JPH10161802A - Method and device for image display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability by moving the visual field direction of a display according to the movement of the gaze of an operator, and thus eliminating the need for manual operation in the visual-field direction and reducing misoperation. SOLUTION: The operator measures the head position, attitude, and gaze direction by a position detecting device 107 mounted on the head and an eyeball movement device 109 mounted on the side of a sharper eye 202. On the basis of their information, a gaze position and a gaze direction based upon the screen 205 of a display device 101 are calculated. Then the position of a projection surface for an expected display and the gaze direction are inputted and the coordinates of the gaze position is converted on the basis of the coordinate system of a virtual three-dimensional space into the coordinates of a projection origin. Then the angle between the axis extending from the center of the display screen 205 at right angles and the gaze is calculated and on the basis of the angle of gaze deflection, a displacement quantity is calculated to displace the direction of the visual field. On the basis of the position relation between the projection origin and projection surface, an image of three-dimensional shape data is generated by a perspective projection method and displayed on the image display device 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display method and apparatus, and more particularly, to geometric figure data defined by a computer in a three-dimensional space such as fonts, plane figures, and three-dimensional shapes, and attribute data such as colors and patterns. The present invention relates to an image display method and apparatus for calculating, generating and displaying an image by interpreting scene description data such as data relating to lighting and data relating to projection.

[0002]

2. Description of the Related Art Generally, in an image display method and apparatus for visualizing and displaying geometric figure data defined in a three-dimensional space, it is necessary to designate a direction of a visual field to be visualized and a position of a projection origin. Conventionally, to specify the direction of the field of view and the position of the projection origin, a mouse, joystick,
A keyboard, a trackball, a controller composed of a plurality of button switches, and the like were operated up, down, left, and right by hand.

[0003]

In the conventional method as described above, when the moving operation in the viewing direction and the moving operation of the projection origin are to be performed at the same time, two input devices must be operated simultaneously with both hands. Therefore, when it is necessary to perform operations other than those described above, it is necessary to move the hand to another input device each time and operate it, causing confusion for the operator and increasing the number of erroneous operations in applications requiring quick operation There were drawbacks. In addition, in order to perform the operation of moving the viewing direction and the operation of moving the projection origin with one input device, it is necessary to invalidate some of the total 6 degrees of freedom of the viewing direction and the projection origin position, or use a switch. It was necessary to switch between movement in the direction and movement in the projection origin.

In view of the above problems, the present invention eliminates the need for the operator to manually operate the visual field direction by moving the visual field direction to be displayed by the movement of the visual axis of the operator. The erroneous operation is reduced by an intuitive operation of moving the viewing direction in the space in the moving direction of, that is, moving the line of sight to the right, the displayed viewing direction also moves to the right, thereby providing better operability. It is the purpose.

Further, the present invention has been made to solve the above-mentioned drawbacks, and the operator manually operates the visual field direction by moving the visual field direction to be displayed by the movement of the operator's line of sight. It is an object of the present invention to provide an image display method and apparatus that eliminates the necessity and reduces erroneous operations by an intuitive operation of moving a visual field direction in a space in a moving direction of an operator's line of sight, thereby providing better operability. And

[0006]

In order to solve the above-mentioned problems, in an image display method according to the present invention, a direction of a line of sight of an operator observing a display screen is input as a reference direction of the display screen. A gaze direction input step, a viewpoint position input step of inputting a position of a viewpoint of an operator observing the display screen as a reference position of the display screen, a center axis of the display screen, and an input in the gaze direction input step A line-of-sight declination deriving step for deriving a line-of-sight declination formed by the direction of the operator's line of sight, a position of the viewpoint of the operator input in the viewpoint position inputting step, and a virtual three-dimensional image to be displayed. A center point deriving step of deriving a projection center point in a virtual three-dimensional space to be displayed based on a center position and a direction of a projection plane corresponding to the display screen in space; In based on the derived line-of-sight angle of deviation,
A direction displacement step of displacing the direction of the projection plane determined in the projection plane direction determination step, and a direction of the projection plane displaced in the direction displacement step around the center point derived in the center point derivation step. An image generating step of generating an image, and an image displaying step of displaying the image generated in the image generating step on the display screen.

In order to solve the above-mentioned problems, in an image display device according to the present invention, a gaze direction input means for inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen. A viewpoint position input means for inputting a position of a viewpoint of an operator observing the display screen as a reference position of the display screen, a central axis of the display screen, and an operator input by the gaze direction input means Gaze declination deriving means for deriving a gaze declination formed by the direction of the gaze, a position of a viewpoint of the operator input by the viewpoint position input means, and the display in a virtual three-dimensional space to be displayed. A center point deriving unit that derives a projection center point in a virtual three-dimensional space to be displayed based on a center position and a direction of a projection plane corresponding to a screen; A direction displacement unit for displacing the direction of the projection plane determined by the projection plane direction determination unit based on the line-of-sight declination derived from the direction, and the direction centering on a center point derived by the center point derivation unit. An image generating means for generating an image in the direction of the projection plane displaced by the displacing means, and an image display means for displaying the image generated by the image generating means on the display screen are provided.

[0008]

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

(Embodiment 1) In an image generating and displaying apparatus according to Embodiment 1, a position and orientation detecting device mounted on an operator's head and an eye movement detecting device mounted on the dominant eye side of the operator are described. Then, the position and posture of the head and the line of sight of the dominant eye are measured and input. Then, based on these pieces of information, the viewpoint position and the line-of-sight direction of the dominant eye are calculated based on the screen of the display device. This viewpoint position corresponds to the projection origin when generating an image.

Next, the position of the projection plane in the three-dimensional space on the computer to be displayed and the direction of the visual field are input.
This projection plane corresponds to the screen of the image display device.

The coordinates of the viewpoint position are converted from the position and direction of the projection plane into an expression based on the coordinate system of the three-dimensional space defining the figure to be displayed, and are set as the coordinates of the projection origin.

The angle between the axis extending in the vertical direction from the center of the screen of the image display device and the line of sight is calculated in each of the horizontal and vertical directions, and this is defined as the line of sight deviation.

A monotonically increasing function using the line-of-sight declination as a variable is calculated, and the direction of the visual field is displaced by using the value based on the calculation result as the amount of displacement.

Then, based on the positional relationship between the projection origin and the projection plane determined above, an image of three-dimensional shape data is generated by the perspective projection method and displayed on the image display device.

Hereinafter, the operation of the three-dimensional image display device according to the first embodiment will be described in offset.

FIG. 1 is a block diagram showing a basic configuration of the image generating and displaying apparatus according to the first embodiment.

In FIG. 1, reference numeral 101 denotes an image display device for presenting an image to an operator, and comprises a CRT display device, an LCD display device, and the like.

Reference numeral 102 denotes a frame buffer, which stores image data to be displayed on the image display device 101.

Reference numeral 103 denotes an arithmetic unit, and the storage device 10
4 executes processing according to the processing procedure stored in the storage unit 4, generates image data, and controls each device. The image data generated by the arithmetic unit 103 is stored in the frame buffer 102.

Reference numeral 104 denotes a storage device for storing a processing procedure of the arithmetic unit 103 and information necessary for the processing.
A storage area for calculation work required for the processing of the arithmetic unit 103 is also provided.

The storage device 104 stores a control program represented by a flowchart described later with reference to FIG. 3, data relating to a figure to be drawn, and data used for processing.

Numeral 105 denotes a head position measuring device, which analyzes a signal from the position / posture detecting device 107 and calculates information on the position and posture of the operator's head with reference to the reference signal generating device 106. To enter.

Reference numeral 106 denotes a reference signal generator for generating a signal serving as a reference for the position and orientation detector 107.

Reference numeral 107 denotes a position and orientation detection device for detecting the position and orientation of the head.

Reference numeral 108 denotes a gaze direction measuring device which analyzes a signal from the eye movement detecting device 109 and inputs information on a dominant gaze direction based on the head to the arithmetic unit 103.

An eye movement detecting device 109 detects which direction the dominant eye of the operator is facing.

Reference numeral 110 denotes an interactive input device, which specifies the position of the projection origin when operated by an operator. Any device that can be input by the operator in real time, such as a mouse, a keyboard, a dial box, a trackball, and a three-dimensional position sensor, may be used.

FIG. 2 is a diagram showing a schematic arrangement of devices constituting the image generating and displaying apparatus according to the first embodiment.

In FIG. 2, reference signal generator 10
6 is fixed to the upper part of the image display device 101. The reference signal generator 106 may be arranged by another method of fixing the position relatively to the image display apparatus 101. For example, the reference signal generator 106 can be fixed on a table on which the image display device 101 is fixed.

The surface of the image display device 101 on the operator side is an image display surface 205, and the operator views the image display surface 205 through a spectacle frame-shaped detection device fixing support 204. Will be.

The position and orientation detection device 107 and the eye movement detection device 109 are fixed to the operator's head by detection device fixing supports 204. Eye movement detection device 109
Is mounted on the front of the eyeball on the dominant eye 202 side of the operator.

The other devices shall be located at any suitable location.

FIG. 3 is a diagram showing the detector fixing supports 204. The position and orientation detection device 107 is mounted at the upper center of the eyeball frame, and the eyeball motion detection device 109 is mounted below the frame on the dominant eye side of the operator.

FIG. 4 is a flowchart showing the flow of the image generation and display process according to the first embodiment. The processing shown in the flowchart in this embodiment is performed by the storage device 104.
Is performed by the arithmetic device 103 executing the information stored in the.

The details of the processing in each step will be described in order.

First, in step S401, the head position measuring device 105 measures the position and orientation of the position and orientation detecting device 107 based on the position and orientation of the reference signal generating device 106. Screen 20
Convert to a value based on 5. This conversion is performed based on a coordinate system as shown in FIG. Further, as described with reference to FIG. 2 regarding the arrangement of the detection devices, the reference signal generator 106 is fixed relative to the image display device 101, so that the image display device 101 and the reference signal generator By measuring in advance the relative positional relationship with respect to the position 106, it is possible to calculate the position and orientation based on the image display device screen 205.

Next, in step S402, the viewpoint position 503 of the dominant eye 202 of the operator is calculated based on the image display device screen 205. First, the viewpoint position 503
The relative coordinate values based on the position and orientation of the position and orientation detection device 107 are stored in advance as offsets, and these offsets are added to the position coordinates of the position and orientation detection device 107 obtained in step S401. Thus, the viewpoint position 503 is determined. Display screen 2
The relationship between the coordinate system 05 and the viewpoint position 503 is as shown in FIG.

Next, in step S403, the signal from the eye movement detecting device 109 is converted to the gaze direction measuring device 108.
A gaze direction 504 based on the image display device screen 205 is calculated based on the vector information analyzed in step S401 and the posture information of the operator's head obtained in step S401. The relationship between the coordinate system of the display device screen 205 and the viewpoint direction 504 is as shown in FIG.

Next, in step S404, the angle formed by the line-of-sight direction 504 and the central axis 502 of the display device screen is determined in the horizontal direction and the vertical direction of the display device screen, and this is defined as the visual line declination 601. That is, the line-of-sight declination 601
Has a horizontal component and a vertical component. Gaze direction 5
FIG. 6 shows the relationship between the central axis 04, the central axis 502 of the display device screen, and the line-of-sight declination 601.

Next, in step S405, the center position of the projection plane corresponding to the display screen 205 is specified in a virtual three-dimensional space to be displayed, and this is set as a reference projection plane position 703. This is specified by the operator operating the interactive input device 101, but may be fixedly instructed in advance.

Next, in step S406, the direction of the visual field, which is the direction of the projection plane corresponding to the display screen 205, is specified in the virtual three-dimensional space to be displayed. I do. This is specified by the operator operating the interactive input device 101, but may be fixedly instructed in advance.

