JP4042356B2 - Image display system and image correction service method for image display system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image display system that projects an image on a screen, in particular, an image display system with a wide viewing angle that realizes a high level of realism and scale, and a related art. Painting The present invention relates to a correction service method for an image display system.
[0002]
[Prior art]
Conventionally, various apparatuses for displaying images have been commercially available and proposed. For example, although it is difficult to display a user's own limbs or another user without a sense of incongruity, a head-mounted display that obtains a wide viewing angle by displaying an image in the vicinity of the user's eyeball is commercially available. In addition, there is a video that expresses a stereoscopic effect by separately displaying images with parallax on the left and right eyes.
[0003]
In addition, a large flat screen, a polyhedral screen that combines multiple flat screens into a polyhedral shape, an arch-shaped screen, or a concave surface (parabolic surface) to express a high level of realism and scale close to the real world. An image display system that covers a wide field of view of the user by using various shapes of screens such as) -shaped screens has been developed.
[0004]
In Japanese Patent Laid-Open No. 10-200246, the azimuth angle, the tilt angle, and the distance of the projection plane are calculated to obtain the three-dimensional shape of the projection plane, and the tilt correction for the input original image corresponding to the shape of the projection plane is performed. And a projector apparatus that performs enlargement / reduction correction and projects and outputs the corrected image.
[0005]
[Problems to be solved by the invention]
In the case of an image display system that covers the user's visual field using the screens of various shapes described above, when a computer-generated CG image or an image from a live-action video is displayed, the shape of the screen system, distortion of the lens system, etc. Thus, an image having a distortion different from the image originally intended to be presented in the user's field of view is displayed. For this reason, when installing the screen system, it is necessary to perform a correction operation in which the viewpoint position of the user is also fixed, the distortion added to the image to be displayed is derived from the positional relationship and the like, and the distortion in the reverse direction is added. However, this work is very troublesome. Further, when the user's viewpoint moves, it is not easy to present an image with a wide viewing angle such that this troublesome work is required again.
[0006]
The present invention has been made in view of the above points, and an image display system capable of correcting distortion generated in an image on a screen of various shapes with a simple operation. Mu And an image correction service method for an image display system.
[0007]
[Means for Solving the Problems]
An image display system according to claim 1 for solving the above-described problem, a marker means for displaying an image of an optical pattern arranged near the base point of the line of sight, a projection means for projecting an image, A screen optically positioned between a base point of the line of sight and the projection means, and an image displayed by the marker means and the projection means; and an optical axis set coaxially with the optical axis of the projection means, on the screen An image pickup means for picking up an image, and a calculation means for correcting distortion generated in the image on the screen observed from the base point of the line of sight based on the image picked up by the image pickup means And
[0008]
According to a second aspect of the present invention, in the image display system according to the first aspect, the projection unit projects a live-action video image or an interactive CG image on the screen.
[0009]
According to a third aspect of the present invention, in the image display system according to the first or second aspect, the marker means is provided near both eyes of the observer.
[0010]
A fourth aspect of the present invention is the image display system according to any one of the first to third aspects, wherein the marker means displays an image of the optical pattern on the screen using non-visible light. And
[0011]
According to a fifth aspect of the present invention, in the image display system according to any one of the first to fourth aspects, the marker means blinks and displays the image of the optical pattern on the screen.
[0012]
The invention according to claim 6 is the image display system according to any one of claims 1 to 5, wherein the calculation means uses an optical pattern of an image by the marker means imaged by the imaging means, The distortion in the vicinity of the observer's viewpoint is corrected more preferentially than the distortion in the surrounding area.
[0013]
A seventh aspect of the present invention is the image display system according to any one of the first to sixth aspects, further comprising display surface deformation means for deforming the display surface of the screen, wherein the computing means is on the screen. Said The distortion generated in the image on the screen is corrected by correcting the data of the image projected by the projection unit and deforming the display surface of the screen through the display surface deformation unit so that the distortion generated in the image is reduced. It is characterized by correcting.
[0014]
According to an eighth aspect of the present invention, in the image display system according to any one of the first to seventh aspects, a plurality of the projection means are provided, and images projected from the plurality of projection means are combined and projected onto the screen. It is characterized by being.
[0015]
According to a ninth aspect of the present invention, in the image display system according to any of the first to eighth aspects, a plurality of the marker means are provided for a plurality of observers.
[0016]
According to a tenth aspect of the present invention, in the image display system according to the ninth aspect, the plurality of marker units display images of optical patterns that are individually color-coded on the screen.
