JPH08240789A - Picture display device and image inputting device - Google Patents

Abstract

PURPOSE: To perform improvement in easily-seeing by making the size of a picture presented to the left eye of an observer differ from the size of the picture presented to the right eye of the observer. CONSTITUTION: Images having parallax are respectively inputted to picture display units 1L, and 1R from an image signal generating part 2, the displayed pictures 4L, and 4R displayed by the picture display units 1L, and 1R are presented to the right and left eyes 6L and 6R or the observer as observation pictures 4L', and 4R' by optical systems 30L, and 30R, so that the observer can stereoscopically observe the observation pictures. In the case, the constitutions of the optical systems 30L and 30R are nearly bilateral symmetry; however, the focal distance of the lens 3R' for the right eye can be varied. The focal distance can be varied, so that the size of the observation picture 4R' can be adjusted. A magnification modulator 7 modulates the size of the displayed picture 4 from the part 2 by means of coordinate transformation processing. Evaluation in the easily-seeing for a stereoscopic picture is higher in the case magnification difference of about ±2% exists between the right and left pictures than in the case magnification deviation does not completely exist.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device and an image input device, and when an observer independently presents a left-eye image and a right-eye image having parallax to the left and right eyes of the observer, The size of the image for the left eye and the size of the image for the right eye to be observed are made different from each other, which is suitable for a head-mounted display, a three-dimensional television, and the like in which the visibility is improved.

[0002]

2. Description of the Related Art Conventionally, a plurality of images having parallax (hereinafter also referred to as parallax images) are independently presented to both eyes of an observer,
Many image display devices have been presented that allow an observer to recognize a stereoscopic image. "3D Display" (Chihiro Masuda,
Published by Sangyo Tosho Co., Ltd., the following various types of stereoscopic image display devices are disclosed.

FIG. 34 is an explanatory diagram of an anaglyph type three-dimensional display (a three-dimensional image display device). In this method, the display image for the right eye and the display image for the left eye are superimposed and displayed in two colors, such as red and blue, respectively, and the images for the left and right eyes are separated by a color filter to recognize the stereoscopic image for the observer. I am letting you.

FIG. 35 is an explanatory diagram of a polarizing glasses type three-dimensional display. In this method, an image for the right eye and an image for the left eye are displayed on separate CRTs, respectively, and polarizing filters (polarizing plates) whose vibrating planes (polarizing planes) are orthogonal to each other are arranged in front of the CRT. A half mirror is installed so that the optical path for observing each CRT is common. The polarized glasses are used to separate the observation images for the left and right eyes so that the observer can recognize the stereoscopic image.

FIG. 36 is an illustration of a time-division shutter type three-dimensional display. In this method, the images for the left and right eyes are alternately displayed on the CRT (in time division), and the images for the left and right eyes are separated by using time-division shutter glasses that open and close in time division in synchronization with the images. It recognizes a stereoscopic image.

FIG. 37 is an explanatory diagram of an optical three-dimensional display. In this method, using optical means such as a prism, a mirror, and a lens, the images for the left and right eyes displayed on the display unit are
The stereoscopic image is recognized by presenting it independently to the left and right eyes of the observer so as to be observed as a virtual image in front of the observer.

FIG. 38 is an explanatory diagram of a lenticular type three-dimensional display. In this method, the images for the left and right eyes, which are input as stripe images corresponding to the pitch of the lenticular plate, are separated through the lenticular plate, and the observer recognizes the stereoscopic image.

FIG. 39 shows a large convex lens / large concave mirror type 3
It is explanatory drawing of a three-dimensional display. FIG. 39 (A) shows the principle of the large concave mirror system, and FIG. 39 (B) shows the principle of the large convex lens system.

In this method, a projector is used to form an image for the left and right eyes on a large convex lens or a large concave mirror, and light rays based on the image enter the corresponding eyes, respectively.
The installation position of the projector and the spatial positions of the image for the right eye and the image for the left eye are determined and displayed to allow the observer to recognize the stereoscopic image.

FIG. 40 is an explanatory diagram of a parallax barrier type three-dimensional display. In this method, a slit-shaped barrier (parallax barrier) is arranged in front of the image display means, and the images for the left and right eyes alternately displayed in stripes are displayed due to the difference in the left and right line-of-sight positions when observing through the barrier. It is separated and the observer recognizes the stereoscopic image.

FIG. 41 is an explanatory diagram of an integral type three-dimensional display. In this method, the fly's eye lens (Fig. 4
1 (A)), the parallax image of the subject is received (input) by the image pickup device, recorded, transmitted, and displayed as an image on the display device.

Each parallax image becomes a real image by the fly's eye lens and is imaged in the air at the same position as when the image was picked up. When an observer observes this real image from various directions, a parallax image suitable for each direction can be observed. (FIG. 41 (B),
(C)) On the other hand, as a method of inputting a parallax input image used for the above-described three-dimensional display, a method of capturing an object from a plurality of directions with a plurality of cameras is generally used.

Among these, for the methods such as the anaglyph method, the polarized glasses method, the time division shutter method, the optical method, etc., which require only two input images for the right eye and the left eye with parallax, As shown in FIG. 42, with respect to the object X to be photographed, the image pickup cameras are Y _R and Y _L and the input images X _R and _XL
Is enough.

However, the lenticular system, the large convex lens / large concave mirror system, the parallax barrier system, the integral system and the like require a large number of input images photographed from three or more viewpoints in some cases. Therefore, this system requires a multi-lens camera input means as shown in FIG. (The symbols in the figure will be described in detail later.)
In the integral system, many multi-lens cameras are required in the vertical direction. Instead of this, FIG. 41 shows an example in which an image is taken through a fly's eye lens.

Further, in recent years, the number of cases in which an input image (actually photographed) obtained by the camera as described above is calculated by a computer and image-processed is used as a parallax image for stereoscopic vision. Occasionally, based on several input images, generate an image as if the subject was captured from a completely different direction,
The use in the above-mentioned three-dimensional displays is also increasing.

Furthermore, there is an increasing number of cases where a parallax image called CG (computer graphics) artificially synthesized by a computer is used instead of a parallax image obtained by actual shooting.

In particular, if one of the CGs which accurately grasps the information of the object structure in the three-dimensional space and generates an image is used, a plurality of parallax images can be generated from one piece of three-dimensional information. , Can be easily applied to a three-dimensional display that requires the above-mentioned large number of parallax images.

[0018]

In the above-described stereoscopic image display utilizing binocular parallax, there is no definite agreement so far regarding the mutual display conditions between the left and right eye observation images, and only the left and right eye images are displayed. Is always displayed under the same conditions. Then, in consideration of the effect on the observer, there is no image display device in which the display conditions of the images for the left and right eyes are set.

Also in the image input device for inputting an image to the image display device for displaying a stereoscopic image, the conditions for the image for the right eye and the image for the left eye are set in consideration of the effect on the observer. There was nothing.

However, when the inventor of the present application examined the effect of the difference in the display conditions of the images for the left and right eyes on the observer in the stereoscopic image display using binocular parallax, When the magnification difference between the images is given, the visibility of the stereoscopic image is improved. "

However, the difference in magnification is

[0022]

[Equation 4] Is defined.

FIGS. 43 (A) and 43 (B) are graphs showing the results. The horizontal axis of the graph represents a magnification difference (%), and the vertical axis represents a plurality of subjective evaluation values of "viewability" of a stereoscopic image. It is an evaluation value obtained by performing a distributed process statistically for each person.

FIG. 43A shows the case where the difference in magnification is positive.
(B) shows the case where the magnification difference is negative. In the figure, when there is no magnification deviation between the left and right images (magnification difference = 0%)
Compared with, the evaluation of the "easiness of viewing" of the stereoscopic image is higher when the difference in magnification is about ± 2%, and 0 <|
It is high in the range of magnification difference | <3 (%).

From this, it was found that the stereoscopic image can be easily seen by giving a difference in magnification between the images for the left and right eyes observed by the observer.

An object of the present invention is to provide an image display device and an image input device in which the visibility is improved by making the size of the image presented to the observer's left eye different from the size of the image presented to the right eye. I am trying.

[0027]

The image display device of the present invention includes (1-1) a right-eye image and a left-eye image having parallax, which are displayed on the display section of the image display means. The present invention is characterized in that it has a scaling means for relatively changing the size of the image for the right eye and the size of the image for the left eye observed by the observer at the time of presenting. In particular, the scaling means is characterized by changing the size of the image for the right eye displayed on the display unit or the size of the image for the left eye displayed on the display unit by coordinate conversion processing. (1-2) Presenting the image for the right eye having parallax displayed on the display unit of the image display means to the observer via the optical system for the right eye and the image for the left eye via the optical system for the left eye. At this time, the right-eye optical system and the left-eye optical system are set asymmetrically, and the size of the right-eye image and the size of the left-eye image observed by the observer are relatively different. An image display device characterized by the above. (1-3) The right eye optical system and the left eye optical system are set to different focal lengths. In particular, the focal length of at least one of the right-eye optical system and the left-eye optical system is variable, and the image display device according to claim 3 or 4. (1-4) The right-eye image having parallax displayed on the display unit of the image display means is presented to the observer via the right-eye optical system, and the left-eye image is presented to the observer via the left-eye optical system. At this time, the size of the image for the right eye and the size of the image for the left eye displayed on the display unit are relatively changed, or / and the focus of at least one of the right eye optical system and the left eye optical system. It is characterized in that the size of the image for the right eye and the size of the image for the left eye observed by the observer by changing the distance are made different. (1-5) When observing the right-eye image and the left-eye image having parallax displayed on the display unit of the image display unit, the display unit for displaying the right-eye image and the left-eye image are displayed. It is characterized in that the display pixels to be displayed have different display pixel densities, and the size of the image for the right eye and the size of the image for the left eye observed by the observer are relatively different. . In particular, the sizes of the right-eye image and the left-eye image observed by the observer are Rv and Lv, respectively, and the magnification difference ΔV is

[0028]

(Equation 5) It is characterized by satisfying 0 <| magnification difference ΔV | <3.

The image input device of the present invention is (1-6) an image input device for inputting an image to be presented to the observer's right eye and an image to be presented to the left eye to the image display device. By performing coordinate conversion processing on at least one of the images to be presented to the right eye and the left eye by the coordinate conversion means,
It is characterized in that the sizes of images to be presented to the right eye and the left eye are relatively different.

Particularly, the sizes of the images to be presented to the right eye and the left eye are Ri and Li, respectively, and the magnification difference Δi is

[0031]

(Equation 6) It is characterized by satisfying 0 <| magnification difference Δi | <3.

The photographing apparatus of the present invention comprises (1-7) a right-eye photographing system for photographing an image to be presented to the observer's right eye, and a left eye for photographing an image to be presented to the observer's left eye. Image capturing system, the right-eye optical system and the left-eye optical system are set asymmetrically, and the sizes of images to be presented to the right eye and the left eye are made relatively different. Is characterized by. (1-8) It is characterized in that the right-eye imaging system and the left-eye imaging system are set to different focal lengths. In particular, the focal length of at least one of the right-eye imaging system and the left-eye imaging system is variable. (1-9) Coordinate conversion including a right-eye imaging system that captures an image to be presented to the observer's right eye and a left-eye imaging system that captures an image to be presented to the observer's left eye Coordinate conversion processing by means to displace the relative size of the image to be presented to the right eye and the image to be presented to the left eye, and / or the image capturing system for the right eye and the image capturing system for the left eye. It is characterized in that at least one of the focal lengths is changed to make the sizes of images to be presented to the right eye and the left eye relatively different. (1-10) The sizes of the images to be presented to the right eye and the left eye are Rs and Ls, respectively, and the magnification difference Δs is

[0033]

(Equation 7) It is characterized by satisfying 0 <| magnification difference Δs | <3.

[0034]

Embodiment 1 FIG. 1 is a schematic view of the essential portions of Embodiment 1 of the present invention. The present embodiment is an image display device that presents a plurality of images having parallax independently to both eyes of an observer via an optical system and allows the observer to recognize a stereoscopic image, and is attached to the observer's head. This is a so-called HMD (head mounted display).

In the drawing, 1 _L and 1 _R (subscripts _L and _R are elements for the left eye and elements for the right eye, respectively, and the same applies to the following elements) are image display devices (image display means). In this embodiment, a liquid crystal display device with a backlight (hereinafter referred to as LC
(Abbreviated as D) is used. Other than the above, a CRT, a plasma display or the like may be used as the image display.

An image signal generator 2 generates an image signal of a display image 4 _L to be presented to the observer's left eye and an image signal of a display image 4 _R to be presented to the observer's right eye. The image signal of the display image 4 _L is transmitted to the image display 1 _L , and the image signal of the display image 4 _R is transmitted to the image display 1 _R via the magnification modulator 7.

3 _L and 3 _R ′ are lenses, respectively, and display images 4 _L and 4 displayed on the display section of the image display devices 1 _L and 1 _R.
It plays the role of enlarging _R and forming images in front of the observer as virtual images (observed images) 4 _L 'and 4 _R '.

5 _L and 5 _R are mirrors, and the lens 3
_L, 3 and deflects the optical axis of the _R '. The mirrors 5 _L , 5
_On the optical axis deflected by _R , the eyes 6 _L and 6 _R of the observer wearing this apparatus are located, and the image 4 _L 'enlarged by the observer in the direction of the optical axis (front). , 4 _R 'can be observed.

In this embodiment, by using the mirrors 5 _L and 5 _R , the size of the entire apparatus can be reduced and the apparatus can be easily mounted on the head. If the mirror 5 itself has optical power, further miniaturization and improvement of optical performance can be achieved.

If a semi-transmissive mirror is used as the mirrors 5 _L and 5 _R , the outside scene and the observed images 4 _L 'and 4 _R ' can be superposed.

In these configurations, if images having parallax are input from the image signal generator 2 to the image displays 1 _L and 1 _R , respectively, the display image 4 _L displayed on the image displays 1 _L and 1 _R is displayed. , 4 _R are images observed by the optical systems 30 _L and 30 _R.
Presented as _L ', 4 _R ' to the left and right eyes 6 _L , 6 _R of the observer,
The observer can stereoscopically observe the observation image.

In this embodiment, the optical system 30 _L and the optical system 30 _R are substantially symmetrical with each other, except that the lens 3 _R ′ for the right eye has a variable focal length. By making the focal length variable, the size of the observed image 4 _R 'can be adjusted.

Further, in this embodiment, the magnification modulator 7 performs the coordinate conversion processing to display the image 4 from the image signal generator 2.
Modulating the size of _R.

FIG. 2 is a schematic view of a main part showing a modified example of this embodiment, in which the mirrors 5 _L and 5 _R are omitted as compared with FIG.

In this modification, the optical systems 23 _L and 23 _{R are}
Eye 6 _L of the observer on the optical axis, and 6 _R is located, observer observation image is enlarged in the direction of the optical axis 4 _L ', 4 _R' can be observed.

As described above, the optical system 23_L , 23_R And observation
Person's eyes 6_L , 6_R The positions of are set symmetrically.
The left and right optical systems 23_L , 23_R Each observation by
Image 4 _L', 4_R'Is imaged at approximately the same position in space.

Therefore, if the left-eye image 4L and the right-eye image 4R containing the binocular parallax are displayed on the left and right image displays, respectively, the observer can easily perform stereoscopic observation. .

In this modification, the right optical system 23 _R has a variable focal length and changes the size of the observed image 4 _R ′. Further, the magnification modulator 7 is provided between the image signal generator 2 and the image display 1 _R on the right side, and changes the size of the display image 4 _R by the coordinate conversion process.

In the present embodiment and the modified example, the size of the images for the left and right eyes observed by the observer, that is, the observed images 4 _L 'and 4 _R ' are given an appropriate magnification difference, so that "easiness to see" is obtained. Is improving.

Here, the magnification difference

[0051]

(Equation 8) Is defined.

The methods for giving the difference in magnification are roughly classified into the following two methods.

1) Image Coordinate Conversion Method 2) Asymmetric Optical System Method First, 1) the image coordinate conversion method means that when one set of display images is displayed on the image display device 1, at least one display image Display image for left eye 4 _L after coordinate conversion processing
And a display image 4 _R for the right eye is provided with a magnification difference.

2) The asymmetrical optical system method means that when the stereoscopic image display device has one set of optical systems for forming left and right images respectively at predetermined positions, each optical system is constructed asymmetrically (for example, This is a method in which the magnification of each optical system is different), and a difference in magnification is generated in the finally displayed left and right images.

Each of these will be specifically described in the following examples.

In this embodiment, as described above, the observed image 4 _L ',
"Ease of viewing" is improved by giving a difference in magnification between the 4 _R's .

FIG. 3 is a schematic view of the essential portions of the second embodiment of the present invention, and FIG. 4 shows the configuration of the image signal modulator 7 when the image signal sent from the image signal generator 2 is an analog video signal. FIG. 5 and FIG. 5 are diagrams showing the configuration of the image signal modulator 7 when the image signal sent from the image signal generator 2 is a digital video signal. In FIG.
The same elements as those of 1 are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, the optical system 30 _L for the left eye and the optical system 30 _R ′ for the right eye are symmetrically arranged, and the display images 4 _L , 4 _R on the image displays 1 _L , 1 _R are displayed. Are imaged at the same magnification to form observation images 4 _L 'and 4 _R '.

That is, in the present embodiment, the difference in magnification is obtained by subjecting the image signal from the image signal generator 2 to coordinate conversion processing by the magnification modulator 7 and changing the size of the display image 4 _R displayed on the image display 1 _R. Is caused by.

Next, the image coordinate conversion method in the magnification modulator 7 will be specifically described with reference to FIGS. 4 and 5.

In FIG. 4, the analog image signal generated by the image signal generator 2 is converted into a digital signal by the A / D conversion circuit 31 and then sent to the memory circuit 32. On the memory circuit 32, according to a command signal sent from the control circuit 33, coordinate conversion processing such as interpolation and thinning is performed for each pixel to modulate the size of the image.

The control circuit 33 is provided with a knob 34 for adjusting the degree of magnification modulation, and the user freely adjusts the magnification by using this knob 34. The digital image signal modulated on the memory circuit 32 is converted into an analog image signal again by the D / A conversion circuit 35 and sent to the image display 1. Of course, if the image display 1 is capable of inputting a digital signal, the D / A conversion circuit 35 is not necessary.

When the image signal sent from the image signal generator 2 is a digital signal, the configuration of the image signal modulator 7 is as shown in FIG.

The image signal generated by the image signal generator 2 is sent directly to the memory circuit 32. On the memory circuit 32, in accordance with a command signal sent from the control circuit 33, coordinate conversion processing such as pixel movement, interpolation, and thinning is performed to modulate the size of the image.

The control circuit 33 is provided with a knob 34 for adjusting the degree of magnification modulation, and the user freely adjusts the size of the image by using this knob.

The image display 1 is capable of inputting a digital signal, and the modulated digital image signal is directly transmitted to the image display 1.

As described above, regardless of whether the image signal is analog or digital, the desired magnification is applied to the display images 4 _L and 4 _R displayed on the left and right image display devices 1 _L and 1 _R by the above-described configuration. The difference is given.

In this embodiment, the optical systems 30 _L and 30 _R '
Since the configuration is symmetrical and the imaging magnifications are also equal, the difference in magnification between the display images 4 _L and 4 _{R is} the difference in magnification between the observed images 4 _L ′ and 4 _R ′.

FIGS. 6A and 6B are explanatory views showing the display images 4 _L and 4 _R displayed on the image displays 1 _L and 1 _R when a difference in magnification is applied in this embodiment. is there.

FIG. 6A shows a case where a magnification difference of + 2% is applied between the display images 4 _L and 4 _R.

At this time, the size of the display image 4 _L is set to 100.
Then, the size of the display image 4 _R is set to 102.
If the magnifications of the left and right optical systems 30 _L and 30 _R are both 10 times, the size of the observed image 4 _L '4 _R ' is 1000, the size of the observed image 4 _L 'is 1020, and the difference in magnification is the same as the original one. It is + 2% like the image.

Further, in FIG. 6B, the display images 4 _L , 4
A case where a magnification difference of about −2% is given between _R is shown.
At this time, if the size of the display image 4 _L is 102, the size of the display image 4 _R is 100.

In this embodiment, as described above, the display image 4 _L ,
_4R image processing (image coordinate conversion method) improves the "viewability" of stereoscopic images.

The size of the observed image 4 _L '4 _R ' by the image processing is not limited to the one that uniformly changes the entire screen,
Changing the horizontal or vertical size (Fig. 44)
(A), (B)) or a partially changed one (FIG. 44)
(C) and (D) may be used.

FIG. 7 is a schematic view of the essential portions of Embodiment 3 of the present invention. In this embodiment, the same elements as those in the first embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof is omitted.

In this embodiment, the lens 3 _L for the left eye and the lens 3 _R for the right eye have exactly the same structure, but the optical system 30 _L for the left eye and the optical system 30 _R ′ for the right eye are the same. It is composed of lenses 3 _L and 3 _R , display images 4 _L and 4 _R , and observation image 4
_L ', 4 _R' has become the positional relationship is asymmetrical, thereby viewing the image 4 _L ', 4 _R' has given magnification difference therebetween.

At this time, the positional relationship of each element is determined based on the optical paraxial theory as shown in FIG.

In the figure, H _L and _H'L are lenses 3 _L
, F _L , F ′ _L are the focal points of the lens 3 _L , f _L , f ′
_L is the focal length of the lens 3 _L , and z _L and z ′ _L are the focal points F, respectively.
Distances from _L and _F'L to display images (observed images) _4L and _4L '.

Similarly, H _R and H ′ _R are the principal points of the lens 3 _R , F _R and F ′ _R are the focal points of the lens 3 _R , f _R and f ′ _R are the focal lengths of the lens 3 _R , and z _R and z ′ _R is the focal point F _R ,
The distance from _F'R to the display images (observed images) _4R , _4R '.

From the paraxial imaging formula, the magnifications β _L and β _R of the left and right optical systems are β _L = -f ' _L / z _L = -z' _L / f _L β _R = -f ' _R / z _R = −z ′ _R / f _R ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ (1), and if the displayed images 4 _L and 4 _R are of the same size, the magnification difference Δβ (% ) Is

[0081]

[Figure 9] Therefore, the left and right lenses 3 _L and 3 _R and the display images 4 _L and 4 _R
It is sufficient to set the distance between and to z _L and z _R so as to satisfy the expression (3) within the range of 0 <| Δβ | <3 (%).

When the distance z _L and the distance z _R are made different, the distances z ′ _L and z ′ _R are naturally different, and the positions of the observed images 4 _L ′ and 4 _R ′ are also different.

[0083] At this time, (1) from the distance z amount corresponding observation differences'_'R and the distance _{z' L z 'R -z'} L = f R 2 (1 / z R -1 / z L) Observed images 4 _L ', 4 _R ' by making a difference in the distance from the eyes 6 _L , 6 _{R of the person} to the lenses 3 _L , 3 _R
It is also possible to keep the same image forming positions.

At this time, for example, if a magnification difference of 2% is given between the observed images 4 _L ′ and 4 _R ′, the magnifying power is 10 times, and the magnifying power of the optical system for the right eye is 10.2 times. _L , 4 _R
, The observed image 4 _L 'has a size of 1000, and the observed image 4 _R ' has a size of 1020,
The difference in magnification is + 2%.

[0085] As described above, in this embodiment, optical system 30 _L for image display, 30 devising a structure of _R 'and (with different imaging magnification), thereby improving the "visibility".

The size of the observed image 4 _L '4 _R ' due to the asymmetry of the optical systems 30 _L and 30 _R 'is not limited to the one that uniformly changes the entire screen, but the size in the horizontal or vertical direction. May be changed (for example, a cylindrical lens is used) or partially changed.

FIG. 9 is a schematic view of the essential portions of Embodiment 4 of the present invention. In this embodiment, as compared with the fourth embodiment shown in FIG. 7, a lens 8 for correcting magnification is added to the lens 3 _R for the right eye, and a lens 33
Is different.

In the figure, the lens 33 _R and the mirror 5 _R constitute one element of the optical system 30R ″ for the right eye.

In this embodiment, by adding the lens 8 for magnification correction, the distance from the display image 4 _R to the lens 33 _R is changed, and the image formed by the lens 3 _L and the lens 33 _L are changed.
_A difference in magnification is given to the image formed by _R.

At this time, the positional relationship of each element is determined based on the optical paraxial theory as shown in FIG. However, the lens 3 _R in FIG. 8 is read as the lens 33 _R.

[0091] First, from Newton's formula, is a ^{_{f L 2 = z L · z}} L 'f R 2 = z R · z R' ‥‥‥‥‥ (4), right and left observation images 4 _L ', to 'the formation position of the same (i.e. z' 4 _R to _R = z _'L), the ^{_{f L 2 / z L = f}} R 2 / z R ‥‥‥‥ (5).

On the other hand, the magnifications β _L and β of the lenses 3 _L and 33 _R
R is β _L = −f ′ _L / z _L β _R = −f ′ _R / z _R (6), and assuming that the display images 4 _L and 4 _{R have} the same size as described above. , Magnification difference Δβ (%) is

[0093]

[Equation 10] Becomes Formula (5) and formula (7) are combined and focal length f _R
And solving for the distance Z _R ,

[0094]

[Equation 11] Is guided.

At this time, the optical position is adjusted so that the focal length f _R and the distance z _R of the right-eye lens 33 _R meet the conditions of the expressions (8) and (9).

The focal length of the lens 3 _R is the lens 3 _L
Equal to the focal length f _L of, when f8 the focal length of the magnification correction lens 8, the distance between the principal points of the lens 33 _R was d,
The focal length f _R of the lens 33 _R is

[0097]

(Equation 12) Is guided.

From this, when an attempt is made to obtain a difference in magnification of Δβ, it is sufficient to use a lens 8 for magnification correction that satisfies the condition of expression (10).

In addition, as in the first embodiment of FIG.
_A user may arbitrarily adjust the difference in magnification by using any one of _L and 33 _R as a so-called zoom lens system having a variable focal length.

In particular, the improvement in "visibility" due to the difference in magnification is largely due to the individual difference (personal preference), and the adjustment range is preferably set to about -3% to + 3%.

In this embodiment, the difference in magnification is obtained by the asymmetry of the optical systems 30 _L and 30 _R ″, but as in the embodiment of FIG. 1, the image signal generating means 2 _L and 2 _R and the image display device are displayed. 1 _L ,
A magnification modulator 7 may be provided between 1 _R and 1 _R to obtain a magnification difference between both.

At this time, a control means (not shown) is provided to grasp the difference in magnification between the optical systems 30 _L and 30 _R ′ and the difference in magnification between the magnification modulators 7, and the optical systems 30 _L and 30 _R ′ or / Alternatively, the magnification modulator 7 may be controlled to obtain a desired magnification difference.

For example, the magnification difference of the display image 4 _R with respect to the display image 4 _L generated by the image coordinate conversion method is Δβ1.
(%), The difference in magnification caused by the non-target optical system method is Δβ
2 (%) when that 'observation image 4 _R for' observation image 4 _L
The magnification difference Δ of Δ is Δ = Δβ2 + Δβ1 + (Δβ1 * Δβ2 / 100) (%). Therefore, in this case, Δβ1 and Δβ2 are adjusted so that Δ is in the range of −3 to + 3%.

As a result, the present embodiment can be implemented by combining the image coordinate conversion method and the asymmetric optical system method.

The magnification difference is given in the range of -3 to 3%, but the subjective evaluation of the magnification difference also varies from person to person, and the evaluation of the "viewability" of the observed stereoscopic image does not deteriorate. From the above figures (A) and (B), ± 2
Most preferably, it is around%.

As described above, in the present embodiment, the magnification difference can be adjusted so that the observer can select the magnification difference that is most visible. FIG. 10 is an explanatory diagram of a fifth embodiment of the image pickup apparatus according to the present invention.

The present embodiment is a photographing apparatus for photographing a parallax image with a twin-lens camera, and the photographed parallax image is input to an image display device, an image recording device or the like, and the parallax image displayed on the image display device is displayed. The "readability" of the observer who observes or observes the parallax image when the parallax image is reproduced from the recording medium recorded by the image recording device and displayed on the image display device is improved.

In the figure, X is an object to be photographed, Y _L and Y _R are 2
The left and right cameras that make up the eye camera.

60 _L and 60 _R are the cameras Y _L and Y _R , respectively.
Of the photographing optical system, 63 _L and 63 _R are the photographing optical system 60 _L ,
60 _R is a photographing lens that constitutes one element, and images of the object X (photographed image 6) are formed on the image pickup surfaces of the image pickup means 9 _L and 9 _R , respectively.
4 _L , 64 _R ) are formed. The imaging means 9 _L , 9 _R
Captures the captured images 64 _L and 64 _R formed on the imaging surface to obtain respective image signals.

Reference numeral 68 denotes a lens for magnification correction, which is provided in the optical path of at least one of the left and right photographing optical systems 60 _L and 60 _R (the right photographing optical system 60 _{R in} the figure).

In this embodiment, the focal length of the taking optical system 60 _R (that is, the combined focal length of the magnification correction lens 68 and the right lens system 63 _R ) and the taking optical system 60 _{R are used.}
From the image pickup means 9 _{R to} the image pickup surface of the image pickup means 9 _R , and the size of the photographed image 64 _R obtained on the image pickup surface is changed to give a difference in magnification to the photographed image 64 _L.

Here, the magnification difference is

[0113]

(Equation 13) Is defined.

[0114] In this embodiment, by providing a magnification difference between the captured image 64 _L, 64 _R, the captured image 64 _L, 64
Improves the "readability" when _R is displayed on an image display device.

Particularly in this embodiment, the photographing optical system 60 _L , 6
The "readability" is improved by devising the structure of 0 _R (making the imaging magnification different).

As shown in FIG. 11, one photographing optical system (the photographing optical system 60 _R on the right side in the drawing) is composed of a zoom lens system 68 'having a variable focal length, and the size of the photographed image 64 _R is increased. Is adjustable, and for example, the magnification difference Δi is set to -3 to +
It may be adjustable within the range of 3 (%).

As a result, the effect of improving the "viewability" can be adjusted, and the photographer can select the most desirable magnification difference Δi.

Further, as shown in FIG. 12, the photographing optical system 60
_The focal lengths of both _L ′ and 60 _R ′ may be variable, and the control means 69 may be provided to change the photographing magnification while maintaining a desired magnification difference Δi.

At this time, the control means 69 controls the photographing optical system 6
The focal lengths (zoom positions) of 0 _L ′ and 60 _R ′ are detected, and the magnification difference Δi is set to 0 <| magnification difference Δi | <3, and control is performed to maintain this.

Further, as shown in FIG. 13, the magnification modulator 65
Are provided, and images taken by the cameras Y _L and Y _R 64 _L and 64
_R may be image-processed by an image coordinate conversion method to give a difference in magnification.
It is possible to improve "viewability" when _L and 64 _R are displayed on an image display device or the like.

FIG. 14 is a schematic view of the essential portions of Embodiment 6 of the present invention. The present embodiment is an image capturing apparatus that captures a parallax image with a multi-eye camera, and captures a parallax image such that a magnification difference is provided between a captured image for the right eye and a captured image for the left eye. It is a thing.

In the figure, X is an object, and Ya to Ye are cameras, respectively, and the photographic optical systems 13a to 13e form an image of the object X on the image pickup surfaces of the image pickup means 9a to 9e to obtain a photographed image with parallax. Xa to Xe are photographed.

Of these photographed images Xa to Xe, one photographed image corresponds to the display image observed by the observer with the right eye and one photographed image corresponds to the display image observed with the left eye at the time of observation. is there.

Therefore, by setting the sizes of the photographed images Xa to Xe appropriately and photographing them so that there is a difference in magnification, the "viewability" when the photographed images Xa to Xe are displayed on the image display device. Can be improved.

FIG. 15 is an explanatory diagram for displaying on the basis of the photographed images Xa to Xe in the image display device which performs stereoscopic display using binocular parallax.

In the figure, reference numeral 10 is an image display means capable of independently observing five display images with parallax from the same direction as when photographing, for example, a lenticular system, a large convex lens / a large concave mirror system, a parallax barrier. It is an image display means such as a system. 11a-11e have shown the display image displayed.

The image display means displays the display images 11a to 11e corresponding to the photographed images Xa to Xe so that they can be observed from the axes a to e, respectively.

Then, the observer displays the display images 11a to 11e.
When observing, the positional relationship is set such that when the right eye 6 _R is located on the c-axis, the left eye 6 _L is located on the e-axis. That is, the captured image Xc and the captured image Xe are observed as a stereo pair, and similarly, the captured image Xb and the captured image Xd, and the captured image Xa and the captured image Xc are observed as a stereo pair.

Therefore, in this embodiment, the photographed images Xa to Xe are photographed so as to give a difference in magnification between the stereo pairs.

For example, when the size of the photographed image Xa is 100, the photographed image Xb is 100 and the photographed image Xc is 10.
2. If the captured image Xd is 102 and the captured image Xe is 100, a magnification difference of 2% can be obtained between the stereo pairs.

The specific means for providing the difference in magnification is similar to that in the fifth embodiment shown in FIGS. 10 and 11, and for example, as shown in FIG. 16, at least one of the photographing optical systems 13a to 13e (see FIG. Among them, the magnification correction lens 8 is inserted in the optical path of the photographing optical system 13c), and the combined focal length of the photographing optical system (13c) and the magnification correction lens 8 and the photographing optical system (13c) and the magnification The correction lens 8 and the image pickup means (9
The distance to the imaging surface in c) is adjusted appropriately.

Further, as shown in FIG. 17, the photographing optical system 13
At least one of the a to 13e (the photographing optical system 13c in the figure) is a zoom optical system 88,
The focal length of No. 8 and the distance from the zoom optical system 88 to the image pickup surface of the image pickup means (9c) are appropriately adjusted, and the magnification difference is adjusted within the range of -3 to +3 (%).

With these configurations, it is devised so that a desired magnification difference can be obtained for any stereo pair of photographed images.

FIG. 18 is a schematic view of the essential portions of Embodiment 7 of the present invention. The present embodiment is an image capturing apparatus that captures a parallax image with a multi-eye camera, and captures a parallax image such that a magnification difference is provided between a captured image for the right eye and a captured image for the left eye. It is a thing.

In the figure, X is an object, and Ya to Ye are cameras, respectively, and the photographic optical systems 13a to 13e form images of the object X on the image pickup surfaces of the image pickup means 9a to 9e, and there are parallax photographed images. Xa to Xe are photographed.

Reference numeral 17 denotes a magnification modulator, which changes the size of the photographed images Xa to Xe by the coordinate conversion process to generate a magnification difference.

In the coordinate conversion processing by the magnification modulator 17, for example, when the size of the photographed image Xa is 100,
By appropriately differentiating the sizes of the photographed images Xa to Xe such that the photographed image Xb is 101, the photographed image Xc is 102, the photographed image Xd is 103, and the photographed image Xe is 104.
A magnification difference is given between the captured images Xa to Xe.

As in the sixth embodiment shown in FIGS. 14 and 15, if the display position of the image display device and the observation position of the observer are clear, a magnification difference is given in advance between the corresponding photographed images Xa to Xe. You can do it.

Further, as shown in FIG. 19, when the image display means 10 and the position detecting means 69 are provided, the positions of the eyes 6 _L and 6 _R of the observer are detected in real time, and the eyes 6 _L and 6 _R are detected.
_The captured images Xa to Xe corresponding to the display images to be observed are obtained from the positions of _L and 6 _R (the captured images Xe and Xc in the figure),
The magnification modulator 77 may give a difference in magnification between the photographed images (Xe, Xc).

The coordinate conversion processing may be the same signal processing as the magnification modulator 7 of the second embodiment.

FIG. 20 is a schematic view of the essential portions of Embodiment 8 of the present invention. In this embodiment, an input image having parallax is generated by combining and processing images, and it is possible to generate input images from many virtual viewpoints with a small number of cameras.

This embodiment generates a large number of input images having a parallax, similarly to the case where a large number of captured images having a parallax are obtained by the photographing apparatus using the multi-lens camera of the sixth embodiment shown in FIG. The input image is input to an image display device, an image recording device, or the like.

However, in this embodiment, since all the image information is converted into signals and the images are combined / processed from the virtual viewpoint by calculation on the computer, when a magnification difference is given to the left and right input images. Is mainly performed by coordinate conversion processing.

In the figure, X is an object, and Ya and Yb are cameras, respectively, and images of the object X are formed on the image pickup surfaces of the image pickup means 9a and 9b by the image pickup optical systems 13a and 13b. Xa and Xb are being photographed.

Reference numeral 70 denotes a calculation means, which is used by each of the cameras Ya and Y.
The photographed images Xa and Xb from b are subjected to coordinate conversion processing as necessary to obtain input images Xa ′ and Xb ′, and at the same time, an input image Xc ′ is generated.

The calculating means 70 calculates the direction of the viewpoint c based on the image Xa of the object X taken by the camera Ya from the direction of the viewpoint a and the image Xb of the object X taken by the camera Yb from the direction of the viewpoint b. To generate a captured image Xc that is captured by the virtual camera Yc.

The thus obtained three input images Xa'.about.
Xc 'is input to the image display device to display the display images 20a-20
when displaying a c, the observer observes at a time in the right eye 6 _R and the left eye 6 _L of the display image 20 a to 20 c 1
One by one. Display images 20a-2 observed at this time
0c will be described with reference to FIG.

FIG. 21 shows the input image X obtained by this embodiment.
It is explanatory drawing at the time of inputting and displaying a'-Xc 'into an image display apparatus.

In the figure, reference numeral 20 denotes an image display means capable of independently observing display images having three parallaxes from the same direction as at the time of photographing, for example, a lenticular system, a large convex lens / a large concave mirror system, a parallax barrier. It depends on the method etc.

The image display means 20 displays the input images Xa 'to Xa.
Display images 20a to 20c corresponding to c'are displayed so that they can be observed on axes a to c, respectively, and the right eye 6 of the observer is displayed.
_{When R} is located on the a-axis, the left eye 6 _L is set to be located on the c-axis.

That is, the observer displays the display image Xa and the display image X
c, and the display image Xc and the display image Xb are observed as a stereo pair.

Therefore, when such an image display device is used, a magnification difference may be given between the stereo pairs 20a and 20c and between the stereo pairs 20c and 20b.

If the positional relationship between the observer's eyes 6 _R and 6 _L and the image display device is not known in advance, the observer's binocular position is detected in real time and the relative position with the image display device is detected. A computer (calculating means 7 is provided between the two input images corresponding to both eyes of the observer at any time according to the physical positional relationship.
0) The present invention can be implemented by giving a difference in magnification in the image coordinate conversion processing above.

FIG. 22 is a schematic view of the essential portions of Embodiment 9 of the present invention. This embodiment is CG (computer graphics)
Is used to generate an input image having a parallax from an arbitrary viewpoint from one piece of three-dimensional information and input the image to the image display device. The input image having the parallax is presented to the left eye of the observer. A difference in magnification is given between the power input image and the input image to be presented to the right eye.

In the figure, 80 is an image memory, which stores three-dimensional information. Reference numeral 81 denotes a calculation means, which obtains a plurality of input images having parallax from the three-dimensional information of the image memory 80.

Reference numeral 82 denotes a magnification modulator, which performs coordinate conversion processing on the input image from the arithmetic means 81 to give a magnification difference.

In FIG. 22A, the computing means 81 uses a multi-lens camera as shown in FIG.
Input images Xa ″ to Xe ″ corresponding to captured images Xa to Xe having parallaxes taken from the five directions of −e are obtained.

If the positional relationship between the left and right eyes 6 _L , 6 _R of the observer and the image display means is clear, then the input image X
At least one of the two input images corresponding to the left and right eyes of the observer out of a ″ to Xe ″ is subjected to coordinate conversion processing to give a difference in magnification.

Further, when the positional relationship between the observer's eyes and the image display means is not known in advance, the detector 84 is provided as shown in FIG. 22B to observe the image display means 83. The positions of the left and right eyes 6 _L , 6 _R of the observer are detected in real time, and the present invention can be implemented even if a magnification difference is given between two input images corresponding to the left and right eyes 6 _L , 6 _R of the observer at any time. You can

In this embodiment, as described above, the magnification between the image to be presented to the observer's right eye and the image to be presented to the observer's left eye among the plurality of input images having parallax. By providing the difference, the "viewability" when displayed on an image display device or the like is improved.

The difference in magnification is as shown in FIGS. 43 (A) and 43 (B).
It is preferable to set in the range of 0 <| magnification difference | <3.

Further, from the figure, if the magnification difference is set to an effective value for more people, it is desirable to set it to about 2%.

FIG. 23 is an explanatory view of the tenth embodiment of the present invention, and FIG. 24 is a schematic view of the essential portions of this embodiment.

In the figure, X is an object, 181 _L and 181 _R are color filters for the left and right eyes, and 6 _L and 6 _R are the eyes of the observer. Explaining each procedure (20-a) to (20-d), (20-
a) Obtain two input images with parallax by a twin-lens camera method, an image combining / processing method, a CG method, or the like.

(20-b) Two input images are combined into one (display image).

(20-c) The display image is displayed in two colors.

(20-d) The display image is observed through the left-eye color filter 181 _L and the right-eye color filter 181 _R. Becomes

To give a difference in magnification to the display image for the left eye or the display image for the right eye, (1) a method using an asymmetric optical system in the procedure of (20-a) or electronically converting the coordinates of the image. Perform processing.

(2) Image coordinate conversion processing is performed in the procedure of (20-b).

(3) Color filter 181 in the procedure of (20-d)
_{The L} and the color filter 181 _R are configured asymmetrically.

Further, as shown in FIG. 24, two projectors 19 provided with color filters for input images having two parallaxes.
In the case of projecting on 1 screen 192 with 1 _L and 191 _R , it is not necessary to combine the input images into one in advance, and therefore the procedure of FIG. 25 can be performed. This procedure is explained as follows: (22-a) Twin-lens camera system, image composition / processing system, CG
Two input images with parallax are obtained according to the method.

(22-b) Based on the two input images, the two projectors 191 _L and 191 _R respectively project the two images through the color filters and superimpose the images on the screen 192 as display images.

(22-c) The display image is observed through the left-eye color filter 181 _L and the right-eye color filter 181 _R.

In this case, in addition to the method described above,
The projection optical systems of the two projectors that project the display image may be set asymmetrically to give a difference in magnification.

FIG. 26 is a schematic view of the essential portions of Embodiment 11 of the present invention. The present embodiment is based on the polarization glasses method in which the display image for the left eye and the display image for the right eye are displayed in different polarization states and are observed through the polarization glasses.

In the figure, reference numeral 211 denotes polarizing glasses, which have a right-eye lens 211 _R and a left-eye lens 211 _L having polarization filters with different polarization directions from each other.

First, a general procedure for displaying a stereoscopic image by the polarized glasses method will be described. (23-a) Twin-lens camera method, image combining / processing method, CG
Two input images with parallax are obtained by a method or the like.

(23-b) The two input images are displayed as display images on the two image display means.

(23-c) A polarizing plate is installed on each image display means, and two display images are superimposed and displayed by a half mirror.

(23-d) The display image is observed through polarizing glasses. Becomes

In this embodiment, in order to give a difference in magnification between the display image for the left eye and the display image for the right eye, (1) In the procedure of (23-a), the asymmetric optical system method or the image coordinate conversion is performed. Use the method.

(2) The image coordinate conversion method of the image is electronically used in the procedure of (23-b).

(3) In the procedure of (23-c), the optical system for projecting the display images for the left and right eyes is set asymmetrically.

(4) In the procedure of (23-d), the right eye lens 211 _R and the left eye lens 211 _L of the polarizing glasses 211 are set asymmetrically. At least one of these methods is used.

FIG. 27 is an explanatory diagram of Embodiment 12 of the present invention. The present embodiment is based on a time-division shutter system in which a display image for the left eye and a display image for the right eye are time-divisionally displayed and observed through time-division shutter glasses.

In the figure, reference numeral 221 denotes time-division shutter glasses, which are a lens 221 _R for the right eye and a lens 221 _L for the left eye.
And are synchronized with the display of the time-divided display image.

First, the general procedure for displaying a stereoscopic image by the time-division shutter system will be described. (24-a) Twin-lens camera system, image combining / processing system, CG
Two input images with parallax are obtained by a method or the like.

(24-b) Two input images are displayed as display images on the image display means in a time division manner.

(24-c) The display image is observed through the time division shutter glasses.

It becomes:

In this embodiment, in order to give a difference in magnification between the display image for the left eye and the display image for the left eye, (1) in the procedure of (24-a), the asymmetric optical system method or the electronic method is used. The image coordinate conversion method is used for the image.

(2) In the procedure of (24-b), the method of electronically converting the coordinates of the image is used.

(3) In the procedure of (24-c), the lens 22 for the right eye
1 _R and the lens 221 _L for the left eye are set asymmetrically.
At least one of these methods is used.

FIG. 28 is an explanatory diagram of Embodiment 13 of the present invention. The present embodiment is a large-convex lens / large-concave mirror type image display device.

First, the general procedure of the large-convex lens / large-concave mirror system will be explained. (25-a) Multi-lens camera system, image composition / processing system, CG
Input n input images with parallax by a method or the like.

(25-b) The n input images are simultaneously projected as display images in the vicinity of the large convex lens / large concave mirror by n projectors.

(25-c) Two of the plurality of display images projected in the vicinity of the large convex lens / large concave mirror are observed as a stereo pair. Becomes (However, n is a natural number.) In this embodiment, from where the observer observes the large convex lens / large concave mirror (hereinafter simply referred to as an observation position), the observation is performed from the observation position. Magnification difference is given between stereo pairs.

Further, the size of each display image may be set appropriately as in Example 8 of FIG. 18, assuming an observation position that the observer can actually take without specifying the observation position.

Further, as shown in FIG. 19 of the embodiment, the detecting means 69 is provided to detect the positions of the left and right eyes 6 _R and 6 _L of the observer, and the stereo pair to be observed is obtained based on this. Alternatively, a magnification difference may be given.

In this embodiment, in order to give a difference in magnification to the stereo pair, (1) the asymmetric optical system method or the image coordinate conversion method is used in the procedure of (25-a).

(2) The asymmetric optical system method or the image coordinate conversion method is used in the procedure of (25-b). Of these, at least one method is used.

FIG. 29 is an explanatory diagram of Embodiment 14 of the present invention. The present embodiment is a lenticular type image display device.

First, the general procedure of the lenticular system will be described.

In the figure, 241 is a lenticular lens. A display element 242 is a liquid crystal panel or a CRT.

First, description will be given according to the procedure of the lenticular system. (26-a) Multi-lens camera system, image composition / processing system, CG
Input n input images with parallax by a method or the like.

(26-b) Each input image is compressed to a width of 1 / n, divided horizontally into n, and the divided pixels are taken out from the n input images one by one and arranged (composite). ),
It is assumed that there are n display images in a combined state.

(26-c) The n display images are displayed on the display surface of the display element 242.

(26-d) Two display images of the n display images are observed as a stereo pair through the lenticular lens 241. Becomes (However, n is a natural number.) In this embodiment, in order to give a difference in magnification between the stereo pairs, the asymmetric optical system method or the image coordinate conversion method is used in the procedure of (1) (26-a).

(2) The image coordinate conversion method is used in the procedure of (26-b). One of the methods is used.

The image display device shown in FIG. 30 projects n display images on the transmissive double lenticular screen 252 by the n projectors 251 so that the observer can observe through the double lenticular screen 252. I have to.

FIG. 31 shows the procedure in this case. The procedure is as follows: (28-a) Multi-lens camera system, image composition / processing system, CG
Input n input images with parallax by a method or the like.

(28-b) n input images are displayed on the dual lenticular screen 252 by n projectors.
The images are superimposed and projected as one display image.

(28-c) Double Lenticular Screen 25
Two of the n display images are observed through 2 as a stereo pair. Becomes (However, n is a natural number.) Therefore, in this case, in order to give a difference in magnification between the stereo pairs, the asymmetric optical system method or the image coordinate conversion method is used in the procedure of (1) (28-a).

(2) The asymmetrical optical system method or the image coordinate conversion method is used in the procedure of (28-b). At least one of these methods is used.

FIG. 32 is an explanatory diagram of Embodiment 15 of the present invention. The present embodiment is an image display device of the parallax barrier system. In the figure, 271 is a parallax barrier.

First, the general procedure of the parallax barrier system will be described.

(29-a) n input images with parallax are input by the multi-lens camera method, image composition / processing method, CG method, or the like.

(29-b) Each input image is compressed to a width of 1 / n, divided horizontally into n, and the divided pixels are taken out from the n input images one by one and arranged (composite). ),
Let n display images in a combined state.

(29-c) The n display images are displayed on the display surface of the display element.

(29-d) The n is passed through the parallax barrier.
Two of the displayed images are stereo paired and observed. Becomes (However, n is a natural number.) In this embodiment, in order to give a magnification difference between the stereo pairs, the asymmetric optical system method or the image coordinate conversion method is used in the procedure of (1) (29-a).

(2) The image coordinate conversion method is used in the procedure of (29-b). One of the methods is used.

FIG. 33 is an explanatory diagram of Embodiment 16 of the present invention. The present embodiment is an integral type image display device.

First, a general procedure of the integral system will be described.

In the figure, 261 is a fly's eye lens. 26
A display element 2 is a liquid crystal panel or a CRT.

First, description will be made according to the procedure of the integral system. (30-a) n parallax images are input through n fly-eye lenses 261.

(30-b) Display the captured image on the display surface of the display element 262 as n parallax images.

(26-c) The displayed n parallax images are imaged in the air through the fly-eye lens 261 and output.
Becomes (However, n is a natural number) In the present embodiment, in order to give a magnification difference between the display image for the right eye and the display image for the left eye, in the procedure of (1) (26-a) An asymmetric optical system method or an image coordinate conversion method is used.

(2) The image coordinate conversion method is used in the procedure of (26-b).

(3) In the procedure of (26-c), the asymmetrical optical system method is used for each optical system (individual lens in the fly's eye lens 261). At least one of these methods is used.

[0230]

According to the present invention, the size of the image presented to the left eye of the observer and the size of the image presented to the right eye of the observer are made different from each other, so that the image display device and the image input for improving the visibility are provided. A device can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a first embodiment of the present invention.

FIG. 2 is a schematic view of a main part of a modified example of FIG.

FIG. 3 is a schematic view of the essential portions of Embodiment 2 of the present invention.

FIG. 4 is an explanatory diagram of an image signal modulator when the image signal is an analog signal.

FIG. 5 is an explanatory diagram of an image signal modulator when the image signal is an analog signal.

FIG. 6 is an explanatory diagram of a display image when a difference in magnification is applied.

FIG. 7 is a schematic view of the essential portions of Embodiment 3 of the present invention.

FIG. 8 is an explanatory diagram of a positional relationship of each element in the third embodiment.

FIG. 9 is a schematic view of the essential portions of Embodiment 4 of the present invention.

FIG. 10 is a schematic view of the essential portions of Embodiment 5 of the present invention.

FIG. 11 is a schematic view of the essential portions of Embodiment 5 of the present invention.

FIG. 12 is a schematic view of the essential portions of Embodiment 5 of the present invention.

FIG. 13 is a schematic view of the essential portions of Embodiment 5 of the present invention.

FIG. 14 is a schematic view of the essential portions of Embodiment 6 of the present invention.

FIG. 15 is an explanatory diagram when a captured image obtained in Example 6 is displayed on an image display device.

FIG. 16 is a schematic view of the essential portions of Embodiment 6 of the present invention.

FIG. 17 is a schematic view of the essential portions of Embodiment 6 of the present invention.

FIG. 18 is a schematic view of the essential portions of Embodiment 7 of the present invention.

FIG. 19 is a schematic view of the essential portions of Embodiment 7 of the present invention.

FIG. 20 is a schematic view of the essential portions of Embodiment 8 of the present invention.

FIG. 21 is an explanatory diagram when an input image obtained in Example 8 is displayed on an image display device.

FIG. 22 is a schematic view of the essential portions of Embodiment 9 of the present invention.

FIG. 23 is an explanatory diagram of Example 10 of the present invention.

FIG. 24 is a schematic view of the essential portions of Embodiment 10 of the present invention.

FIG. 25 is an explanatory diagram of Example 10 of the present invention.

FIG. 26 is a schematic view of the essential portions of Embodiment 11 of the present invention.

FIG. 27 is an explanatory diagram of Example 12 of the present invention.

FIG. 28 is an explanatory diagram of Example 13 of the present invention.

FIG. 29 is an explanatory diagram of Example 14 of the present invention.

FIG. 30 is a schematic view of the essential portions of Embodiment 14 of the present invention.

FIG. 31 is an explanatory diagram of Example 14 of the present invention.

FIG. 32 is an explanatory diagram of Example 15 of the present invention.

FIG. 33 is an explanatory diagram of Example 16 of the present invention.

FIG. 34 is an explanatory diagram of an anaglyph-type three-dimensional display.

FIG. 35 is an explanatory diagram of a polarization glasses type three-dimensional display.

FIG. 36 is an explanatory diagram of a time-division shutter type three-dimensional display.

FIG. 37 is an explanatory diagram of an optical type three-dimensional display.

FIG. 38 is an explanatory diagram of a lenticular type three-dimensional display.

FIG. 39 is an explanatory diagram of a three-dimensional display using a large convex lens / large concave mirror method.

FIG. 40 is an explanatory diagram of a parallax type three-dimensional display.

FIG. 41 is an explanatory diagram of an integral type three-dimensional display.

[Fig. 42] Fig. 42 is a shooting arrangement diagram when obtaining two parallax images.

FIG. 43 is a graph showing the relationship between magnification difference and legibility.

FIG. 44 is an explanatory diagram of image size

FIG. 45 is an explanatory diagram of image size

[Explanation of symbols]

1 image display device 2 the image signal generating unit 3 _L, 3 _R lens 4 _L, 4 _R photographed image 4 _L ', 4 _R' observation images (virtual images) 5 _L, 5 _R mirror 6 _L, 6 _R observer's eye 7 Image signal modulator 8 Magnification correction lens 30 _L , 30 Optical system

Claims (15)

[Claims] 1. When presenting a right-eye image and a left-eye image having parallax, which are displayed on the display section of the image display means, to an observer, respectively, the size of the right-eye image observed by the observer and An image display device comprising a scaling means for relatively changing the size of the image for the left eye. 2. The scaling means changes the size of the image for the right eye displayed on the display unit or the size of the image for the left eye displayed on the display unit by coordinate conversion processing. The image display device according to item 1. 3. The right eye image having parallax displayed on the display unit of the image display means is presented to the observer via the right eye optical system and the left eye image is presented to the observer via the left eye optical system. At this time, the right-eye optical system and the left-eye optical system are set asymmetrically, and the size of the right-eye image and the size of the left-eye image observed by the observer are relatively different. An image display device characterized by the above. 4. The image display device according to claim 3, wherein the right-eye optical system and the left-eye optical system are set to different focal lengths. 5. The image display device according to claim 3, wherein at least one of the right-eye optical system and the left-eye optical system has a variable focal length. 6. The right eye image having parallax displayed on the display unit of the image display means is presented to an observer via the right eye optical system and the left eye image is presented to the observer via the left eye optical system. At this time, the size of the image for the right eye and the size of the image for the left eye displayed on the display unit are relatively changed, or / and the focus of at least one of the right eye optical system and the left eye optical system. An image display device characterized in that the size of the image for the right eye and the size of the image for the left eye observed by an observer by changing the distance are made different. 7. When observing a right-eye image and a left-eye image having parallax displayed on the display unit of the image display means, the display unit for displaying the right-eye image and the left-eye image are displayed. It is characterized in that the display pixels to be displayed are set to have different display pixel densities, and the size of the image for the right eye and the size of the image for the left eye observed by the observer are made relatively different. Image display device. 8. The sizes of the right-eye image and the left-eye image observed by the observer are Rv and Lv, respectively, and the magnification difference ΔV is Then, 0 <| magnification difference ΔV | <3 is satisfied.
6 or 7 image display device. 9. An image input device for inputting an image to be presented to the observer's right eye and an image to be presented to the left eye to an image display device, wherein the image to be presented to the observer's right and left eyes is An image input device characterized in that at least one of them is subjected to coordinate conversion processing by a coordinate conversion means so that the sizes of images to be presented to the right eye and the left eye are relatively different. 10. The sizes of the images to be presented to the right eye and the left eye are Ri and Li, respectively, and the magnification difference Δi is The image input device according to claim 9, wherein 0 <| magnification difference Δi | <3 is satisfied. 11. A right-eye photographing system for photographing an image to be presented to the observer's right eye and a left-eye photographing system for photographing an image to be presented to the observer's left eye. An imaging apparatus, wherein the optical system for the eye and the optical system for the left eye are set asymmetrically, and the sizes of the images to be presented to the right eye and the left eye are made relatively different. 12. The photographing apparatus according to claim 11, wherein the right-eye photographing system and the left-eye photographing system are set to different focal lengths. 13. The photographing apparatus according to claim 11, wherein the focal length of at least one of the right-eye photographing system and the left-eye photographing system is variable. 14. A coordinate system including a right-eye image capturing system for capturing an image to be presented to an observer's right eye and a left-eye image capturing system for capturing an image to be presented to an observer's left eye. Coordinate conversion processing by means to displace the relative size of the image to be presented to the right eye and the image to be presented to the left eye, and / or the image capturing system for the right eye and the image capturing system for the left eye. An image pickup apparatus, characterized in that at least one of the focal lengths is changed to make the sizes of images to be presented to the right eye and the left eye relatively different. 15. The sizes of the images to be presented to the right eye and the left eye are Rs and Ls, respectively, and the magnification difference Δs is given by: The image pickup apparatus according to claim 11, 12, 13 or 14, wherein 0 <| magnification difference Δs | <3 is satisfied.