JPS61146091A - Stereo camera - Google Patents

Abstract

PURPOSE:To reproduce a picture photographed by a stereo camera on a 2-dimensional display scope, by adjusting the light axis of each optical lens system of two pick-up camera to the shift approximately the same to the interval of right/left eyes of an observer. CONSTITUTION:The picture surface cross points Cl, Cr' of lens light axes Cl, Cr are adjusted so that they do not coincise with image pickup scope centers Ol, Or of each pickup camera 31, 32, but so that they are shifted to the right and left so as to obtain approximately the same interval of the right and left eyes of audience. In such a way, the object 5 to be displayed 2-dimensionally is photographed by the 2 cameras 31, 32, and each image is reproduced on a CRT 2-dimensional display scope 3. Thus, the scope centers Ol, Or of cameras 31, 32 coincide with the scope center of the display scope 3. Consequently producing a perspective and natural stereo picture.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a stereoscopic imaging camera that is commonly used in a stereoscopic information display system using a stereo projection method using a image pickup tube (CRT), and particularly relates to imaging optics using two imaging cameras. This is related to the camera configuration of the system.

In general, in a three-dimensional information display system using a stereo projection method using a display screen consisting of a image pickup tube (CRT), two images 2tt and 2r for the observer's left and right eyes 1g and 1r are displayed in different colors. , polarized light, time difference, etc., and displayed on the CR7 display screen 3, and the images 2ii and 2r are displayed on the CR7 display screen 3 through special glasses 4 such as colored glasses, polarized glasses, or shaker glasses corresponding to the images 2g and 2r, respectively. It is observed as two stereoscopic images 7.

On the other hand, the two images 2g and 2r for the left and right eyes 1a and lr of the observer displayed on the CR7 display screen 3 are, as is clear from FIG. and 6r, each lens system Lg,
Images are captured by making the lens optical axis Cg of Lr and Cr parallel.

At this time, the camera imaging plane intersections Cg', Cr' of the respective lens optical axes Cg, Cr coincide with the centers Og, Or of the camera imaging planes Pg, Pr. Of course, as shown in FIG. 5, the projection points of the respective lens optical axes Cg and Cr also coincide with the center X of the CR7 display screen 3.

Therefore, the basics of this stereo projection display method are:
The stereoscopic image 7 is formed at the intersection of the lines of sight for the left and right images 2g+2r, and a stereoscopic visual sensation can be obtained. Intersection point CB of optical axes Cg and Cr
An image of an infinity point represented by ', Cr' is formed on the display screen 3, and in order for the observer to find an object 5 up to the infinity point within the distance to the display screen 3, a stereoscopic image is formed. 7 had the disadvantage of resulting in a so-called split image compressed in the depth direction.

[Conventional technology]

Therefore, in order to correct the split image as described above, in the past, as shown in Figure 6, the observer's left and right eyes were
When the two images 2g and 2r for +1r are displayed on the CR7 display screen 3 by the two imaging cameras 6g and 6r, the control unit 8 sets the X point on the display screen 3 for the left eye image 1g. Center 01 of the camera imaging plane Pg
! At the same time, for the right eye image 1r, the center Or of the camera imaging plane Pr is shifted to the right Or ' By controlling the delay based on the data signal shifted to a point, each shifted left and right image 2a
A method has been proposed in which the distance between +2r centers matches the distance between the observer's eyes.

[Problem that the invention seeks to solve]

By the way, the stereoscopic viewing position of both the left and right images 2g and 2r formed on the display screen 3 by such a method is not natural in the depth direction because the object at infinity at the time of imaging is formed at infinity on the display. A stereoscopic image 7 is formed.

However, according to this method, in order to delay the imaging data signal, for example, on a 14-inch CRT display screen, approximately % of the entire screen is displayed as an invalid display, as shown by diagonal lines in FIG. There is a drawback that the entire area of the display screen 3 cannot be used effectively, such as the area 21.

[Means for solving problems]

The above problem is that one real image is captured by two imaging cameras.
Photographs are taken with the optical axes of each lens optical system parallel to each other, and each photographed image is reproduced and displayed on one two-dimensional display screen.With respect to point /d in the imaging screen on the imaging surface of both of the imaging cameras mentioned above. , moving and adjusting the intersection points of the optical axes of the respective lens optical systems on the imaging surface, and displaying the interval dimension between two photographed images including the optical axes of the respective lens optical systems reproduced and displayed on the two-dimensional display screen. This problem is solved by the stereoscopic imaging camera according to the present invention, which has a configuration in which the shift is adjusted to be approximately equal to the distance between the left and right eyes of the screen viewer.