[0018]
Claim 11 According to the present invention, in the image display system according to any one of claims 1 to 10, a processing function for correcting distortion caused by the calculation unit is provided in a server connected to a network, and the remaining part is provided in the network. A correction service method for an image display system that is provided and executed on a connected client side, wherein the client creates transmission data based on an image captured by the imaging unit, and transmits the transmission data to the server. Transmitting via the network, and the server creates data for correcting distortion generated in the image on the screen observed from the origin of the line of sight based on the transmission data transmitted from the client And providing the data to the client via the network. And features.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 is a block diagram of an image display system, and a first embodiment according to the present invention will be described with reference to this figure.
[0020]
The image display system shown in FIG. 1 is arranged near the base point of the line of sight A, a marker 1 for displaying an image of an optical pattern, a projection device 2 for projecting the image, and the optical point of reference of the line of sight. A screen 3 positioned between the projector 2 and an image displayed by the marker 1 and the projector 2 and an optical axis set coaxially with the optical axis B of the projector 2 to capture an image on the screen 3 An imaging device 4 and a computer 5 for correcting distortion generated in an image on the screen 3 observed from the base line of sight based on the image captured by the imaging device 4 are provided. Hereinafter, specific examples of these parts will be described with reference to the drawings.
[0021]
2 and 3 show specific examples of the installation locations of the markers in FIG. In the example of FIG. 2, the marker 1 is arranged as the marker 11 near the base point of the line of sight of the person sitting on the seat 100 above the back of the seat 100. In the example of FIG. 3, the plurality of markers 12 are provided on the glasses-type frame 101. Here, for convenience of explanation, it is assumed that the marker 1 is the latter.
[0022]
4 to 7 show examples of optical patterns of images displayed on the screen by the markers shown in FIG. In the example of FIG. 4, the image C1 forms a pattern composed of a plurality of points C11 that form a planar lattice. In the example of FIG. 5, the image C2 forms a pattern composed of a plurality of lines C21 connecting the points constituting the planar grid. In the example of FIG. 6, a pattern composed of a plurality of continuous polygons C <b> 31 (in FIG. 6, a planar honeycomb structure) is formed by the image C <b> 3. In the example of FIG. 7, a pattern in which the vicinity of the center is dense and the peripheral part is sparse is formed by the image C4, which is a modification of the pattern based on the previous image C2. This is an example of an effective pattern when correcting distortion near the observer's viewpoint more heavily than distortion at the periphery. In this case, the correction processing performance can be improved and a smooth experience is possible. It becomes. Here, for convenience of explanation, it is assumed that the marker 1 displays the image C2 in the example of FIG.
[0023]
8 to 10 show specific structural examples of the screen of FIG. In the example of FIG. 8, the screen 3 is formed as a screen 31 having a concave (parabolic) shape. In the example of FIG. 9, it is formed as an arch-shaped screen 32. In the example of FIG. 10, a polyhedral screen 33 is formed by combining a plurality of flat screens 331 into a polyhedral shape. The screen 3 may be either a reflection type or a transmission type, but the arrangement of each device differs depending on the screen 3 as follows.
[0024]
FIG. 11 to FIG. 14 show examples of the arrangement configuration of each device suitable for the transmission / reflection type when the screen of FIG. 1 is a concave screen. In the example of FIG. 11, a reflective concave screen 31a is used, and a person wearing the frame 101 provided with the marker 12 is positioned in front of the screen 31a in the reflection direction. In addition, the projection / imaging device 6 formed integrally with the projection device 2 and the imaging device 4 is arranged so that its optical axis is not covered by a person in front. The example of FIG. 12 uses a transmissive concave screen 31b, and a person wearing the frame 101 provided with the marker 12 is located on the curvature center side of the screen 31b. Thus, the projection / imaging device 6 is disposed on the side opposite to the center of curvature. The example of FIG. 13 is a modification of the example of FIG. 12, and has an arrangement configuration in which a mirror 7 is interposed in the optical path between the screen 31 b and the projection / imaging device 6 in order to reduce the installation space. The example of FIG. 14 is a modification of the example of FIG. 12, in which the display area for the screen 31 b is divided, and the projection / imaging device 6 and the computer 5 are used for each divided display area. It has become.
