JPH10322724A - Stereoscopic vision inspection device and computer readable recording medium recording stereoscopic vision inspection program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need of making an inspector observe the movement of the eyes of a person to be inspected in a prescribed inspection by displaying three- dimensional images for which stereoscopic images are moved on a background image at a three-dimensional image display device and judging the stereoscopic vision function of the eyes of the person to be inspected based on information relating to the movement of the eyes of the person to be inspected. SOLUTION: By generating an image for a left eye and the image for a right eye for which a square image is moved back and forth in a set movement cycle and successively sending them to a second frame memory 16, a square random dot image is displayed on the 3D display device 2 in the state of floating to the background. The images from a CCD camera 3 are successively fetched, the movement of the eyes of the person to be inspected is extracted based on the images and the stereoscopic vision of the person to be inspected is judged based on the extracted movement of the eyes of the person to be inspected. For instance, the cycle of the movement of the eyes of the person to be inspected measured based on picked-up images and the cycle of the square random dot image are compared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic inspection apparatus for inspecting whether or not stereoscopic vision is obtained by binocular fusion with near vision in daily vision, and a computer-readable recording medium storing a stereoscopic inspection program. About.

[0002]

2. Description of the Related Art The present applicant has already developed a method called a random dot test as a method for inspecting whether or not stereoscopic vision is obtained by binocular fusion with near vision in daily vision (Japanese Unexamined Patent Publication No. -98949). In addition,
Stereoscopic vision conceptually refers to the ability to stereoscopically capture an object by fusing both eyes. Specifically, it is expressed as the ability to perceive a slight difference in depth between two points due to fusion of the two eyes.

In the random dot test, for example, the background is a random dot image, and a square random dot image floating from the background is moved in the horizontal direction. Then, the examiner checks whether or not the subject's eyes are following the square random dot image, thereby inspecting whether or not the subject has stereoscopic vision.

In such a random dot test, it is necessary for the inspector to check whether the eyes of the inspected person are following a square random dot image.

[0005]

SUMMARY OF THE INVENTION The present invention provides a stereoscopic inspection apparatus and a stereoscopic vision inspection system which can automatically determine the stereoscopic function of a subject without observing the eye movements of the subject. It is an object of the present invention to provide a computer-readable recording medium on which an inspection program is recorded.

[0006]

SUMMARY OF THE INVENTION A stereoscopic inspection apparatus according to the present invention is a three-dimensional display apparatus in which a stereoscopic image composed of random dot moving images moves on a background image composed of random dot moving images. Display means for displaying a three-dimensional image on a three-dimensional display device, an imaging device for imaging the eye movement of the subject, and information on the eye movement of the subject obtained based on the captured image of the imaging device. On the basis of,
It is characterized by comprising a determination means for determining whether or not the stereoscopic function of the subject is normal.

[0007] As the display means, for example, a three-dimensional image in which a three-dimensional image composed of random-dot moving images moves periodically at a predetermined period on a background image composed of random-dot moving images. Is used as the determination means, for example, by measuring the period of the eye movement of the subject based on the captured image of the imaging device,
A device that determines whether the stereoscopic function of the subject is normal by comparing the measured period of the eyes with the moving period of the stereoscopic image is used.

[0008] As the display means, for example, a three-dimensional image in which a three-dimensional image composed of moving images of random dots reciprocates in a predetermined cycle on a background image composed of moving images of random dots is displayed on a three-dimensional display device. For example, the determination unit measures a period of the eye movement of the subject based on an image captured by the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image. Thus, a device that determines whether or not the stereoscopic function of the subject is normal is used.

In this case, the period of the eye movement of the subject is
For example, it is obtained as follows. The motion vector of the eye movement of the subject is measured based on the image captured by the imaging device, and the time from the time when the motion vector becomes 0 to the time when the next motion vector becomes 0 is measured a plurality of times. I do. Then, the period of the eye movement of the subject is obtained based on the average value of the obtained measurement values.

A computer-readable recording medium on which a stereoscopic inspection program according to the present invention is recorded is a three-dimensional image in which a stereoscopic image composed of moving images of random dots moves on a background image composed of moving images of random dots. Is displayed on a three-dimensional display device, and the information about the eye movement of the subject obtained based on the captured image of the imaging device for capturing the eye movement of the subject is obtained. A stereoscopic inspection program for causing a computer to realize a determination function of determining whether or not the stereoscopic function of the user is normal.

The display function is, for example, to display a three-dimensional image in which a three-dimensional image composed of moving images of random dots moves periodically on a three-dimensional display device on a background image composed of moving images of random dots. It is a function to display
The determination function measures, for example, the period of the eye movement of the subject based on the image captured by the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image. Is a function to determine whether or not the stereoscopic function is normal.

The display function is, for example, a three-dimensional image in which a three-dimensional image composed of random dot moving images reciprocates at a predetermined cycle on a background image composed of random dot moving images. The determination function is, for example, measuring the period of the eye movement of the subject based on the image captured by the imaging device, and comparing the measured eye period with the movement period of the stereoscopic image. By
This is a function for determining whether or not the stereoscopic function of the subject is normal.

In this case, the period of the eye movement of the subject is
For example, it is obtained as follows. The motion vector of the eye movement of the subject is measured based on the image captured by the imaging device, and the time from the time when the motion vector becomes 0 to the time when the next motion vector becomes 0 is measured a plurality of times. I do. Then, the period of the eye movement of the subject is obtained based on the average value of the obtained measurement values.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the appearance of the stereoscopic inspection apparatus.

The stereoscopic inspection apparatus includes a personal computer 1 operated by an inspector and a three-dimensional display apparatus (3) for providing an inspected person with an image for stereoscopic inspection.
A D display device 2, a CCD camera 3 attached to the 3D display device 2 for imaging the eye movement of the subject, and a speaker 4 for providing voice guidance or the like to the subject. . In this example, the personal computer 1 has a two-dimensional display (2
D display) 19 is used. As the 3D display device 2, a parallax barrier type is used.

FIG. 2 shows the configuration of the stereoscopic inspection apparatus.

The personal computer 1 has a CPU 11
Is controlled by A hard disk 12 for storing the program (stereoscopic inspection program) and a memory 13 for storing necessary data are connected to the CPU 11. Further, an input device 14 including a mouse, a CCD camera 3 and a voice synthesizing device 5 are connected to the CPU 11. The voice synthesizer 5 is connected to the speaker 4.

Further, a first frame memory 15 and a second frame memory 16 are connected to the CPU 11. The first frame memory 15 stores the D / A converter 1
7 is connected to the 2D display 19. The second frame memory 16 is connected to the 3D display device 2 via a D / A converter 18.

FIG. 3 shows the configuration of the display unit of the 3D display device 2.

As shown in FIG. 4, the 3D display device 2 displays a reduced left-eye image 30L, which is obtained by reducing the original left-eye image by half in the horizontal direction, from the personal computer 1, and an original right-eye image. Information 30 consisting of a right-eye reduced image 30R in which the image for use has been reduced by half in the horizontal direction.
Is sent. The 3D display device 2 decomposes the received left-eye reduced image and right-eye reduced image into vertically elongated strip images, respectively, and displays a left-eye strip image 31L on the liquid crystal panel 21 as shown in FIG. The right-eye strip images 31R are alternately arranged in the horizontal direction and displayed.

On the back side of the liquid crystal panel 21, a backlight 22 is provided. On the front side of the liquid crystal panel 21, a parallax barrier 23 in which openings 23a and light shielding portions 23b are alternately arranged in the horizontal direction is arranged. When the subject observes the image on the liquid crystal panel 21 through the parallax barrier 23, the left eye L sees only the strip image for the left eye, and the right eye sees only the strip image for the right eye. .

In this stereoscopic inspection apparatus, a random dot test is performed. In the random dot test, the background is a random dot image, and a square random dot image raised from the background is moved in the horizontal direction.

The background random dot image and the square random dot image are moving images in which the random dots themselves appear to be moving. In order to obtain such a moving image, a different dot pattern is used for each of the background random dot image and the square random dot image.
Two random dot patterns are provided. Then, for each image, four types of random dot patterns are sequentially switched and displayed at predetermined time intervals, thereby obtaining a moving image in which the dots of random dots are moving. These random dot patterns are stored on the hard disk 12.

An image displayed on the 3D display device 2 when the random dot test is performed will be described.

First, a random dot pattern for generating a background random dot image and a random dot pattern for generating a square random dot image are read from the hard disk 12 and stored in the memory 13.

Then, based on the images stored in the memory 13, a left-eye image and a right-eye image including a background image and a square image are generated. At this time, for a square image, the horizontal position of the image appearing in the left-eye image is the horizontal position of the image appearing in the right-eye image so that the background is the same image between the left-eye image and the right-eye image. , An image for the left eye and an image for the right eye are generated so as to shift to the right.

