WO2011157052A1

WO2011157052A1 - 3d imaging system and method

Info

Publication number: WO2011157052A1
Application number: PCT/CN2011/000902
Authority: WO
Inventors: 陈小军
Original assignee: Chen Xiaojun
Priority date: 2010-06-13
Filing date: 2011-05-27
Publication date: 2011-12-22
Also published as: CN102279467A

Abstract

A 3D imaging system includes a colour display and 3D glasses. The 3D glasses comprise a first eyeglass and a second eyeglass, each of which is provided with an interference filter. The interference filter of the first eyeglass only allows one colour of RGB to pass through, and the interference filter of the second eyeglass only allows the other one or two colours of RGB to pass through. A 3D imaging method is also disclosed. By applying the interference filters to the 3D imaging system, the purity of the colour of the light, which is from the light source and beam splitting system of the colour display, is increased, which is advantageous to loading and separating the left and right image information of the 3D image independently.

Description

3D imaging system and method

[Technical Field]

The invention belongs to the field of 3D imaging, and in particular relates to the application of interference filters in a 3D imaging system.

【Background technique】

The 3D display reconstructs the depth of the sensation using images that are slightly different from what the two eyes see. The 3D image contains two slightly different images (one into the left eye and one into the right eye), the binocular vision channel processes and transmits the visual information obtained by the two eyes, and the two different images are synthesized by the brain into An image with spatial depth and dimension information. It is precisely because of the image fusion function of the brain that we "see" the object in the space.

The existing 3D imaging technologies mainly include the following:

I. Chromatic 3D technology: Also known as color separation stereo imaging technology, it is the earliest 3D display technology. It is also the most basic 3D effect display method from the technical point of view. This 3D display auxiliary device only needs to purchase one. Fu Hongqing (red and light blue) color difference glasses can be. The cost is also the lowest.

The color difference 3D technology uses two different angles of view to print images in the same sub-picture in two different colors. If you look at it with the naked eye, it will show a blurred ghost image. Only through the corresponding stereo glasses such as red and blue can you see the stereo effect, that is, the color is red and blue, and the red image passes the blue lens blue through the blue. The color lens, the different images seen by the two eyes, overlap in the brain to present a 3D stereoscopic effect.

The color difference type 3D technology has low difficulty and low cost, but the 3D glasses use absorption filters, and the color filter is not complete, so there is always a ghost problem; the monochromatic light transmittance of the filter lens is about 10%~30%, watch The brightness is low; the color filter lens is not balanced in the color ratio of each band, which will cause color change.

Second, the shutter type 3D technology: Shutter type 3D technology is mainly to improve the picture by quickly brushing the confirmation The new rate (at least 120Hz) to achieve 3D effect is an active 3D technology. 'When the 3D signal is input to the display device (such as a projector, etc.), the 120Hz image is alternately generated in the frame sequence format, and the frame signals are transmitted through the infrared transmitter, and the received 3D glasses are refreshed. Synchronously realize the left and right eyes to view the corresponding image, and maintain the same number of frames as the 2D video. The two eyes of the viewer see different images that are quickly switched, and a stereoscopic depth is generated in the brain to view the stereoscopic image.

Shutter-type 3D technology has become synonymous with 3D technology in the computer and projector industries. However, the shutter type 3D technology needs a refresh rate of at least 120HZ, and the external signal synchronizing device increases the price of the entire display device, and the technical difficulty is also greatly increased; and the 3D shutter glasses are two liquid crystal panels, which are expensive and difficult for many consumers to accept. .

Third, polarized type: Polarized 3D is also called polarized 3D technology, which belongs to passive 3D technology. The price of glasses is also relatively cheap. At present, most 3D cinemas, 3D, etc. use polarized 3D technology. Like the shutter-type 3D technology, the polarized 3D is also subdivided into many types. For example, the polarized 3D used in the projector industry requires two or more projectors with the same performance parameters to achieve 3D effects, and is applied to the television industry. The polarized 3D technology requires a refresh rate of 240 Hz or more, and there are many differences in the implementation. Polarized glasses are inexpensive, have a good 3D effect, and have a large market share. However, when you watch the left and right swings, there will be a ghost. Installation and debugging are cumbersome, and the investment cost of the theater is large; the application technology in TV is too difficult and costly.