[0025]
11 to 14, the computer 5 exchanges signals with the projection / imaging device 6 so that the computer 5 can process the image from the projection / imaging device 6 and perform a calculation to correct the projection image. Connected as possible. In addition, the projection device 2 and the imaging device 4 are integrally configured as the projection / imaging device 6, but are not necessarily configured integrally, and may be configured so that their optical axes coincide with each other. Further, when there are a plurality of people, that is, observers, as shown in FIG. 15, a frame 101 provided with a marker 12 is attached to each observer.
[0026]
FIG. 16 is a diagram showing an example of an optical pattern of an image obtained by imaging of the projection / imaging device when the marker displays the image of FIG. 5 on the screen, and FIG. 17 shows the image of FIG. 5 on the screen. Projecting / imaging when the projection / imaging device displays a corresponding image (an image including horizontal and parallel line components if the image by the marker includes horizontal and parallel line components) on the screen. It is a figure which shows the example of the optical pattern of the image obtained by imaging of an apparatus. In these drawings, the screen 3 is drawn with a flat screen for convenience of illustration.
[0027]
In the case of FIG. 16, the optical pattern D by the marker 1 is displayed distorted by the unevenness of the display surface of the screen 3. In the case of FIG. 17, the optical pattern D by the marker 1 and the optical pattern E by the projection / imaging device 6 are displayed distorted due to the unevenness of the display surface of the screen 3 and the distortion of the optical system. For this reason, in the first embodiment, the distortion is corrected as follows.
[0028]
18 is an explanatory diagram of distortion correction, FIG. 19 is a diagram showing an example of a distortion correction processing procedure executed by the computer of FIG. 1, and FIG. 20 is an explanatory diagram of the effect of distortion correction.
[0029]
Here, as shown in FIG. 18, in the case of FIG. 17, the mixed pattern of images obtained by imaging by the projection / imaging device 6 is changed into an optical pattern by the marker 1 and an optical pattern by the projection / imaging device 6. Disassemble the optical pattern by the projection / imaging device 6 so that it is similar to the optical pattern by the marker 1 (if both optical patterns have the same size at the same position in the virtual space, they completely match) As described above, the transformation operation is executed by the computer 5. For the calculation, various methods for matching figures can be used. As an example, for each optical pattern, a common coordinate axis that passes through the center of gravity and is orthogonal to each other is placed so that the outer circumferences match. What is necessary is just to complement a coordinate value linearly.
[0030]
As shown in FIG. 19, the computer 5 captures an image captured by the projection / imaging device 6 in step S1, as a correction processing function for eliminating distortion (by the calculation means), and from the captured image, using the marker 1 in step S2. While extracting the pattern image, in step S3, a pattern image based on the projection image of the projection / imaging device 6 is extracted, and in steps S4 and S5, geometrical elements such as grids constituting the optical pattern are calculated and held, In step S7, both geometric elements are compared, correction data for matching the optical pattern of the projected image with the optical pattern of the marker 1 is calculated and held, and separately captured from the video image, Or transform the projection image created by CG image generated from 3D space data (S8, S9), and outputs the corrected projection image at step S10.
[0031]
Here, if the screen shape, the screen 3, the projection optical path, and the layout of the projection device 2 do not change, there is no need to process the pattern image by the projection image again to calculate the corresponding geometric element, and the viewpoint position changes. If the geometric element is calculated from the pattern image by the marker 1 in this case, the correction data can be calculated by the combination with the stored geometric element. Therefore, the pattern image is used as a projection image except at the initial setting. The pattern image by the marker 1 is mainly imaged and processed. As a result, the image displayed on the screen 3 when there is no correction shown in FIG. 20A is corrected to an image as shown in FIG.
[0032]
By automatically acquiring data necessary for distortion correction corresponding to the screen system of various shapes such as FIGS. 8 to 10 and the base point position of the user's line of sight, by performing correction using the data, It can express a high level of realism and scale that are close to the real world, and can correct distortions that occur in images on screens of various shapes with simple operations.
[0033]
(Second Embodiment)
FIG. 21 is a block diagram of the image display system, and FIG. 22 is an explanatory diagram of the display surface deformation unit of FIG.
[0034]
As shown in FIGS. 21 and 22, the image display system of the second embodiment has a plurality of drives for moving each part of the screen 3 (the screen 31 in the example of FIG. 22) to change the uneven shape of the display surface. A display surface deformation unit 8 configured by the unit 81, and corrects the data of the image projected by the projection device 2 so that distortion generated in the image on the screen 3 is reduced, and the screen through the display surface deformation unit 8. 3 is configured in the same manner as the image display system shown in FIG. 1 except that it includes a computer 5a that performs control for correcting distortion generated in the image on the screen 3 by deforming the display surface 3.