Next, in step S407, the reference projection plane position 703 determined in steps S405 and S406
And the viewpoint position 503 based on the reference viewing direction 702 and
It is converted into a coordinate expression in a virtual three-dimensional space to be displayed, and this is set as a projection origin 704. Viewpoint position 50
3 is a coordinate expression relative to the display device screen;
This conversion is self-evident because the display screen corresponds to the projection plane.

FIG. 7 shows steps S405, S406, S
The positional relationship between the reference projection plane position 703, the reference viewing direction 702, and the projection origin 704 determined in 407 is shown.

Next, in step S408, each of the horizontal and vertical directions is calculated by a monotone increasing function as shown in FIG. 8 using the horizontal and vertical line-of-sight deflection angles 601 calculated in step S404 as variables. View angle 80
1 is calculated. Here, a function other than the linear function may be used as the monotonically increasing function. Further, the gradient of the monotonically increasing function may be arbitrarily adjusted.

Next, in step S409, the vector in the reference viewing direction 702 determined in step S406 is displaced by the viewing angle 601 determined in step S408 to obtain a vector in the viewing direction 901. FIG. 9 shows this state. In the displacement of the direction vector, the vertical direction component and the horizontal direction component of the viewing angle are applied to each component of the direction vector to be displaced.

Next, in step S410, the center position of the projection plane is rotated by the viewing angle 601 obtained in step S408 with the projection origin 704 as the center of rotation. FIG. 10 shows this state. Step S409 and Step S
By 410, the position and direction of the projection plane are rotated about the projection origin 704.

Next, in step S411, geometric transformation is performed based on the perspective projection method, using the position of the projection plane and the direction of the field of view determined in steps S409 and S410 and the position of the projection origin determined in step S407 as parameters. An image projected on the projected plane 1002 is generated. As the image generation method, any known method such as a ray tracing method or a scan line algorithm can be used. The generated image data is stored in the frame buffer 102.

The three-dimensional graphic data is stored in the storage device 104 in a format as shown in FIG. Each figure data item in the figure data list contains the figure data identification number,
It consists of the type of figure and the figure data itself.

Next, in the gaze cursor drawing process of step S412, as shown in FIG.
A gazing point cursor indicating the gazing point is superimposed and drawn at the position of the gazing point 1201 where the line of sight 05 intersects the viewing direction 504. Care should be taken to select small figures and characters with colors and shapes that are easy to distinguish from the background. In the first embodiment, a cross-shaped yellow gaze cursor is employed.

Then, in the image table processing in step S413, the image stored in the frame buffer 102 and the image display device 101 are presented.

Finally, in step S414, it is determined whether or not there is an operator's instruction to end the image generation and display processing. If there is no end instruction, the processing from step S401 is repeated. If there is a termination instruction, the processing is terminated.

By the processing described above, an image as specifically described below is obtained.

Here, a case where an image of the shape data of a Japanese-style room is generated and displayed is shown.

When the operator's line of sight is substantially perpendicular to the display device screen as shown in FIG. 12, the direction of the projection plane substantially coincides with the reference visual field direction 702 as shown in FIG. The image at this time is shown in FIG.

At this time, when the operator's line of sight is moved to the left side of the screen as shown in FIG. 15, the direction of the visual field displayed correspondingly is also moved to the left side as shown in FIG. As a result, an image as shown in FIG. 17 is obtained.

This time, when the operator's line of sight is moved to the right side of the screen as shown in FIG. 18, the direction of the visual field displayed correspondingly is also moved to the right side as shown in FIG.
As a result, an image as shown in FIG. 20 is obtained.

As described above, by detecting the direction of the line of sight and changing the direction of the field of view in conjunction with the movement,
The direction of the field of view to be displayed can be moved up, down, left, and right only by moving the line of sight up, down, left, and right without operating the interactive input device by hand.

As a result, the direction of the field of view can be freely moved only by causing an intuitive action of moving the line of sight, so that the operability is improved. Further, the number of input devices manually operated for moving the visual field can be reduced, so that operability is improved.