That is, as shown in FIG. 5, the image for the left eye is an image obtained by synthesizing the background image 81L and the square image 82L shifted to the right side from the reference position, and the image for the right eye is the background image 81R. , And a square image 82R at a position shifted leftward from the reference position. Here, the composite image means that the display portion of the square image in the background image is
Refers to an image replaced with a square image.

For a square image, an image for the left eye and an image for the right eye that change with time so as to reciprocate on the screen in the horizontal direction are generated. The moving cycle of the square image is
The adjustment can be made according to the cycle set by the examiner. The random dot patterns forming the background image and the square image are sequentially changed at predetermined time intervals using four types of random dot patterns prepared respectively.

The left-eye image and the right-eye image generated in this manner are each reduced by half in the horizontal direction to generate an image for one frame. The generated image for one frame is sent to the 3D display device 2 via the frame memory 16 and the D / A converter 18.

The 3D display device 2 decomposes the received left-eye reduced image and right-eye reduced image into vertically elongated strip images, respectively, and displays a left-eye strip image and a right-eye strip image on the liquid crystal panel 21. The strip images and the strip images are alternately arranged in the horizontal direction and displayed. Therefore, when a normal subject observes the image displayed on the liquid crystal panel 21, the square random dot image appears to move in the horizontal direction in a state of being raised with respect to the background.

Next, in the random dot test,
An image displayed on the 2D display 19 will be described.

In the random dot test, 3D
A two-dimensional image representing the movement of the stereoscopic image displayed on the display device 2 is displayed. In other words, based on the stereoscopic image (the left-eye image and the right-eye image) supplied to the 3D display device 2, as shown in FIG. 6, a two-dimensional moving image in which the movement of the square image protruding from the background surface can be obtained. It is displayed on the 2D display 19.

FIG. 7 shows the overall processing procedure by the CPU 11 during the random dot test.

First, when the moving cycle of the square image is set by the examiner (step 1), the moving cycle is stored in the memory 13 (step 2).

Next, a left-eye image and a right-eye image in which a square image reciprocates in a cycle corresponding to the set moving cycle are generated, and sequentially sent to the second frame memory 16 so that a 3D display is generated. A three-dimensional image is displayed on the device 2 such that the square random dot image moves in the horizontal direction in a state of being raised with respect to the background (step 3).

When such display is started, a voice guidance such as "Please follow the square random dot image with your eyes" is output to the subject through the speaker 4 (step 4).

Next, images from the CCD camera 3 are sequentially captured (step 5). FIG. 8 shows an example of a captured image. Based on the captured image, the eye movement of the subject is extracted (step 6). Then, the stereoscopic ability of the subject is determined based on the extracted eye movements of the subject (Step 7).

Specifically, for example, the period of the eye movement of the subject is measured based on the captured image, and the measured period of the eye movement of the subject and the period of the square random dot image are determined. If the two are substantially equal, it is determined that the stereoscopic function is normal. As a method of measuring the period of the eye movement of the subject, for example, a motion vector of the eye movement of the subject is measured, and the time when the motion vector becomes 0 and then the time when the motion vector becomes 0 next Measure the time sequentially until: An average of the times obtained a plurality of times in this way is obtained, and twice the average value is obtained as a cycle.

When it is determined that the subject's stereoscopic ability is normal, the fact is stored in the hard disk 12 and the current test is terminated (step 8). If it is determined that the subject's stereoscopic ability is abnormal, the fact is stored in the hard disk 12 and the current test is terminated (step 9).

In the random dot test, the background and the square image, which is the object to be stereoscopically viewed, are set as random dot images because the image displayed on the 3D display device 2 is viewed only with one eye. This is to prevent the object from being recognized.

The reason why the dots in the random dot image of the square image which is the background and the object to be stereoscopically viewed are moved even when the object to be stereoscopically viewed cannot be stereoscopically viewed when the object to be stereoscopically viewed is moved. This is to prevent the movement of the stereoscopic target object from being recognized. This principle is based on the principle that, for example, when a mole moves underground in a sandbox, the surface of the sandbox moves along the path of the sandbox, so the path of the mole can be known. For example, it will be understood from the fact that even when a mole moves underground, its path is not known.

In the above embodiment, a parallax barrier type display device is used as the 3D display device, but a 3D display device without other glasses such as a lenticular type may be used. Further, as the 3D display device, a 3D display device using polarizing glasses and liquid crystal shutter glasses together may be used.

The object to be stereoscopically viewed may be moved so as to draw a circle or an ellipse.