[0035]
Even with this configuration, it is possible to correct distortion generated in images on various shapes of screens with a simple operation. In addition to correcting the image to be projected using the calculation result, the correction process for the image is simplified by automatically deforming or moving the screen or changing the setting of the projection device. It is possible to improve the performance, and it is possible to maintain the optimal screen shape for the content to be projected.
[0036]
(Third embodiment)
FIG. 23 is an explanatory diagram of an image correction service for an image display system.
[0037]
This service is provided with a processing function for correcting distortion by the computing means of the computer 5 in the server 9 connected to a network (for example, the Internet) N in the image display system of each of the above embodiments, while the rest is provided in the network. Provided on the client 10 side connected to N, each client 10 creates transmission data by the computer 5b based on the image captured by the projection / imaging device 6 and transmits it to the server 9 via the network N. Is based on the transmission data transmitted from the client 10, data for correcting distortion occurring in the image on the screen 3 (31 a and 31 b in the figure) observed from the base point of the line of sight (corrected image data or Correction data itself) is created, and this data is provided to the client 10 via the network N. Performed by the system to be.
[0038]
According to this service, a variety of installation spaces and screen shapes are used to represent virtual spaces such as virtual design centers and virtual shopping malls in a scale that is close to reality, and designed with high accuracy for various users. It is possible to provide a place for product examination that is close to studying or looking at the actual product.
[0039]
In addition, a marker may display the image of an optical pattern on a screen using invisible light. In this case, accurate correction processing can be performed at any time even while the observer is using it without interfering with the original projected image, and the followability to the observer's viewpoint position movement is enhanced, so that the observer can experience while moving. High sense of realism can be obtained.
[0040]
In addition, if the image of the optical pattern is blinked and displayed on the screen by the marker, the influence of external noise can be easily removed, the stability of the correction process is improved, and the synchronization with the blinking timing is achieved. It is also possible to individually recognize the viewpoint positions of both eyes or multiple observers, and to perform optimum correction processing for each, providing a high sense of realism, and also flashing the image of the projection means to synchronize In the case where a plurality of observers share the system, there is an effect that different experiences can be performed simultaneously.
[0041]
Further, when a plurality of markers are used, an image of an optical pattern that is individually color-coded may be displayed on the screen. In this case, even when patterns corresponding to the viewpoint positions of both eyes or a plurality of observers are displayed at the same time, they can be easily distinguished from each other, and by performing correction processing for each effectively, a sense of reality can be obtained. Enhanced.
[0042]
【The invention's effect】
As is apparent from the above, the image display system according to the first aspect of the present invention is a marker means for displaying an image of an optical pattern disposed near the base point of the line of sight, and a projection means for projecting the image. A screen optically positioned between the base point of the line of sight and the projection unit, and an image displayed by the marker unit and the projection unit, and an optical axis set coaxially with the optical axis of the projection unit. Since it comprises an image pickup means for picking up the image above, and a calculation means for correcting distortion generated in the image on the screen observed from the base point of the line of sight based on the image picked up by the image pickup means. The distortion generated in the image on the screen having various shapes can be corrected by a simple operation using only the marker means. In addition, data necessary for distortion correction can be automatically obtained at any time corresponding to the screen system of various shapes and the reference point of the user's line of sight. Compared to the correction parameters calculated from the design drawings, more accurate correction is possible, so it can express a high level of realism and scale close to the real world, and the viewpoint position caused by the movement of the observer during use Not only can it automatically respond to changes, it can also easily respond to changes in screen shape and layout and size, and correction processing can be performed by using a marker means that generates a pattern near the origin of the line of sight. In addition to being able to simplify, the marker means has a simpler mechanism than the imaging system, so it can be simple, lightweight, and compact, so the imaging system can be placed near the origin of the line of sight. The burden on the observer is lighter compared to the configuration of the projector, and the optical system required for imaging in a form suitable for correction for the projection means can be simplified and the cost can be reduced by sharing the optical path for projection. In terms of correction processing, it is easy to match the marker image with the projected image, and it is easy to improve the distortion correction performance of the entire system including distortion caused by the optical system itself. There is an effect that it is easy to realize a sense of scale.
[0043]
According to a second aspect of the present invention, in the image display system according to the first aspect, the projecting unit projects a live-action video image or an interactive CG image on the screen. Distortion that occurs in an image can be corrected with a simple operation.
[0044]
According to a third aspect of the present invention, in the image display system according to the first or second aspect, the marker means is provided in the vicinity of both eyes of the observer, so that the followability to the movement of the observer's viewpoint position is improved, and When performing stereoscopic viewing with binocular parallax, it is possible to perform accurate correction processing, which increases the immersiveness and presence of the observer and improves the accuracy of evaluation studies in the depth direction.
[0045]
According to a fourth aspect of the present invention, in the image display system according to any one of the first to third aspects, the marker means displays an image of the optical pattern on the screen using invisible light. Without disturbing the projected image of the observer, accurate correction processing can be performed at any time even while the observer is using it. Is effective.
[0046]
According to a fifth aspect of the present invention, in the image display system according to any one of the first to fourth aspects, since the marker means blinks and displays the image of the optical pattern on the screen, noise from the outside is displayed. The stability of the correction process can be improved easily, and the viewpoint position of both eyes or multiple observers can be recognized individually by synchronizing with the blinking timing. It is possible to process and get a high sense of realism, and it is also possible to synchronize by blinking the image of the projection means, and when multiple observers share the system, different experiences can be experienced There is an effect that it can be performed simultaneously.
[0047]
The invention according to claim 6 is the image display system according to any one of claims 1 to 5, wherein the calculation means uses an optical pattern of an image by the marker means imaged by the imaging means, Since the distortion near the observer's viewpoint is corrected more preferentially than the distortion in the surrounding area, there is an effect that the performance of the correction process can be improved and a smooth experience is possible.
[0048]
A seventh aspect of the present invention is the image display system according to any one of the first to sixth aspects, further comprising display surface deformation means for deforming the display surface of the screen, wherein the computing means is on the screen. Said The distortion generated in the image on the screen is corrected by correcting the data of the image projected by the projection unit and deforming the display surface of the screen through the display surface deformation unit so that the distortion generated in the image is reduced. Since the correction is performed, not only the image to be projected is corrected in terms of data using the calculation result, but also the correction processing for the image is performed by automatically deforming or moving the screen or changing the setting of the projection means. It is possible to simplify and improve the performance, and it is possible to maintain an optimal screen shape for the content to be projected.
[0049]
According to an eighth aspect of the present invention, in the image display system according to any one of the first to seventh aspects, a plurality of the projection means are provided, and images projected from the plurality of projection means are combined and projected onto the screen. Therefore, it is possible to experience high-definition content with a wide viewing angle without distortion and to enhance the sense of reality.
[0050]
The invention according to claim 9 is the image display system according to any one of claims 1 to 8, wherein a plurality of the marker means are provided for a plurality of observers. Correction can be performed and the presence of a plurality of observers can be enhanced.
[0051]
According to a tenth aspect of the present invention, in the image display system according to the ninth aspect, the plurality of marker units display images of optical patterns that are individually color-coded on the screen. Even when a pattern corresponding to a person's viewpoint position is displayed at the same time, they can be easily distinguished from each other, and an effect of enhancing the sense of realism can be obtained by effectively performing correction processing on each pattern.
[0053]
Claim 11 According to the present invention, in the image display system according to any one of claims 1 to 10, a processing function for correcting distortion caused by the calculation unit is provided in a server connected to a network, and the remaining part is provided in the network. A correction service method for an image display system that is provided and executed on a connected client side, wherein the client creates transmission data based on an image captured by the imaging unit, and transmits the transmission data to the server. Transmitting via the network, and the server creates data for correcting distortion generated in the image on the screen observed from the origin of the line of sight based on the transmission data transmitted from the client And providing this data to the client via the network. Same effect as described in any one of claims 1 to 10 is obtained. In addition, users can not only be freed from troublesome adjustment work when changing the layout of the display system or changing the shape or size of the screen, but can also respond to dynamic changes in the viewpoint position if necessary. It is possible to easily build a system that can provide an experience that is realistic and close to the real scale, and to select a data correction service that balances correction accuracy and processing speed according to the content to be displayed. In addition, the server performance and the benefits of upgrading the correction processing program can be enjoyed at any time, and there is an effect that a high-quality wide viewing angle image experience can be achieved with good cost performance.
[Brief description of the drawings]
FIG. 1 is a block diagram of an image display system according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a specific example of the installation location of the marker in FIG. 1;
FIG. 3 is a diagram showing a specific example of the installation location of the marker in FIG. 1;
4 is a diagram showing an example of an optical pattern of an image displayed on the screen by the marker of FIG. 1. FIG.