(Embodiment 2) FIG. 21 shows a basic configuration in Embodiment 2 of the present invention. The basic configuration of the second embodiment is different from the basic configuration of the first embodiment in that the eye movement detecting device 1
09 and the gaze direction measuring device 108 are omitted.

FIG. 22 shows a schematic arrangement of devices in the second embodiment. The arrangement of the detection devices of the second embodiment is such that the eye movement detection device 109 is removed from the detection device fixing support 204 of the first embodiment, and the gaze direction measurement device 108 is excluded.

A flow chart showing the flow of the image generation and display processing in the second embodiment is shown in FIG. 4 similarly to the first embodiment, and the details of the processing in all steps except step S403 are described in the first embodiment. Is the same as

In the second embodiment, the actual line-of-sight direction is not measured.
The head posture determined in step 1 is used. That is, it is assumed that the operator is looking straight ahead at the head front direction, and substitutes the head front direction as the line-of-sight direction.

By moving the front direction of the head up, down, left and right instead of the line of sight, the direction of the visual field to be displayed also moves up, down, left, and right, and the same effect as in the first embodiment can be obtained.

(Embodiment 3) FIG. 23 shows a basic configuration according to Embodiment 3 of the present invention. The basic configuration of the third embodiment is the same as the basic configuration of the first embodiment except that the image display device 1
01 is replaced with a stereoscopic image display device 2301.

The stereoscopic image display device 2301 is a display device for presenting a stereoscopic image to an operator, and includes a CRT display device having a stereoscopic display mechanism, an LCD display device, and the like. As the stereoscopic display mechanism, any of a lenticular method, a time division method using circularly polarized light, a time division method using a liquid crystal shutter, and the like may be used.

FIG. 24 shows a schematic arrangement of devices in the third embodiment. In the arrangement of the detection devices of the third embodiment, the image display device 101 of the first embodiment is replaced with a three-dimensional image display device 2301, and the detection device fixing support 204 of the first embodiment is replaced with a three-dimensional image. Display device 2301
Is replaced with a stereoscopic glasses / detection device fixing support 2401 provided with a mechanism for stereoscopically observing the image presented by. The mechanism for stereoscopic observation depends on the type of the selected stereoscopic image display device 2301. However, in the case of the lenticular method, 2301 does not include a stereoscopic observation mechanism.

Here, the stereoscopic glasses / detection device fixing support 2401 uses, for example, liquid crystal shutter glasses 2501 for stereoscopic viewing as shown in FIG.
There is one using stereoscopic polarized glasses 2601 as shown in FIG.

FIG. 4 is a flowchart showing the flow of the image generation and display process according to the third embodiment, similarly to the first embodiment. However, in step S411, a single image is generated in the first embodiment, but in the third embodiment, two images are generated in consideration of the parallax between the left and right eyes.

As described above, the present invention can be applied to an image display device that generates and displays a stereoscopic image.

Further, the present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. Needless to say, the present invention is also applicable to a case where the present invention is implemented by supplying a program to a system or an apparatus. In this case, the storage medium storing the program according to the present invention constitutes the present invention. Then, by reading the program from the storage medium to a system or an apparatus, the system or the apparatus operates in a predetermined method.

[0071]

As described above, according to the present invention,
Since the direction of the visual field to be displayed in the virtual three-dimensional space can be moved based on the movement of the visual line direction of the operator, it is not necessary for the operator to manually operate the visual field direction. The intuitive operation of moving the visual field direction in the space in the moving direction of the line of sight reduces the erroneous operation and has the effect of realizing better operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a schematic arrangement of detection devices according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a detection device fixing support according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a flow of a process according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating a positional relationship between a viewpoint and a line of sight of an operator and an image display surface according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a line-of-sight declination according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a projection plane and a viewing direction according to the first embodiment of the present invention.

FIG. 8 is a diagram illustrating calculation of a line-of-sight declination in the first embodiment of the present invention.

FIG. 9 is a diagram for explaining displacement in a viewing direction according to the first embodiment of the present invention.

FIG. 10 is a diagram illustrating rotation of a projection plane.