[Effect]

That is, the present invention captures one object using two imaging cameras.
The optical axes of the lens optical systems are parallel to each other on the imaging surface of the imaging camera for photographing images with the optical axes of the lens optical systems parallel to each other and reproducing and displaying each photographed image on one CRT two-dimensional display screen. By adjusting the intersection points to the left and right from the center point of the imaging screen so that the distance is approximately the same as the distance between the observer's left and right eyes, the observer can see objects up to infinity. Not only is it corrected that a stereoscopic image found within the distance to the display screen becomes a so-called split image compressed in the depth direction, but also the occurrence of an invalid display area on the two-dimensional display screen is corrected. This eliminates the need to use the entire display screen, making it possible to effectively utilize the entire display screen.

〔Example〕

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

FIG. 1 is a schematic configuration diagram of an imaging lens optical system of a stereoscopic imaging camera according to the present invention.

In the figure, 31 and 32 are two imaging cameras,
In the past, the center O of the imaging surface of each imaging camera and the intersection point C' of the imaging surface of the lens optical axis C coincided, whereas in the present invention, the center of the imaging surface of each imaging camera 31, 32 coincides with the intersection point C' of the imaging surface of the lens optical axis C. For the Oi1+ leaf, the optical axis Cg of each lens and the intersection point Cm '+Cr' of the imaging plane of Cr are not made to match, but the right scale is adjusted so that the distance is approximately the same as the distance between the left and right eyes of the observer. The configuration allows for shift adjustments to be made both to the left and to the left as shown in the figure.

In this way, since the lens optical systems Lr and LIL of each of the imaging cameras 31 and 32 are centrally projected, the distance between the tie plane optical axis intersections Cg' and Cr' can be determined as the distance between the observer's left and right eyes. The object 5 to be displayed three-dimensionally is photographed by two imaging cameras 31 and 32 whose shifts have been adjusted to have approximately the same interval, and each photographed image is displayed on the CRT 2 shown in FIG.
By reproducing and displaying on the dimensional display screen 3, the center Oa + of the imaging plane of each imaging camera 31, 32 is shown in the figure.
The image of Or coincides with the center of each image on the display screen 3.

That is, at this time, the projection point Tt of the lens optical axis Ca of the left imaging camera 31 is shifted to the left side from the center X of the display screen 3, and the projection point Tr of the lens optical axis Cr of the right imaging camera 32 is shifted to the left side from the center X of the display screen 3. It is shifted to the right from the center X of the screen 3.

As a result, the viewer can not only see a natural 3D image even in the depth direction to infinity without having to divide the 3D image into a split image, but also the effective display area of the CRT 2D display screen is narrowed. will also be resolved.

〔Effect of the invention〕

As is clear from the above description, according to the stereoscopic imaging camera according to the present invention, the optical axes of the lens optical systems of the two imaging cameras that photograph the object to be displayed stereoscopically are aligned between the left and right eyes of the observer. Since the camera structure is such that the shift can be adjusted to approximately the same interval as the interval dimension, it is possible to reproduce and display images taken by the three-dimensional imaging camera without creating an invalid display area on the CRT two-dimensional display screen.

In addition, it is an excellent technology that allows the viewer to view natural 3D images even to infinity and in the depth direction without distorting the 3D image by viewing the reproduced and displayed images through special glasses. be effective.

Therefore, it is extremely advantageous to be applicable to the structure of this type of stereoscopic imaging camera applied to a stereoscopic information display system using a stereo projection method using a CRT display device.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of the configuration of an imaging lens optical system of a stereoscopic imaging camera according to the present invention, and FIG. 2 shows optical axes of each lens of the stereoscopic imaging camera according to the present invention and a CRT two-dimensional display screen. 3 is a schematic perspective view illustrating an example of a three-dimensional information display system using a stereo projection method using a CRT display device, and FIG. and Fig. 5 is a diagram for explaining the relationship between the configuration of the imaging lens optical system of a conventional stereoscopic imaging camera and the display screen, and Fig. 6 is a display when the split image of the stereoscopic image is corrected by the delay method. A diagram for explaining the screen is shown. In the figure, 3 is a CRT two-dimensional display screen, 5 is an object, 31, 3
2 is a pair of left and right imaging cameras, Oa and Or are the centers of the left and right imaging screens, Cg+Cr are the optical axes of the left and right lenses, Cg ZC
r' is the intersection of the optical axes of the left and right imaging surfaces, X is the center of the display screen, and T
g, Tr edge aW gfls3ryJ Fig. 4 Fig. 6 Fig. 6

Claims (1)

[Claims] One real image is photographed by two imaging cameras with the optical axes of their respective lens optical systems parallel, and each photographed image is reproduced and displayed on one two-dimensional display screen. moving and adjusting the intersection of the optical axes of the respective lens optical systems on the imaging surface with respect to the center point of the imaging screen;
The distance between two photographed images including the optical axis of each lens optical system reproduced and displayed on the two-dimensional display screen is shifted and adjusted to be approximately equal to the distance between the left and right eyes of the viewer of the display screen. A stereoscopic imaging camera featuring: