject and to realize an accurate binocular visual function test of the subject. it can. In addition, even if a situation occurs in which the viewpoint position Peye is changed by the movement of the subject during the examination, the display pattern is changed by quickly correcting distortion without interrupting the binocular visual function examination. There is no need.

  Next, a video display system to which the present invention is applied will be described which further includes a display area input unit 41 for switching a display area to be displayed on the video display unit 1 by the video projection unit 2.

  As shown in FIG. 8, the display area input unit 41 of this video display system is connected to the correction parameter update calculation unit 14. In FIG. 8, the position measurement unit 43 connected to the correction parameter update calculation unit 14 corresponds to the projection unit position measurement unit 16 and the viewpoint position measurement unit 32 described above, and the measurement value output unit 42 includes the above-described measurement value output unit 42. This corresponds to the first measurement value output unit 15 and the second measurement value output unit 31.

  As shown in FIGS. 9 and 10, the display area input unit 41 inputs a classification between a display area 1 a for displaying video and a non-display area 1 b in the video display unit 1. Information indicating the display area 1 a and the non-display area 1 b is input to the correction parameter update calculation unit 14. The example shown in FIG. 9 is a case where the approximate center of the video display unit 1 is the display region 1a and the peripheral part of the video display unit 1 is the non-display region 1b. In the example shown in FIG. This is a case where the approximate center of 1 is the non-display area 1b and the peripheral portion of the video display unit 1 is the display area 1a.

  When setting the display area 1a and the non-display area 1b as shown in FIG. 9, for example, by inputting the width W of the display area 1a, the coordinate value representing the display area 1a and / or the coordinate representing the non-display area 1b. Recognize the value. Alternatively, the display area 1a may be specified by specifying an angle of view indicating the projection range of the entire video at the projection position Pproj of the video projection unit 2 as φproj.

  In this way, by switching the display area between the display area 1a as shown in FIG. 9 and the display area 1a as shown in FIG. 10, for example, by displaying an image as shown in FIG. By inspecting the visual appearance of the video and displaying the video as shown in FIG. 10, the visual appearance of the subject in the peripheral vision can be inspected.

  As shown in FIG. 11, in such a video display system, in step S31 after the video light is projected from the video projection unit 2 to the video display unit 1 in step S9, the correction parameter update calculation unit 14 causes the display region 1a to be displayed. It is determined whether or not there is an input for designating. When it is determined that there is a designation input for the display area 1a, the video projection unit 2 performs distortion correction processing in step S32. At this time, the video projection unit 2 performs a distortion correction process using the distortion correction table on the video data constituting the display area 1a.

  As described above, according to the video display system to which the present invention is applied, the reference pattern display area 1a output from the video projection unit 2 can be changed to an arbitrary shape. The distortion correction processing can be performed in response to the change of the display area 1a, such as when examining the display area 1a or when examining the appearance of the image in the peripheral vision of the subject. In the above-described example, the reference pattern display area 1a can be arbitrarily changed, but it is needless to say that only the right half or the left half of the video display unit 1 can be set as the display area 1a according to the examination content of the subject. is there.

  Next, in the video display system to which the present invention is applied, the one that controls the observation viewing angle φeye for viewing the reference pattern from the viewpoint position Peye of the subject will be described. As shown in FIG. 12, the video display system may have a function of measuring the projection position Pproj and the viewpoint position Peye and a function of inputting a display area.

  As shown in FIG. 12, the video display system includes an observation viewing angle input unit 44 for setting the size of the display area 1a with the observation viewing angle φeye as described with reference to FIG. Further, the observation viewing angle input unit 44 may set the non-display area 1b shown in FIG. 10 with the observation viewing angle φeye. The observation viewing angle input unit 44 is connected to the correction parameter update calculation unit 14.