[0045]

According to the present invention, the examiner can automatically determine the stereoscopic function of the examinee without observing the eye movement of the examinee.

[Brief description of the drawings]

FIG. 1 is an external view showing the external appearance of a stereoscopic inspection apparatus.

FIG. 2 is a block diagram illustrating a configuration of a stereoscopic inspection apparatus.

FIG. 3 is a schematic diagram illustrating a configuration of a display unit of the 3D display device.

FIG. 4 is a schematic diagram illustrating an image supplied from a personal computer to a 3D display device and an image displayed on the 3D display device.

FIG. 5 is a schematic diagram illustrating a left-eye image and a right-eye image generated during a random dot test.

FIG. 6 is a schematic diagram showing a display screen of a 2D display during a random dot test.

FIG. 7 is a flowchart showing a processing procedure executed at the time of a random dot test.

FIG. 8 is a schematic diagram illustrating an example of a captured image of a CCD camera.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal computer 2 3D display device 3 CCD camera 11 CPU 12 Hard disk 13 Memory 14 Input device 15, 16 Frame memory 17, 18 D / A converter 19 2D display

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takeshi Takeshi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (8)

[Claims] 1. A three-dimensional display device in which a three-dimensional image composed of moving images of random dots moves on a background image composed of moving images of random dots.
Display means for displaying a three-dimensional image on a three-dimensional display device, an imaging device for imaging the eye movement of the subject, and information on the eye movement of the subject obtained based on the captured image of the imaging device. Determining means for determining whether or not the stereoscopic function of the subject is normal based on the stereoscopic inspection apparatus. 2. A three-dimensional display device, wherein a three-dimensional image in which a three-dimensional image composed of random-dot moving images moves periodically on a background image composed of random-dot moving images at a predetermined period is displayed on a three-dimensional display device. The determination unit measures the period of the eye movement of the subject based on the image captured by the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image. The stereoscopic inspection apparatus according to claim 1, wherein the apparatus determines whether or not the stereoscopic function of the subject is normal. 3. A three-dimensional display device for displaying a three-dimensional image in which a three-dimensional image composed of random-dot moving images reciprocates at predetermined intervals on a background image composed of random-dot moving images. The determination means measures the period of the eye movement of the subject based on the image captured by the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image to determine the position of the subject. The stereoscopic inspection apparatus according to claim 1, wherein the stereoscopic inspection apparatus determines whether or not the stereoscopic function of the user is normal. 4. The determination means measures the motion vector of the eye movement of the subject obtained by the imaging device, and determines the time from when the motion vector becomes 0 to when the next motion vector becomes 0. 4. The stereoscopic inspection apparatus according to claim 3, further comprising means for measuring time a plurality of times and measuring a period of the eye movement of the subject based on the measurement result. 5. A display function for displaying, on a three-dimensional display device, a three-dimensional image in which a three-dimensional image composed of random-dot moving images moves on a background image composed of random-dot moving images, and A determination function for determining whether or not the stereoscopic function of the subject is normal based on information related to the eye movement of the subject obtained based on the captured image of the imaging apparatus for capturing the eye motion; A computer-readable recording medium on which a stereoscopic inspection program for causing a computer to realize the above is recorded. 6. A display function is provided for displaying a three-dimensional image in which a three-dimensional image consisting of moving images of random dots moves periodically on a background image consisting of moving images of random dots at a predetermined period on a three-dimensional display device. The determination function measures the period of the eye movement of the subject based on the captured image of the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image. A computer-readable recording medium storing the stereoscopic inspection program according to claim 5, wherein the function is to determine whether or not the stereoscopic function of the subject is normal. 7. The display function displays on a three-dimensional display device a three-dimensional image in which a three-dimensional image composed of random dot moving images reciprocates at a predetermined cycle on a background image composed of random dot moving images. The determination function measures the period of the eye movement of the subject based on the image captured by the imaging device, and compares the measured period of the eye with the movement period of the stereoscopic image. A computer-readable recording medium recording the stereoscopic inspection program according to claim 5, wherein the recording medium is a function of determining whether or not a stereoscopic function of a user is normal. 8. The determining function measures a motion vector of the eye movement of the subject obtained by the imaging apparatus, and measures a motion vector from the time when the motion vector becomes 0 to the time when the motion vector next becomes 0. 8. A computer-readable recording recording the stereoscopic inspection program according to claim 7, further comprising a function of measuring time a plurality of times and measuring a period of an eye movement of the subject based on the measurement result. Medium.