FIG. 11 is a diagram illustrating an example of the contents of graphic data.

FIG. 12 is a diagram showing a state in which the line of sight is substantially perpendicular to the display device screen.

FIG. 13 is a diagram illustrating a direction of a visual field in a state where a line of sight is substantially perpendicular to a display device screen.

FIG. 14 is a diagram illustrating a generated image in a state where the line of sight is substantially perpendicular to the display device screen.

FIG. 15 is a diagram showing a state in which the line of sight is directed to the left side of the display device screen.

FIG. 16 is a diagram illustrating the direction of the visual field in a state where the line of sight is directed to the left side of the display device screen.

FIG. 17 is a diagram showing a generated image in a state where the line of sight is directed to the left side of the display device screen.

FIG. 18 is a diagram showing a state in which the line of sight is directed to the right side of the display device screen.

FIG. 19 is a diagram showing the direction of the visual field in a state where the line of sight is directed to the right side of the display device screen.

FIG. 20 is a diagram illustrating a generated image in a state where the line of sight is directed to the left side of the display device screen.

FIG. 21 is a block diagram showing a basic configuration according to Embodiment 2 of the present invention.

FIG. 22 is a diagram showing a schematic arrangement of detection devices according to the second embodiment of the present invention.

FIG. 23 is a block diagram showing a basic configuration of a third embodiment of the present invention.

FIG. 24 is a diagram showing a schematic arrangement of detection devices according to the third embodiment of the present invention.

FIG. 25 is a diagram showing a stereoscopic glasses / detection device fixing support according to the third embodiment of the present invention.

FIG. 26 is a diagram showing another example of a fixing support for stereoscopic glasses and detection devices according to Embodiment 3 of the present invention.

[Explanation of symbols]

 Reference Signs List 101 stereoscopic image display device 102 frame buffer 103 arithmetic device 104 storage device 105 head position measuring device 106 reference signal generating device 107 position and orientation detecting device 108 gaze direction measuring device 109 eye movement detecting device 110 interactive operation input device 204 fixing of detecting devices Support

Claims (19)