FIG. 5 is a diagram showing an example of an optical pattern of an image displayed on the screen by the marker of FIG. 1;
6 is a diagram showing an example of an optical pattern of an image displayed on the screen by the marker of FIG. 1. FIG.
7 is a diagram showing an example of an optical pattern of an image displayed on the screen by the marker of FIG. 1. FIG.
8 is a diagram showing a specific structure example of the screen of FIG.
9 is a diagram showing a specific structure example of the screen of FIG. 1. FIG.
10 is a diagram showing a specific structure example of the screen of FIG. 1. FIG.
FIG. 11 is a diagram showing an arrangement configuration example of each device suitable for the reflection type when the screen of FIG. 1 is a concave screen;
FIG. 12 is a diagram showing an arrangement configuration example of devices according to the transmission type when the screen of FIG. 1 is a concave screen.
FIG. 13 is a diagram showing an arrangement configuration example of each device suitable for the transmission type when the screen of FIG. 1 is a concave screen.
FIG. 14 is a diagram illustrating an arrangement configuration example of devices according to the transmission type when the screen of FIG. 1 is a concave screen.
FIG. 15 is a diagram illustrating an example when there are a plurality of observers.
16 is a diagram illustrating an example of an optical pattern of an image obtained by imaging by the projection / imaging device when the marker displays the image of FIG. 5 on a screen.
17 shows an example of an optical pattern of an image obtained by imaging by the projection / imaging device when the marker displays the image of FIG. 5 on the screen and the projection / imaging device displays the corresponding image on the screen. FIG.
FIG. 18 is an explanatory diagram of distortion correction.
FIG. 19 is a diagram illustrating an example of a distortion correction processing procedure executed by the computer of FIG. 1;
FIG. 20 is an explanatory diagram of the effect of distortion correction.
FIG. 21 is a block diagram of an image display system according to a second embodiment of the present invention.
22 is an explanatory diagram of a display surface deforming unit in FIG. 21. FIG.
FIG. 23 is an explanatory diagram of an image correction service for an image display system according to the third embodiment of the present invention.
[Explanation of symbols]
1 Marker
2 Projection device
3 screens
4 Imaging device
5 Computer
6 Projection and imaging device
7 Mirror
8 Display surface deformation part
9 server
10 clients

Claims (11)

  Marker means arranged in the vicinity of the base point of the line of sight for displaying an image of an optical pattern, projection means for projecting the image, and the marker optically located between the base point of the line of sight and the projecting means A screen on which an image by the means and the projection means is displayed, an image pickup means for picking up an image on the screen with an optical axis set coaxially with the optical axis of the projection means, and an image picked up by the image pickup means An image display system comprising: an arithmetic means for correcting distortion generated in the image on the screen observed from the base point of the line of sight.   The image display system according to claim 1, wherein the projecting unit projects a live-action video image or an interactive CG image onto the screen.   The image display system according to claim 1, wherein the marker unit is provided in the vicinity of both eyes of an observer.   The image display system according to claim 1, wherein the marker unit displays an image of the optical pattern on the screen using invisible light.   5. The image display system according to claim 1, wherein the marker unit blinks and displays the image of the optical pattern on the screen. 6.   The arithmetic means corrects distortion near the viewpoint of the observer more preferentially than distortion around the observer using an optical pattern of an image of the marker means picked up by the imaging means. An image display system according to any one of claims 1 to 5.   Display surface deformation means for deforming the display surface of the screen is provided, and the calculation means corrects data of an image projected by the projection means so as to reduce distortion generated in the image on the screen. The image display system according to claim 1, wherein distortion generated in the image on the screen is corrected by deforming the display surface of the screen through the display surface deforming unit.   The image display system according to claim 1, wherein a plurality of the projecting units are provided, and images projected from the plurality of projecting units are combined and projected onto the screen.   9. The image display system according to claim 1, wherein a plurality of the marker means are provided for a plurality of observers.   The image display system according to claim 9, wherein the plurality of marker units display images of optical patterns individually color-coded on the screen. The image display system according to any one of claims 1 to 10, wherein a processing function for correcting distortion by the calculation means is provided in a server connected to a network, and the rest is a client side connected to the network. A correction service method for an image display system that is provided and executed,
The client creates transmission data based on an image captured by the imaging means, and transmits the transmission data to the server via the network;
The server creates data for correcting distortion generated in the image on the screen observed from the base point of the line of sight based on the transmission data transmitted from the client, and sends the data to the client in the network And provide steps through
An image correction service method for an image display system, comprising:

Images