  In such a video display system, as shown in FIG. 13, in step S41 after the video light is projected from the video projection unit 2 to the video display unit 1 in step S9, the correction parameter update calculation unit 14 causes the display region 1a to be displayed. Alternatively, it is determined whether or not an observation viewing angle φeye for designating the non-display area 1b has been input. When it is determined that the observation viewing angle φeye is designated, the video projection unit 2 performs distortion correction processing in step S42. At this time, the video projection unit 2 performs a distortion correction process using the distortion correction table on the video data constituting the display area 1a.

  As described above, according to the video display system to which the present invention is applied, since the observation viewing angle φeye for viewing the reference pattern can be arbitrarily set, the binocular visual function test according to the visual angle θeye of the subject is performed. Even in this case, the distortion correction processing can be performed according to the observation viewing angle φeye desired to be set.

  Next, in the video display system to which the present invention described above is applied, as shown in FIG. 14, a system further provided with a color setting unit 51 for changing the color of the reference pattern set by the reference pattern setting unit 13 will be described. .

  The color setting unit 51 changes the color of the reference pattern set by the reference pattern setting unit 13. This color setting may be performed by an operation key input by the subject or the administrator of the video display system, or may be automatically and sequentially changed.

  For example, in the reference pattern in which dots are arranged as shown in FIGS. 15A and 15B, the background of the reference pattern is black and dots are drawn in yellow as shown in FIG. As shown in FIG. 15B, the background of the reference pattern can be light green and the dots can be drawn in a dark blue color.

  In such a video display system, as shown in FIG. 16, in step S43 after the video light is projected from the video projection unit 2 to the video display unit 1 in step S9, a new color is displayed to the color setting unit 51. It is determined whether there is a specification. When a color is designated, the reference pattern is redrawn with the changed color, and video light is projected from the video projection unit 2 onto the video display unit 1.

  As described above, according to the video display system to which the present invention is applied, by changing the color of the reference pattern, it is easy to see for each subject (for example, providing a high-contrast video to a low vision person) and the background. Colors that are easy to see (for example, if the background is light blue, the reference pattern is changed to black instead of green) can be set on the spot. In addition, when displaying a stereoscopic image, which will be described later, a reference pattern can be displayed in a necessary color when using red / blue glasses or the like.

  Next, the video display system to which the background of the reference pattern can be set in the video display system to which the present invention is applied will be described.

  As shown in FIG. 17, the video display system includes a background image designating unit 61 that sets a background image as a background of the reference pattern set by the reference pattern setting unit 13, and a reference set by the reference pattern setting unit 13. A superimposing unit 62 that superimposes the background image set by the background image designating unit 61 on the pattern is further provided.

  As a background specified by the background image specifying unit 61, for example, as shown in FIG. When the background image of the aerial video is designated, the background image designating unit 61 outputs the background image to the superimposing unit 62. When the reference pattern shown in FIG. 18B is input from the reference pattern setting unit 13, the superimposing unit 62 superimposes the background image and the reference pattern to create a superimposed image shown in FIG. 18C. And output to the video projection unit 2.

  In such a video display system, as shown in FIG. 19, in step S51 after projecting video light from the video projection unit 2 to the video display unit 1 in step S9, a background image is displayed on the background image designating unit 61. It is determined whether there is a new designation. When the background image is specified, the superimposing unit 62 reads the background image from the background image specifying unit 61 in step S52, and the reference already set by the reference pattern setting unit 13 in step S53. The pattern and the background image are superimposed.

  As described above, according to the video display system to which the present invention is applied, it is possible to display an image closer to everyday life by displaying a reference pattern on a background such as a landscape photograph as well as a black background and a single color background. Binocular visual function test can be realized while watching.

  Next, a description will be given of the calculation of the correction parameter using previously stored data in the video display system to which the present invention is applied.

  In this video display system, as shown in FIG. 20, the correction parameter calculation unit 12 calculates the correction parameter using the viewpoint position Peye input to the viewpoint position input unit 24 and displays the video. Storage unit 71 that stores viewpoint position data including right eye position, left eye position, center position of right eye position and left eye position, viewpoint height heye or height h. The subject's right eye position, left eye position, and the relationship between the right eye position and the center position of the left eye position, as shown in FIG. 21, are the individual interocular distances (d, -d) with the viewpoint position Peye as the center position. The position depending on the right eye position and the left eye position. Thereafter, when the same subject performs the binocular visual function test again, the correction parameter calculation unit 12 reads the viewpoint position data stored in the storage unit 71 and calculates the correction parameter.

When there is no viewpoint height data, the viewpoint height is virtually set from the height of the subject. As shown in FIG. 21, it is assumed that the center of the right eye and the left eye is virtually set as the viewpoint position Peye, and the right eye and the left eye are separated by d in each direction. In this case, the virtual viewpoint position Pveye can be set as shown in the top view of FIG. 22A and the side view of FIG. And the center of the right eye and the left eye, the point of view height, to a viewpoint height was derived for the height h _v of the virtual subject. The right eye and the left eye may be recorded as one data as d, and in the case of the left eye as -d, the viewpoint height may be recorded instead of the height. In addition, for convenience of data reading, it is possible to give a name at the time of registration, record a date, and give a serial number.

  In such a video display system, as shown in FIG. 23, in step S61 after step S1, the correction parameter calculation unit 12 is stored in the storage unit 71 based on various information input in step S1. Whether or not to read the stored data is determined, and when the data is to be read, the stored value is read in step S62. On the other hand, when the stored value of the storage unit 71 is not read, in step S63, it is determined whether or not the various data input in step S1 is stored in the storage unit 71. Then, the process proceeds to step S2. At this time, the memory | storage part 71 may determine whether it preserve | saves in the memory | storage part 71 for every item input by step S1. In FIG. 23, any of the processes described above may be performed as the process after step S9.

  As described above, according to the video display system to which the present invention is applied, the right eye position, the left eye position, the center position of the right eye position and the left eye position of the subject regarding the subject who has performed the binocular visual function test even once, By storing viewpoint position data consisting of viewpoint height or height, a reference pattern without distortion seen from the subject can be displayed in a short time at the next binocular visual function test.

  Next, a description will be given of a video display system to which the present invention can be applied that can select a correction parameter.

  As shown in FIG. 24, the video display system further includes a storage unit 71 and a temporary storage unit 81 for storing the correction parameters calculated by the correction parameter calculation unit 12. The video projection unit 2 stores the correction parameters in the storage unit 71. Based on the corrected parameters, the shape of the video display unit 1 input from the input I / F unit 11, the angle of view of the video projection unit 2, and the viewpoint position of the observer input by the viewpoint position input unit 24. Among the calculated correction parameters, a distortion correction process is performed using a selected correction parameter.

  The temporary storage unit 81 temporarily saves the correction parameter calculated by the correction parameter calculation unit 12 based on the value set by the input I / F unit 11 or the correction parameter stored and read in the storage unit 71. . The temporary storage unit 81 outputs correction parameters to the correction parameter update calculation unit 14 as necessary. When the correction parameter is received from the temporary storage unit 81, the correction parameter update calculation unit 14 outputs the correction parameter passed from the temporary storage unit 81 to the video projection unit 2, and performs distortion correction processing on the reference pattern using the correction parameter. Let

  As shown in FIG. 25, such a video display system determines in step S71 whether or not to save various information input in step S1, and stores various information in step S72 as necessary. . Thereafter, the video display system calculates the first correction parameter using the various information input in step S1 in step S73, and stores the calculated first correction parameter in the temporary storage unit 81 in step S74. Next, the correction parameter calculation unit 12 reads various past information of the same subject previously stored in the storage unit 71 in step S75, and performs the second correction using the read various information in step S76. The parameter is calculated, and the second correction parameter is stored in the temporary storage unit 81 in step S77.