[Claims] A gaze direction input step of inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen; and a position of a viewpoint of the operator observing the display screen, A viewpoint position inputting step of inputting as a reference position, a gaze declination deriving step of deriving a gaze deviation formed by a center axis of the display screen and a direction of the gaze of the operator input in the gaze direction input step. The display is performed based on the position of the operator's viewpoint input in the viewpoint position input step and the center position and direction of the projection plane corresponding to the display screen in the virtual three-dimensional space to be displayed. A center point deriving step of deriving a projection center point in a virtual three-dimensional space, and a projection plane determined in the projection plane direction determining step based on the line-of-sight declination derived in the line-of-sight declination deriving step. of A direction displacement step of displacing a direction, an image generation step of generating an image in a direction of the projection plane displaced in the direction displacement step around the center point derived in the center point derivation step, and the image generation An image display step of displaying an image generated in the step on the display screen. 2. The image display method according to claim 1, wherein in the line-of-sight direction input step, the direction of the line of sight of the dominant eye of the operator observing the display screen is input. 3. The image display method according to claim 1, wherein in the line-of-sight direction input step, a front direction of an operator's head is input as a reference direction of the display screen. 4. The image display method according to claim 1, wherein in the viewpoint position input step, a position of a viewpoint on a dominant eye side of an operator observing the display screen is input. 5. In the line-of-sight declination deriving step, a line-of-sight declination between the central axis of the display screen and the direction of the line of sight of the operator input in the line-of-sight direction input step is defined as a vertical direction and a horizontal direction. 2. The image display method according to claim 1, wherein the method is derived for each of them. 6. In the direction displacement step, the direction of the projection plane determined in the projection plane direction determination step is displaced by a monotonically increasing function using the line-of-sight deflection angle derived in the line-of-sight deflection derivation step as a variable. The image display method according to claim 1, wherein: 7. The image display method according to claim 1, wherein in the image generating step, an image of a three-dimensional geometric figure is generated. 8. The image display method according to claim 1, wherein in the image generation step, an image is generated based on a perspective projection method. 9. A gaze direction input means for inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen, and a position of a viewpoint of the operator observing the display screen, Viewpoint position input means for inputting as a reference position, a gaze declination deriving means for deriving a gaze declination between a central axis of the display screen and a direction of a gaze of the operator input by the gaze direction input means, The position of the operator's viewpoint input by the viewpoint position input means and the center position and direction of the projection plane corresponding to the display screen in the virtual three-dimensional space to be displayed; A center point deriving unit for deriving a projection center point in a virtual three-dimensional space; and a gaze declination derived by the gaze declination deriving unit. And direction displacement means for displacing the direction of the projection surface which is, in the direction of the projection plane which is displaced by the direction displacement means around a center point derived by the center point deriving means,
An image display device comprising: an image generation unit that generates an image; and an image display unit that displays an image generated by the image generation unit on the display screen. 10. The image display device according to claim 9, wherein said line-of-sight direction input means inputs a line-of-sight direction of a dominant eye of an operator who observes the display screen. 11. The image display device according to claim 9, wherein said line-of-sight direction input means inputs a frontal direction of an operator's head as a reference direction of said display screen. 12. The image display device according to claim 9, wherein the viewpoint position input means inputs a position of a viewpoint on a dominant eye side of an operator who observes the display screen. 13. The line-of-sight declination deriving unit calculates a line-of-sight declination between a central axis of the display screen and a direction of a line of sight of an operator input by the line-of-sight direction input unit in a vertical direction and a horizontal direction. The image display device according to claim 9, wherein each image is derived. 14. The direction displacing means displaces the direction of the projection plane determined by the projection plane direction determining means by a monotonically increasing function having the line-of-sight declination derived by the visual line declination deriving means as a variable. 10. The method according to claim 9, wherein
The image display device as described in the above. 15. The image display device according to claim 9, wherein said image generating means generates an image of a three-dimensional geometric figure. 16. The image display device according to claim 9, wherein said image generation means generates an image based on a perspective projection method. 17. A gaze direction inputting step of inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen, and a position of a viewpoint of the operator observing the display screen is displayed on the display screen. A viewpoint position inputting step of inputting as a reference position, a gaze declination deriving step of deriving a gaze deviation formed by a center axis of the display screen and a direction of the gaze of the operator input in the gaze direction input step. The display is performed based on the position of the operator's viewpoint input in the viewpoint position input step and the center position and direction of the projection plane corresponding to the display screen in the virtual three-dimensional space to be displayed. A center point deriving step of deriving a projection center point in a virtual three-dimensional space, and a projection plane determined in the projection plane direction determining step based on the line-of-sight declination derived in the line-of-sight declination deriving step. A direction displacement step of displacing a direction; an image generation step of generating an image in a direction of the projection plane displaced in the direction displacement step around the center point derived in the center point derivation step; A computer-readable storage medium storing a program having an image display step of displaying an image generated in the step on the display screen. 18. A gaze direction input step of inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen, a center axis of the display screen, and a gaze direction input step. A line-of-sight declination deriving step of deriving a line-of-sight declination between the direction of the operator's line of sight, and a projection determined in the projection plane direction determining step based on the line-of-sight declination derived in the line-of-sight declination derivation step. A direction displacement step of displacing the direction of the surface, an image generation step of generating an image in the direction of the projection plane displaced in the direction displacement step, and an image generated in the image generation step on the display screen. An image display step of displaying the image. 19. A gaze direction input unit for inputting a gaze direction of an operator observing a display screen as a reference direction of the display screen, a center axis of the display screen, and a gaze direction input unit. A line-of-sight declination deriving unit that derives a line-of-sight declination between the direction of the line of sight of the operator, and a projection determined by the projection plane direction determining unit based on the line-of-sight declination derived by the line-of-sight declination deriving unit. Direction displacement means for displacing the direction of the surface, image generation means for generating an image in the direction of the projection surface displaced by the direction displacement means, and an image generated by the image generation means on the display screen. An image display device comprising: an image display means for displaying.