JPH01317091A - Multi-directional stereoscopic video equipment - Google Patents

Abstract

PURPOSE:To observe a multi-directional stereoscopic image without reducing the resolution by controlling a direction image selector and a display position switch in response to the position of eyes detected by an eye position detector. CONSTITUTION:A display position control circuit 3 inputs a position signal detected from the position of an observer, accurately from the measurement of the position of eyes by means of an eye, position detector, from the measurement of the position of the forehead spot by means of a photoelectric sensor or the like or from the measurement of the propagation time of an ultrasonic wave reflected in the head and generates signal to control a direction image selector and a display position switch 8 in a direction position conversion circuit 2. That is, in response to the eye position, a direction selection signal as to which direction image among direction images displayed by the direction selector 7 is selected is outputted and whether or not the position of eyes enters nonobserving area is discriminated by a built-in arithmetic function and a control signal of the display position switch 8 is outputted. Thus, the observation of the stereoscopic image in the multi-direction is attained without reducing the resolution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-directional stereoscopic imaging device, and more particularly to a multidirectional stereoscopic imaging device that does not require glasses and can display stereoscopic images from any observation position.

(Beyond the invention) In this book, Akira uses the principle that by changing the relative IQ position between the lens plate and the image, the non-observation area changes to the observation area. Detect the position of Kyoto's lid, select the direction image according to that position, and move the image display position! By moving the eye, the eye position in front of the observation can be moved freely without reducing the resolution Lα of the 3D image, allowing images in many directions to be observed, and the 3D image in front and behind can be viewed correctly. . Moreover, the color display is a multidirectional stereoscopic image device that is realized by field sequential or line sequential.

(Conventional technology) Three-dimensional images are created by viewing an object from two points arranged in a row on the left and right.
The left and right images of the direction are separated into the left and right eyes (two images are projected, and the three-dimensional image is used to cover the observation. In real space, you can not only view from two points on a skewer, but also by moving your head and eyes. , it is possible to see the side of the object or hidden objects.In order to reproduce 3D images similar to those in real space, a multidirectional 3D image method is required in which images from two or more line-of-sight directions are observed as 3D images. Furthermore, stereoscopic images that do not require QIHtt are possible based on a multidirectional stereoscopic image system.

Furthermore, there is a need for a multi-directional 3D image system that allows observers to view images from any position, rather than positioning their left and right eyes at specific positions to view the 3D translation.

Conventionally, this type of multi-directional stereoscopic projection apparatus has been of the grid burr V type or lenticular plate type, which is a space division method.

In optical systems such as photography, a lenticular plate (cylindrical lens pole) is superimposed on a film for viewing, and in television systems, the target land is divided in each direction, and the directional information is converted into position information. and check the grid (
By using a grid or lenticular board to project an image at a specific position, and placing the observer's eye at that position, one can observe a three-dimensional image. On this occasion,
In the case of television images, as in the case of stereoscopic photography, each directional image was made to correspond to each lens block on the lenticular plate in the order of direction.

(Problem that the optical system aims to solve) However, since the separation of the left and right images in each direction is achieved by a lid barrier or a lenticular plate,
The position of the eye (called the observation area) at which a 3D image is viewed is limited to a specific location. In addition to this multi-directional 3D image, the 3D system uses special glasses to separate left and right images.Although there is no limit to the observation area, the visual viewpoint range (called the viewing area) is always the same. It is an imitation.

In FIG. 2 showing the state of the observation area between the display pixels and each lens base of the lenticular plate in the direction v14 in the conventional method, 4 is the image display, 6
is a temporary wrench, and the four directions @(
Let the pixels of m=4) be i-1, i-2, i-3, and i-4. In addition, the ntt pupil distance is normally 6.5 ctn.
), the practical number is between 1 and 2.
However, the figure shows the case where n=1. Corresponding to the lens base 6Δ, directions P4, P3 . P2. Pixel i- in the order of Pi
4,i-3,! -2,! -1 is displayed, both 11fJ positions P7 and P2) P2, P3, P3 and Pi 3fI! ]
is the observation area, and Pi and Pl are the non-observation area. Furthermore, Fig. 3 shows the case where pixels B2 n = 2 are projected to the interpupillary space a, where the positions of both eyes are Pl and P3, P2 and Pi are observation areas, P3 and Pl, Pi and P2 are non-observation areas. become.

In the case of an image only in the two left and right directions P1 and P2, as shown in FIG. 6, the observation area is repeatedly generated at a predetermined visual distance C' and at each hole interval a in the lateral direction. At this time, the positions P1 and P2 of both eyes are the observation area, and this LQ area P1 and P2
) Between the next observation area P1 and 1]2, there is a non-observation area P2 where the left and right □□□ are reversed and the depth is different.

Generally, if the center of the central observation area is zero and the center positions of the left and right eyes are x, then the range of the following equation (1) becomes the observation area.

(m-b,'n-(m/r)-1)/':'
) ・a<x< (rr+-b /n+ (m/n-
1) /2) ·a... (1) Here, b is the number of repetitions of the observation area and is a natural number from O.

As a result, the node times of the observation area are (rn, /n-1) a,
The unobserved region is always required to be a, so iJ+
! In order to obtain a wider field of view, the number of directions must be increased, and the number of pixels within one cypress tree, which is the unit of image observed between three dimensions, must be increased. However, if the pixel density of the display device is fixed, its resolution will be reduced. Resolution is expressed as display capacity/number of directions, and if the number of directions is reduced to improve resolution, non-NA areas often occur, making observation inconvenient because the eye position cannot be freely selected. However, by restricting the eye to a specific location, the advantage of not needing glasses is lost.

In view of the above-mentioned points, the present invention solves the problems of the prior art (h).
It is possible to observe 3D images in multiple directions without reducing the degree of dissolution, eliminate non-observation areas, and easily change the number of directions according to the observation conditions. The purpose of this invention is to provide a directional stereoscopic imaging device.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides a directional image selector that selects a stereoscopic image directional image signal from multiple directions, and a directional image selector that selects a stereoscopic image directional image signal from multiple directions. a direction and position conversion circuit consisting of a display position switch that adjusts the selected direction to the position of the eye; an image display that displays an output image from this direction and position conversion circuit; an eye position detector that detects the position of the eye viewing the image displayed on the image display, and the direction image selector and the display position switch according to the eye position detected by the eye position detector. and control 1
1-J.

According to another aspect of the present invention, the image display is characterized in that it displays video signals of three primary colors at high speed in field sequential or line sequential manner.

(Function) With such technical means, when the eye position is in the non-observation area, the display conditions change and the observation area changes, so that regardless of the eye position, it is always in the observation area and can be viewed in multiple directions. According to the present invention, it is possible to see the correct front and rear stereoscopic images.
As shown in the figure, pixels in each direction are arranged in each lens tree 6A in order of direction.
In other words, it is not necessary to store the direction images in the order of 1...m in one lens tree 6A, and as long as the order of the pixels in each direction does not change as a whole, The lens element 6A and the pixel are relatively shifted in the abscissa (phase), and the image in the direction P1...pl is the two lens elements 6A.
T,: Straddle, 11 ahead! A C1 stereoscopic image is established only when the area moves. When the eyes are positioned at P4 and Pl in the case of FIG. 2, if the display position of the pixels changes as shown in FIG. 4, a correct stereoscopic image will be observed.

Further, in the case of FIG. 3, the display position of the pixel may be changed as shown in FIG. 5, and in the case of FIG. 6, the pixels i-2 and i-1 may be interchanged.

Therefore, by moving the temporary lenticular position or the image display position, it is possible to make Keisei the observation area. Compared to the temporary lenticular position, it is easier to electronically control the image display position, so when the observer's eyes enter the non-observation area, the display position is commanded to change to the observation area.

(Example) Next, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows an outline of an embodiment of the present invention.

In the figure, the multi-directional stereoscopic projection device 10 mainly includes a large number of television cameras 1-1.1-2.1-3. ...1-k,
Direction and position conversion circuit 2) Consists of a display position control circuit 3, an image display 4, an eye position detector 5, a lenticular temporary 6, and a synchronization circuit 9. Television camera 1-1.1-2.・
. . 1-k in each direction can be displayed on a matrix-type or index-type image display 4 through a direction and position conversion circuit 2.

The direction/position conversion circuit 2 is composed of a direction @ selector 7 and a display position switch 8, and each direction video signal is input in parallel, and the direction selector 7 selects which direction image from 2 (1!) or more. Select it, connect it with the display position switch 8, and output it while switching.
Display on image display iW4.

That is, the horizontal scanning period is sampled according to the number of divisions F of the display screen, and the sample tIJ is further divided in time by the number of directional images m.
The direction image signal is sequentially increased between +71. ...3.2.1゜rn,
...Remove in the order of 3.2.1. At the same time, by delaying the switching phase of the control signal of the display position control circuit 3, the display image is shifted to the right by the amount of pixels of the delayed phase and displayed by vJ1.

The display position control circuit 3 detects the position of the observer, more precisely, the position of the eyes, by using the eye position detector 5, for example, to measure a bright spot on the forehead using a charging sensor, or to measure the propagation time of ultrasonic waves that are directed against the head. A position signal detected by measurement or the like is inputted to generate a signal 4 for controlling the direction @ selector 7 and display position switch 8 in the direction/position conversion circuit 2. That is, according to the position of the eye, the direction selector 7 outputs a direction selection signal to select which direction image to display from among the direction images displayed, and the position of the eye is determined by the built-in arithmetic function. determines whether or not it has entered the non-observation area and controls the display position switch 8.
O(It outputs No. 8.

The image display device 4 displays the converted output signal of the direction and position conversion circuit 2 in i-order order, assuming that there are rxm pixels equal to the horizontal scanning period in the full width of the screen.

The lenticular plate 6 is provided overlapping the image display device 4, and the pitch of each lens tree 6A is approximately m times the pixel pitch of the image display device 4, and the pitch of each lens tree 6A is approximately m times the pixel pitch of the image display device 4. The pixels of the image are displayed.

Next, in FIGS. 2 and 3, the image X of each direction image
i-1, i-2, . . . are displayed in each lens element 6A. For example, in Figure 2, input direction @ number K4,
Selected direction image vll=2. When the number of pixels between the pupils a is n·1, the directions P1 and P2. Images of each pair of P2 and P3 or P3 and P4 are projected onto both eyes. In addition, in the case of n・2 in Fig. 3, the images of Pl and P3 or P2 and 24 are both 11
Project to &'.

In Figure 2, the IQ position of the eye is P4, and in Figure 3, it is P3.
and Pl, the display position changes according to the signal from the display position control circuit 3, as shown in FIGS. 4 and 5, and a correct stereoscopic image is observed.

Furthermore, the directional image is selected according to the position of the eye, and i-1
~If pixels i-4 to i-7 are displayed instead of i-4,
In FIG. 4, images in directions P4 and P5 that match the eye position are projected, and in FIG. 5, images in directions P3 and P5 are projected.

FIG. 7 shows a schematic diagram of another embodiment of the present invention. In this example, in Jj, the number of directions of the elephant displayed on each lens tree OA of the lenticular plate 6 is set to 2, and the two-directional image is displayed on the thin 1 yular plate 6 using two color projection displays "ioA and 10B". After the color projection display 10A, 10B, two polarizing plates 11 whose optical angles of 1q are perpendicular to each other are placed, and in front of the lenticular plate 6, a polarizing plate 11 is placed on each lens element 6A. The polarizing plates 11 and 11 are connected to each other for Ω light.
A screen 12 with a quality light rating T, which has 8 vertical light leakage gratings with two rudder rows σ having intersecting light-intersecting surfaces C1, is arranged.

Direction image of the direction position conversion circuit 2A) Select the direction image S3 or S4 from - with the selector 7A, input the direction image S4 to the color projection display 10A with the display position switch 8A, and display the color projection. Switch so that the direction image 3 is input to the device 10B,
Furthermore, by separating the light using the polarizing plate 11 and the screen 12 with an anchor light grating, directional images S4 and 83 are reflected at the positions P1 and 22 of both eyes, respectively, and a correct stereoscopic image is observed. Next, when the positions of both eyes move to P2- and P3, the direction image S from above is selected using the direction @ selector 7A.
2 and $3), input the direction image S24 to the color projection display 10A using the display position switch 8, and input the direction DS3 to the color projection display 10B, thereby changing the position P2' of both eyes. Directional images S3 and 82 are reflected on and P3, respectively, and ■
The L three-dimensional image is iIl! Kyoto is done. As described above, by changing the predetermined directional image and the display position to υ+at+- every time the eye moves, a stereoscopic image in a direction one center from the eye position is observed.

In addition, in the color display using the 4\image method, the color arrangement in the normal rectangular direction cannot be obtained in Fig. 1, so electroluminescence (
A method of stacking three layers of transmissive light emitting material such as red (R), edge (G), and blue (8) as in electroluminescence (EL), or an image of each of the three primary colors of R, G, and B <No. 2 This is possible by constructing the circuit M4 described above and displaying images of each color in field sequence or line sequence.

The field sequential method of the composer is to change the stereoscopic image of the color image to 4517) a white color by switching quickly and displaying 1 field of the R image, 1 field of the G image, and 1 field of the 8 images. On the lenticular plate of the display, three three-primary color spectroscopic filters are sandwiched between two diaphragm rotary filters (1/2). Control t11' in combination with switching
? By doing this, a color stereoscopic image can be obtained. At this time, high-speed scanning is required, but vertical resolution does not deteriorate due to colorization. Here, the field frequency of each color image of R, G, and B is ideally 3x6011z・
18011z, but it is set to 3x40Hz/120tlz, and when it is a mixed color image, each luminance component is appropriately mixed in the R, G, and B image, and when it is a single color, Iff is low, so
There is little interference from flicker.

The latter line sequential method changes the pixel color arrangement to R, G in the M1 direction.
, B-line sequential array display, each color video signal is sequentially scanned every three horizontal scanning lines and displayed.

In this case, three times as many scan lines and a scan speed are required to maintain standard vertical resolution. If the standard number of scanning lines is used, the vertical resolution will be reduced, but this is not a problem because it is commensurate with the horizontal resolution. In addition, J
Since it is combined with light leakage separation, conventional color projection display is sufficient.

According to another embodiment of the present invention, each direction image is recorded in a digital format in the direction and position conversion circuit 2, and the readout address is set to an address obtained by combining the direction selection signal and the position control signal. By reading out the information, the direction image selector 7 and the display position switch 8 can be integrated to provide the same function.

Furthermore, in the above-mentioned θ1, by using a circuit that combines a variable resistor with an A/D converter or a circuit that combines a rotary encoder and a counter instead of the eye position detector 5, the head position can be adjusted to Cs. By manually operating the above-mentioned circuit without moving the camera, images in each direction can be observed sequentially, just as if the user opened his/her head for the first time, and a stereoscopic image with a strong three-dimensional effect can be observed.

(Effects of the Invention) As explained above, according to the present invention, in order to improve the resolution of conventional stereoscopic images, it is necessary to reduce the number of directions, and to put it simply, the observation area where stereoscopic images can be observed is limited. The problem of the conventional technology, which made it difficult to observe freely, was effectively solved, and Kankyona was able to observe 3D images in multiple directions even if he placed his eyes in any position. The effect of a shade is that three-dimensional images can be observed in many directions without any degradation, non-observable areas are removed, and the number of directions can be easily changed according to observation conditions.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the bulk factor of one embodiment of the conventional method 1 (dj Fig. 3 is a state diagram of the observation area and non-observation area in the case of ↓'171-1, which is projected between the eyes and the pupil. iI+! The state diagram of the observation area J-kein and non-observation area, Fig. 11 is J5 in the embodiment of the present invention, and Fig. 2 shows (pixel position and observation area that are switched according to the movement of the eye position) FIG. 5 is a state diagram of one pixel position and observation area that are switched according to the movement a of the eye position in FIG. 3 in the embodiment of the present invention, and FIG. State diagram of the positions of both prefectures and the observation area when the number of directions m = 2 in J5, Figure 7 (schematic configuration diagram of another embodiment of Mitsuaki Yuki. 2.2A: Direction position conversion circuit, 3 : Display (12 position control circuit, 4: Image display, 5: Eye position detector, 6: Lenticular temporary, 7.7A: Direction image selector, 8:, 8A: Display position switch, 9: Synchronous circuit, 10: Three-dimensional projection device, 10A, 10B: Color projection display, 11: Polarizing film, 12: Partitioned light screen.

Claims (1)

[Claims] 1) A directional image selector that selects directional image signals for stereoscopic video captured from multiple directions, and a display position switch that switches the directional image signals selected by the directional image selector in accordance with the eye position. an image display device that displays an output image from the direction and position conversion circuit; and an eye position detector that detects the position of the eye viewing the image displayed on the image display device. A multidirectional stereoscopic imaging device comprising: controlling the direction image selector and the display position switch according to the position of the eye detected by the eye position detector. 2) In the multidirectional stereoscopic video apparatus according to claim 1, the image display device displays the video signals of three primary colors at high speed in field sequential or line sequential. Device.