  Thereafter, after step S3 to step S7, the video display system selects a first correction parameter in step S78 and determines whether or not to perform distortion correction processing. When the distortion correction processing is performed by selecting the first correction parameter, in step S79, the correction parameter calculation unit 12 reads the first correction parameter from the temporary storage unit 81, selects the second correction parameter, and corrects the distortion. When processing is performed, the second correction parameter is read from the temporary storage unit 81 by the correction parameter calculation unit 12 in step S80.

  Next, in step S8, the correction parameter read in step S79 or step S80 is sent from the correction parameter calculation unit 12 to the video projection unit 2, and the video projection unit 2 performs distortion correction processing using any correction parameter. In subsequent step S9, the image light of the reference pattern is projected from the image projection unit 2 onto the image display unit 1.

  Next, for example, when an operation input signal indicating whether or not further correction of the reference pattern needs to be performed is input by operating the input device of the subject or the administrator, it is necessary to perform further distortion correction processing. If it is determined that there is, the process returns from step S81 to step S78. Also in this step S78, it is determined whether or not to select the first correction parameter or the second correction parameter.

  As described above, according to the video display system to which the present invention is applied, the correction parameter obtained when the binocular visual function test was previously performed is stored in the storage unit 71, and this correction parameter and the input I at this time are stored. The correction parameter calculated by the correction parameter calculation unit 12 based on various information input from the / F unit 11 can be compared. Therefore, the comparison of data can be realized by tracking the history of the binocular visual function test by comparing the correction parameters.

  Next, a description will be given of a video display system to which the present invention is applied, in which the display position of the reference pattern displayed on the video display unit 1 is changed.

  As shown in FIG. 26, the video display system includes a display position designation unit 91 connected to the correction parameter calculation unit 12 and the correction parameter update calculation unit 14. The display position specifying unit 91 is an external operation that is set by the reference pattern setting unit 13 and is operated to change the display position of the reference pattern projected from the video projection unit 2 and displayed on the video display unit 1. Means.

  When the display position of the reference pattern in the video display unit 1 is specified by the display position specifying unit 91, the correction parameter calculation unit 12 and the correction parameter update calculation unit 14 calculate the display position based on the specified display position. Then, a correction parameter for calculating an image without distortion even when displayed at the changed display position is calculated.

  For example, as shown in FIG. 27, the display position designating unit 91 may input the movement angle θ of the viewpoint position Peye as a change value of the display position of the reference pattern. As shown in FIG. The amount of movement in the four directions of up, down, left and right may be inputted as a change value of the display position of the reference pattern. When the movement angle θ is input to the display position designating unit 91, the correction parameter calculation unit 12 and the correction parameter update calculation unit 14 calculate the movement distance Ltanθ of the reference pattern that is changed by the movement angle θ.

  In such a video display system, as shown in FIG. 29, the display position is designated to the display position designation unit 91 in step S81 after calculating the correction parameters for distortion correction in step S2. In this case, the display parameter information is supplied to the correction parameter calculation unit 12. On the other hand, the correction parameter calculation unit 12 calculates the display position in step S82, and performs the processing after step S3. As a result, the reference pattern is displayed at the display position designated in step S81. Thereafter, the correction parameter update calculation unit 14 determines whether or not the display position of the reference pattern is specified in the display position specifying unit 91. If the display position of the reference pattern is changed, the display position is displayed in step S84. Is recalculated, and the process returns to step S7.

  As described above, according to the video display system to which the present invention is applied, in the binocular visual function test, the display position of the reference pattern can be arbitrarily set according to the intention of the subject or the administrator, and any location Can display the reference pattern. Thereby, the freedom degree of a binocular visual function test | inspection can be raised.

  Next, a video display system to which the present invention is applied will be described using a plurality of video projection units 2.

  As shown in FIG. 30, the video display system includes three video projection units 2A, 2B, and 2C, and the three video projection units 2A, 2B, and 2C are controlled by a single control device 3. Yes. Further, as shown in FIG. 31, one control device 3A, 3B, 3C may be connected to each of the video projection units 2A, 2B, 2C.

  As described above, according to the video display system including the video projection units 2A, 2B, 2C, for example, as shown in FIG. Can be displayed, and a high-resolution video 102 ′ can be displayed at the center of the video display unit 1. In other words, the control device 3 connected to the first video projection unit 2 combines the low resolution video 101 and the display range information 103 that masks the central portion, so that the low resolution video 101 ′ displayed on the outer peripheral portion is the first. The high-resolution video 102 and the display range information 104 for masking the outer periphery are combined by the control device 3 that is projected from the video projection unit 2 and connected to the second video projection unit 2, and is displayed at the center. The resolution image 102 ′ can be projected from the second image projection unit 2.

  Further, the present invention is not limited to the example shown in FIG. 32, and a combination of displaying a grid-like image on the left half of the image display unit 1 and displaying a geometric figure image on the right half of the image display unit 1 or the same graphic. Multiple videos such as those with different colors can be combined and output.

  As shown in FIG. 33, such a video display system designates display areas as many as the number of video projecting units 2A, 2B, and 2C in step S91 in which the processing of steps S1 to S7 is performed. At this time, the display position designation unit 91 shown in FIG. 26 inputs the display areas for the video projection units 2A, 2B, and 2C to the control devices 3A, 3B, and 3C, respectively. In the next step S92, display areas are calculated by the control devices 3A, 3B, and 3C connected to the video projection units 2A, 2B, and 2C, and display areas are designated for all the video projection units 2A, 2B, and 2C. In step S9, images are projected from the image projection units 2A, 2B, and 2C after the distortion correction processing in step S8.

  As described above, according to the video display system to which the present invention is applied, when different video projection units 2 are used for different display areas in the video display unit 1 as shown in FIG. When a video is projected on the video display unit 1, a video that cannot be realized by the single video projection unit 2 can be projected, such as a case where the luminance is changed by overlapping two identical videos. Thereby, according to the binocular visual function inspection apparatus equipped with this video display system, the degree of freedom of the binocular visual function inspection can be increased.

  Next, in the video display system to which the present invention is applied, a description will be given of what displays the reference pattern set by the reference pattern setting unit 13 as a stereoscopic video.

  As shown in FIG. 34, this video display system is configured by connecting a video projection unit 2R that projects a right-eye video and a video projection unit 2L that projects a left-eye video to a control device 3. Yes. The right-eye video and the left-eye video are the same video with parallax depending on the display position in the depth direction. The right eye image and the left eye image may be input to the left and right viewpoints, and a single viewpoint value d (usually about 2.7 to 3.3 cm) is used. A right-eye image shifted by + d from the position Peye and a left-eye image shifted by −d from the central viewpoint position Peye may be used.

  As shown in FIG. 35, the video display system includes a video projection unit 2R and a right eye correction processing unit 110R and a left eye correction processing unit 110L connected to the video projection unit 2L, respectively. The right-eye correction processing unit 110R and the left-eye correction processing unit 110L perform distortion correction processing using the right-eye correction parameter and the left-eye correction parameter, respectively. When the right eye correction processing unit 110R and the left eye correction processing unit 110L are provided, the reference pattern setting processing or the like may be performed by any of the processing units 110, and the common processing is performed by one processing unit 110. You can go. Note that these processing units 110 have the same functions as the control device 3 described above.

  As shown in FIG. 36, a common processing unit 111 that performs processing common to the right-eye correction processing unit 110R and the left-eye correction processing unit 110L is connected, so that the processing of the input I / F unit 11 and the reference Common processing such as processing of the pattern setting unit 13 may be performed.

  In such a video display system, in order to make the reference pattern set by the reference pattern setting unit 13 into a three-dimensional image, as shown in FIG. 37, the video projection unit 2R and the video projection unit 2L are for the right eye, The polarizing filters 121R and 121L for eyes are installed, and the subject is provided with a polarizing plate 122 having the same polarizing filter as the video projection unit 2R and the video projection unit 2L in front of the right eye and the left eye. Further, when images are alternately projected by the image projection unit 2R and the image projection unit 2L, liquid crystal shutter glasses that perform a shutter operation corresponding to the time division control may be attached to the subject.

  As described above, when displaying the three-dimensional reference pattern by the video display system, in step S101 after step S1, the distortion correction is performed when the video display unit 1 is viewed from the viewpoint positions of the right eye and the left eye. Correction parameters are set, and the respective correction parameters are temporarily stored. Thereafter, in steps S3 to S7, processing common to the video projection unit 2R and the video projection unit 2L is performed, and then in step S103, the video projection unit 2R and the video projection unit 2L output the right-eye video. If it is determined whether or not to output the right-eye video, the process of step S104 to step S106 is performed. If not, the process of step S107 to step S109 is performed. That is, the video projection unit 2R performs the processes of steps S104 to S106, and the video projection unit 2L performs the processes of steps S107 to S109.

  Steps S104 and 107 create right-eye video and left-eye video, respectively. Steps S105 and 108 perform distortion correction processing on the right-eye video and left-eye video, respectively. Steps S106 and 109 respectively The right-eye video and the left-eye video are projected by the video projection unit 2R and the video projection unit 2L. Accordingly, the video display system can display a three-dimensional reference pattern on the video display unit 1 by using the two video projection units 2R and 2L.

  Further, in the case of displaying the three-dimensional reference pattern on the video display unit 1 in this way, it is desirable to perform the processing shown in FIG. 38 by a plurality of processing units.

  That is, when two first processing units and second processing units are provided, as shown in FIG. 39, the processing A in steps S1 to S3 and the processing C in steps S3 to S106 are performed in the first processing unit. , Step B in Steps S2 and S3 and Step D in Steps S107 to S109 are performed by the second processing unit. As another example shown in FIG. 40, when three first processing units, a second processing unit, and a third processing unit are provided, the processing A of only step S1 is performed by the first processing unit, and image projection is performed. Processes B and C in steps S101 and S102, which are calculations performed by the unit 2R and the video projection unit 2L, are performed by the second processing unit and the third processing unit. Further, the processing D in steps S3 to S7, which is a common process for the video projection unit 2R and the video projection unit 2L, is performed in the first processing unit, and the processing E in steps S104 to S106 for the right-eye video is performed in the first. The second processing unit performs steps S107 to S109 for the left-eye video in the third processing unit. As described above, by dividing the processing burden among the plurality of processing units, it is possible to smoothly realize the process of displaying the reference pattern in the stereoscopic video.

  As described above, according to the video display system to which the present invention is applied, not only the inspection method for performing the binocular visual function test by separately displaying the video for the right eye and the video for the left eye, The image for the left eye can be displayed on the image display unit 1 at the same time, and the image can be displayed at an arbitrary position including the depth direction unique to stereoscopic viewing. Thereby, in the binocular visual function test, the test in the depth direction can be performed with an image having no distortion.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

1 is a block diagram of a video display system to which the present invention is applied. It is a block diagram which shows the functional structure in the video display system to which this invention is applied. It is a figure which shows the reference | standard pattern displayed on a video display part in the video display system to which this invention is applied. It is a figure which shows the relationship between a viewing angle and a view angle in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of displaying a reference | standard pattern by the video display system to which this invention is applied. It is a block diagram which shows the functional structure which added the structure which measures a viewpoint position in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of displaying the reference | standard pattern by adding the process which measures a viewpoint position in the video display system to which this invention is applied. In the video display system to which the present invention is applied, it is a block diagram showing a functional configuration to which a configuration for inputting a display area is added. It is explanatory drawing of designating the width | variety of a display area in the video display system to which this invention is applied. In the video display system to which the present invention is applied, it is an explanatory diagram that the approximate center of the video display unit is a non-display area 1b. It is a flowchart which shows the process at the time of adding the process which inputs a display area, and displaying a reference | standard pattern in the video display system to which this invention is applied. It is a block diagram which shows the functional structure which added the structure which inputs a viewing angle in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of displaying the reference | standard pattern by adding the process which inputs a viewing angle in the video display system to which this invention is applied. It is a block diagram which shows the functional structure which added the structure which inputs the color of a reference | standard pattern in the video display system to which this invention is applied. It is explanatory drawing of the process which polarizes the color of a reference | standard pattern in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of adding the process which inputs the color of a reference | standard pattern, and displaying a reference | standard pattern in the video display system to which this invention is applied. In the video display system to which the present invention is applied, it is a block diagram showing a functional configuration to which a configuration for designating a background image is added. It is explanatory drawing of the process which superimposes a background image on a reference | standard pattern in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of displaying the reference | standard pattern by adding the process which designates a background image in the video display system to which this invention is applied. It is a block diagram which shows the functional structure which added the structure which memorize | stores the various information input in the video display system to which this invention is applied. It is explanatory drawing of the right eye position and left eye position with respect to viewpoint position Peye. It is the top view and side view when a virtual viewpoint position is set. It is a flowchart which shows the process at the time of displaying the reference | standard pattern by adding the process which memorize | stores various information in the video display system to which this invention is applied. It is a block diagram which shows the functional structure which added the structure which memorize | stores a correction parameter in the video display system to which this invention is applied. It is a flowchart which shows the process at the time of adding the process which memorize | stores a correction parameter, and displaying a reference | standard pattern in the video display system to which this invention is applied. In the video display system to which the present invention is applied, it is a block diagram showing a functional configuration to which a configuration for specifying a display position is added. It is explanatory drawing of using the moving angle of a viewing angle for designation | designated of a display position in the video display system to which this invention is applied. In the video display system to which the present invention is applied, it is an explanatory diagram of using the vertical and horizontal movements of the reference pattern for designating the display position. It is a flowchart which shows the process at the time of displaying the reference | standard pattern by adding the process which designates a display position in the video display system to which this invention is applied. 1 is a block diagram of a configuration including a plurality of video projection units in a video display system to which the present invention is applied. FIG. 10 is a block diagram of another configuration including a plurality of video projection units in a video display system to which the present invention is applied. It is explanatory drawing of the process which displays a video different in the outer periphery and center of a video display part in the video display system to which this invention is applied. It is a flowchart of the process which displays a reference | standard pattern by the structure provided with the several image | video projection part in the image | video display system to which this invention is applied. In the video display system to which the present invention is applied, it is a block diagram of a configuration that includes a plurality of video projection units and displays a stereoscopic video. In the video display system to which the present invention is applied, it is a block diagram of another configuration that includes a plurality of video projection units and displays a stereoscopic video. In the video display system to which the present invention is applied, it is a block diagram of another configuration that includes a plurality of video projection units and displays a stereoscopic video. In the video display system to which the present invention is applied, it is a block diagram of another configuration for displaying a stereoscopic video by a polarization method. It is a flowchart of the process which displays the solid reference | standard pattern in the video display system to which this invention is applied. In the video display system to which the present invention is applied, the processing is shared by a plurality of processing units to display a three-dimensional reference pattern. In the video display system to which the present invention is applied, the processing is shared by a plurality of processing units, and is a flowchart of other processing for displaying a three-dimensional reference pattern.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image | video display part 1a Display area 1b Non-display area 2 Image | video projection part 2A, 2B, 2C Image | video projection part 2L Image | video projection part 2R Image | video projection part 3 Control apparatus 3A, 3B, 3C Control apparatus 11 Input I / F part 12 Correction parameter Calculation unit 13 Reference pattern setting unit 14 Correction parameter update calculation unit 15 First measurement value output unit 16 Projection unit position measurement unit 21 Projection unit information input unit 22 Position parameter input unit 23 Display unit shape input unit 24 Viewpoint position input unit 31 First 2 Measurement value output unit 32 Viewpoint position measurement unit 41 Display area input unit 42 Measurement value output unit 43 Position measurement unit 44 Observation viewing angle input unit 51 Color setting unit 61 Background image designation unit 62 Superimposition unit 71 Storage unit 81 Temporary storage unit 91 Display position designation unit 101 Low resolution video 102 High resolution video 103 Display range information 104 Display range information 110 Parts 110L for the left eye correction processing unit 110R for the right eye correction processing unit 111 shared processing unit 121 polarizing filter 122 polarizer

Claims (11)

An image display device that projects an image on an arbitrary curved image display unit,
A reference pattern setting unit that sets a reference pattern corresponding to a viewing angle displayed on the video display unit;
A video projection unit that inputs video data representing a reference pattern set by the reference pattern setting unit, performs a predetermined distortion correction process on the video data, and projects a video on the video display unit;
As parameters for observing the video presented to the video presentation means without distortion, positional parameters of the video display unit and the video projection unit, the shape of the video display unit, the angle of view of the video projection unit, and Parameter input means for inputting at least the characteristics and the viewpoint position of the observer;
The video projection unit performs distortion correction processing on the video data based on the shape of the video display unit input by the parameter input unit, the angle of view and characteristics of the video projection unit, and the viewpoint position of the observer. A correction parameter calculation unit for calculating a correction parameter to be applied;
A projection unit position measurement unit for measuring the position of the video projection unit;
A correction parameter update calculation unit that updates the correction parameter using the projection unit position measured by the projection unit position measurement unit ;
A viewpoint position measuring unit that measures the viewpoint position of the observer,
The correction parameter update calculation unit updates the correction parameter holding the reference pattern corresponding to the same viewing angle before and after the movement of the observer's viewpoint position based on the viewpoint position measured by the viewpoint position measurement unit. A characteristic video display device. The video display apparatus according to claim 1 , further comprising a display area switching unit that switches a display area to be displayed on the video display unit by the video projection unit. Video display according to the viewer's further comprising a viewing angle changing means for controlling the observation viewing angle from the viewpoint position to claim 1 or claim 2, characterized in. Video display according to any one of claims 1 to 3, further comprising a color setting unit to change the color of the reference pattern set in the reference pattern setting unit. A background image designating unit for setting a background image as a background of the reference pattern set by the reference pattern setting unit;
Any one of claims 1 to 4, characterized in that further comprising a superimposing unit that superimposes the background image set in the background image specifying unit to a reference pattern set by the reference pattern setting section The video display device described in 1. After the correction parameter is calculated by the correction parameter calculation unit using the viewpoint position input to the parameter input means and the image is displayed, at least the right eye position, the left eye position, the right eye position, and the left of the viewer A storage unit that stores viewpoint position data including the center position, viewpoint height, or height of the eye position;
The video display device according to any one of claims 1 to 5 , wherein the correction parameter calculation unit calculates the correction parameter by reading the viewpoint position data stored in the storage unit. A storage unit for storing the correction parameter calculated by the correction parameter calculation unit;
The video projection unit is based on the correction parameters stored in the storage unit, the shape of the video display unit input by the parameter input unit, the angle of view of the video projection unit, and the viewpoint position of the observer. of the calculated correction parameter Te, the image display device according to any one of claims 1 to 6, characterized in that performing the distortion correction processing using the selected correction parameter. The apparatus further comprises an external operation means that is set by the reference pattern setting unit, and is operated to change a display position of the reference pattern that is projected from the video projection unit and displayed on the video display unit. The video display device according to any one of claims 1 to 7 . Wherein a plurality of the image projection unit, an image display device according to different video from the image projection unit to any one of claims 1 to 8, characterized in that to be displayed on the video display device. The image projection section, the image display device according to any one of claims 1 to 9, characterized in that to display the reference pattern set by the reference pattern setting unit as the stereoscopic images. A video display device according to any one of claims 1 to 10 , comprising:
The binocular visual function inspection device, wherein the reference pattern set by the reference pattern setting unit is an image for a binocular visual function inspection of an observer.

Images