4. Eye-eye type 3D technology: Eye-eye type 3D technology is mostly in the research and development stage, and is mainly used in the industrial and commercial display market, so there is not much contact with mass consumers.

In view of this, it is necessary to provide a new type of 3D imaging system.

[Summary of the Invention]

In view of the deficiencies of the prior art, the technical problem solved by the present invention is to provide a 3D imaging system and a 3D imaging method which are more purely spectroscopic.

In order to solve the above technical problem, the technical solution of the present invention is implemented as follows: A 3D imaging system includes a color display device and 3D glasses, wherein the 3D glasses include a first lens and a second lens, and the first lens and the second lens are each provided with an interference filter, The interference filter on one lens can only pass through one color of RGB, and the interference filter on the second lens can only pass through the remaining one or two colors of RGB.

Further, the interference filter on the first lens allows light of a first wavelength range to pass, and the interference filter on the second lens allows light of a second wavelength range to pass, the first There is no overlap between the wavelength range and the second wavelength range.

Further, the 3D imaging system further includes a stereo camera, and the stereo camera is provided with an interference filter, and the interference filter can separate the RGB three colors into light having no overlap in at least two wavelength ranges.

Further, the 3D imaging system further includes a stereo camera, the stereo camera includes a first image camera and a second image camera, and the first image camera and the second image camera are each provided with an interference filter, The interference filter on the first image camera is only allowed to pass through one color in RGB, and the interference filter on the second image camera is only allowed to pass through one or two colors in the remaining RGB.

Further, the color display device is provided with an interference filter, and the interference filter can separate the RGB three colors into light having no overlapping in at least two wavelength ranges.

Further, the color display device includes a stereo projector, the stereo projector includes a first projector and a second projector, and the first projector and the second projector are each provided with an interference filter, The interference filter on the first projector is only allowed to pass through the RGB1 color, and the interference filter on the second projector is only allowed to pass through the remaining RGB1 or 2 colors.

Further, the color display device includes a stereo projector, and the stereo projector is provided with a rotatable band pass color wheel, and the band pass color wheel is provided with at least two interference filters that allow light of different wavelength ranges to pass through. Light film.

The band-passing color wheel is a six-band color wheel provided with six interference filters, and the six interference filters respectively transmit light having no overlapping wavelength range, including two adjacent and allowed to pass through. Interference filters for red light in different wavelength ranges, 2 adjacent to each other and allowing transmission of green light in different wavelength ranges The interference filter and two adjacent interference filters that allow transmission of blue light of different wavelength ranges. The invention can also be implemented as follows:

A method for synthesizing a color separation 3D image, the steps of which include:

In the first step, the first image camera captures the image at a first angle of view, and the second image camera captures the image at a second angle of view;

In the second step, the image captured by the first image camera is filtered by the interference filter and stored as a left image of RGB1 color, and the image captured by the second image camera is filtered by the interference filter and stored as the remaining RGB1 color or 2 colors. Right image

In the third step, the left image and the right image are superimposed on the 3D image.

The invention can also be implemented as follows:

A method for implementing 3D imaging, the steps of which include:

In the first step, the first projector and the second projector respectively project the 3D image; the second step, the interference filter on the first projector filters the 3D image - and projects the left image of the RGB1 color, the second projection The interference filter on the machine filters the 3D image and projects the remaining RGB 1 color or 2 color right image;

In the third step, the left image and the right image are received by the 3D glasses, wherein the left image band enters the left eye through the first lens of the 3D glasses, and is cut off at the second lens, and the right image band passes through the second lens of the 3D glasses. Enter the right eye and cut off at the first lens.

In the fourth step, the left image and the right image are superimposed and synthesized in the human brain to present a 3D effect.

Compared with the prior art, the beneficial effects of the present invention are: an interference filter is provided in the 3D imaging system, which has high brightness, no ghosting, and low cost.

[Description of the Drawings]

Fig. 1 is a flow chart showing the synthesis of color separation 3D images by the 3D imaging system of the present invention. Fig. 2 is a schematic view showing the projection of a color separation 3D image according to the present invention.

Figure 3 is a flow chart showing the implementation of 3D imaging using the 3D imaging system of the present invention.

Figure 4 is a flow chart showing the implementation of true color 3D imaging using the 3D imaging system of the present invention. Figure 5 is a schematic view of the six-pass color wheel of the present invention.

Fig. 6 is a view showing the color filter curve of the six-pass color wheel of the present invention in the entire visible light region.

FIG. 7 is a schematic view showing the projection of a 3D image by using an LCD liquid crystal projector provided with an interference filter according to the present invention.

【detailed description】

The present invention relates to a 3D imaging system comprising a color display device and 3D glasses. A stereo camera is also required for capturing 3D images. The stereo camera includes two cameras, a first image camera and a second image camera, and a color filter device is disposed on the 3D glasses. The two cameras respectively capture different angles of view when shooting 3D images, wherein the images captured by the first image camera are stored as left images, and the images captured by the second image camera are stored as right images, left images and right The images are superimposed and combined into a 3D image. The 3D image is received by the 3D glasses through the stereo projector projection, and the 3D glasses pass the color filter device to pass the left image through the color filter device disposed in front of the left eye, and the right image passes through the color filter device disposed in the front of the right eye, thereby The left and right eyes of the person are respectively received different left and right images and present a 3D effect in the human brain.

The 3D imaging system of the present invention has at least one color filter device provided with an interference filter in at least one of a stereo camera, a color display device and 3D glasses, the interference filter is more purely separated, and can be controlled by a wavelength cutoff point. It can only pass the color of RGB specific band, and the interference filter is set on the stereo camera. It can choose to transmit light without overlapping in at least two wavelength ranges, making the color separation more independent.

The 3D glasses include a first lens and a second lens, and an interference filter is respectively disposed on the first lens and the second lens, wherein the interference filter on the first lens can transmit 1 color of RGB, and the second lens The interference filter can pass through the remaining 1 or 2 colors of RGB. The interference filter on the first lens may allow light of a first wavelength range to be transmitted, and the interference filter on the second lens may allow light of a second wavelength range to pass through, the first wavelength range and the first wavelength range The two wavelength ranges are independent of each other and do not overlap. In the stereo shooting, two cameras of the first image camera and the second image camera are required, and the interference lenses of the two stereo cameras are provided on the lens, wherein the interference filter on the first image camera is only allowed to pass through the RGB. 1 color, the interference filter on the second image camera is only allowed to pass through the remaining 1 or 2 colors of RGB.

An interference filter is arranged on the display screen of the color display device, and the wavelengths of the three colors of the RGB of the image can be selectively intercepted and transmitted, and the transmitted light is at least two non-overlapping wavelength ranges, which can make the transmission transparent. The light passing through is three colors of R, G, and B without overlap in the three wavelength ranges; the transmitted light can be divided into two bands with no overlapping wavelengths, one of which intercepts RGB1 color, and the other band intercepts the remaining RGB1. Color or 2 colors.

The color display device further includes a stereo projector, and an interference filter of only one or two colors of RGB can be disposed in front of the light source of the projector, and the 3D image can be filtered through the interference filter to project a 2D image.

The filter device in the 3D imaging system uses the interference filter to adjust the light source and the spectroscopic system of the display system to be purer and more independent, so as to facilitate independent loading of the left and right image information of the color separation 3D image, and can be performed at any wavelength. As of/off, the independent color on/off of the left and right image of the color separation 3D image not only reduces/eliminates the ghost phenomenon but also increases the brightness.

FIG. 1 is a flowchart of a method for synthesizing a color separation 3D image by using a stereo camera, which includes two cameras, a first image camera and a second image camera, which are captured by different angles of view. In the present invention, two stereo cameras are used. Each of the lenses is provided with an interference filter, wherein the interference filter on the first image camera is only allowed to pass through one color in RGB, and the interference filter on the second image camera is only allowed to pass through the remaining one of the RGB. Color or 2 colors (Also, the interference filter on the image camera is only allowed to pass through 1 color in RGB, and the interference filter on the first image camera is only allowed to pass through the remaining 1 or 2 colors of RGB).

The method of synthesizing 3D images using the first image camera and the second image camera provided with the interference filter is as follows:

In the first step, the first image camera captures the image from the first angle of view, and the second image camera Taking a second angle of view;

In the second step, the image captured by the first image camera is filtered by the interference filter and stored as

The left image of RGB1 color, the image captured by the second image camera is filtered by the interference filter and stored as the remaining right image of RGB1 color or 2 colors;

The color filter of the stereo camera is an interference filter-light film, which can make the transmitted color brightness better and the color more pure.

FIG. 2 is a schematic diagram of projecting the color separation 3D image, including a high-speed rotating RGB tri-color wheel, and the high-speed rotating RGB tri-color wheel can completely separate the RGB three colors independently, and can pass through 3 There is no overlapping light in the wavelength range.

The method of projecting the color separation 3D image is as follows:

In the first step, the color separation 3D image is projected by the light source to the high-speed rotating RGB tri-color wheel; in the second step, the high-speed rotating RGB tri-color wheel filters the 3D image into a left and right image with no overlapping wavelengths;

In the third step, the DMD micromirror outputs the left and right images to the lens.

The interference filter in the color display device controls the light output of the RGB3 color to be independent of the wavelength range by selecting the cutoff point, so that the color of the left and right images is not crossed, and ghosting is avoided.

FIG. 3 is a flow chart showing projection of 3D images by the stereo projector. The stereoscopic 3D video projector including a projection of the first projector and the second projector, on the two stereoscopic projectors lens are provided with an interference filter, which filter ⁵ intervention only on a first projector Allowing transmission of 1 color in RGB, the interference filter on the second projector is only allowed to pass through the remaining 1 or 2 colors of RGB (or the interference filter on the second projector is only allowed to pass through 1 color in RGB) The interference filter on the first projector is only allowed to pass through the remaining 1 or 2 colors of RGB). An interference filter on a stereo projector that filters 3D images into 2D left or right images.

The side where the 3D image is projected by the first projector and the second projector provided with the interference filter The law is as follows:

In the first step, the first projector and the second projector respectively project the 3D image, and the 3D image includes a left image of RGB 3 colors and a right image of RGB 3 colors;

In the second step, the interference filter on the first projector filters the 3D image and projects the left image of RGB 1 color, and the interference filter on the second projector filters the 3D image and projects the remaining GB1 or 2 colors. Right image

In the third step, the left image and the right image are received by the 3D glasses, wherein the left image passes through the interference filter of the first lens of the 3D glasses into the left eye, and is cut off by the interference filter on the second lens, the right image band The interference filter passing through the second lens of the 3D glasses enters the right eye and is blocked by the interference filter of the first lens.

FIG. 4 is a flow chart of projecting a true color 3D image by using the stereo projector. The true color 3D image includes a left image of RGB 3 colors and a right image of RGB 3 colors, and the left image of RGB 3 colors includes left red, left blue, and Left green three colors, RGB3 color right image includes right red, right blue and right green. The interference filter in the stereo projector is composed of six interference filters and is disposed on a rotatable six-band color filter, and the six interference filters are respectively transparent in the wavelength range. Light, including two adjacent interference filters that allow red light in different wavelength ranges, two adjacent interference filters that allow transmission of green light in different wavelength ranges, and two adjacent and allow different transmissions Interference filter with blue light in the wavelength range. Figure 5 is a schematic view of the six-pass color wheel of the present invention. The six interference filters are arranged on the six-pass color wheel in a circle, and are only allowed to pass through the left red, the left blue, the left green, and the right respectively. Images of six different bands of red, right blue, and right green. Figure 6 shows the color filter curve of the six-pass color wheel in the entire visible light region. During the rotation, the six-band color wheel can pass through the left red, right red, left blue, right blue, left green and right green. Band color.

The present invention also provides a left and right three-band color separation 3D glasses that cooperate with the six-pass color wheel, including a first lens and a second lens, wherein the first lens is provided only through left red, left blue and left Green interference filter with three different wavelength ranges, the second lens is only through the right red, right blue And the right green three interference filters of different wavelength ranges, that is, the first lens can only pass through the left image, and the second lens can only pass through the right image. The left and right three-band color separation 30 glasses can filter and transmit images of six different wavelength ranges through the six-pass color wheel through the interference filters on the first lens and the second lens, and finally in the brain. Synthesize and present true color 3D effects. The wavelength ranges to which the left red, left blue, left green, right red, right blue, and right green belong do not overlap.

The method of projecting true color 3D images using a stereo projector with a six-band color wheel is as follows: In the first step, the true color 3D image is divided into two groups of bands independent red, green and blue by a six-band color wheel, and one set shows true. The left image of the color 3D image, and the other group displays the right image of the true color 3D image.

The second step is then received by two three-band splitter 3D glasses, and the three-band pass of the first lens allows a set of red, green and blue bands of the left image to pass, and a set of red-recorded blue bands of the right image is cut off;

Similarly, the three-band splitting design of the second lens allows a set of red, green and blue bands to display the right image to pass, and a set of red, green and blue bands of the left image is displayed;

The true color 3D imaging method can also be realized as follows: The light source is a six-color laser light source, and the left image of RGB three colors and the right image of three colors of RGB are directly output to the left and right three-band color separation 3D glasses.

FIG. 7 is a schematic diagram of 3D image projection using an LCD liquid crystal projector provided with an interference filter, the LCD liquid crystal projector including a light source 1, interference filters 3 and 6, mirrors 2, 4, 7 and 8 and the color display device 5, the interference filter can project light in a completely independent band.

The 3D image projection method using the LCD liquid crystal projector provided with the interference filter is as follows: In the first step, the mirror 2 reflects the 3D image projected by the light source 1 to the interference filter 3; the second step, the interference filter 3 One color of RGB is transmitted and reflected by the mirror 4 to the color display device 5, and the remaining two colors of RGB are reflected by the interference filter 3 to the interference filter 6; in the third step, the interference filter 6 will be the remaining RGB One of the two colors is transmitted and transmitted to the color display device 5, and the other color is reflected to the mirror 7 and finally reflected by the mirror 8 to the color Color display device 5.

Further, the present invention can also be arranged in front of the LCD liquid crystal projector light source 1 to provide a six-band color wheel or two three-band color wheel, the two three-band color wheel is composed of two parts, each part is half The circle can pass through the left image with RGB3 color and the right image with RGB3 color. The two three-band color wheel can pass through left red, left blue, left green, right red, right blue and right green.

The interference filter is applied in the 3D device, which can adjust the light source and the spectroscopic system of the display system to be purer and more independent, so as to facilitate the independent loading of the left and right image information of the color separation 3D image; the interference filter can also be at any wavelength. Performing up/conducting, independently controlling the color of the left and right images of the color separation 3D image, not only reducing/eliminating the ghost phenomenon, but also improving the brightness, keeping the true color of the original image unchanged, and applying the interference filter. The 3D device is cheap and does not need to swing left and right when viewing.

The above embodiments are only used to illustrate the technical solutions of the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that the technical solutions of the present invention may be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present invention.

Claims

Rights request

What is claimed is: 1. A 3D imaging system comprising a color display device and 3D glasses, characterized in that: the 3D glasses comprise a first lens and a second lens, and the first lens and the second mirror are each provided with interference filtering The interference filter on the first lens can only pass through 1 color of RGB, and the interference filter on the second lens can only pass through the remaining 1 color or 2 colors of RGB.

2. The 3D imaging system of claim 1 wherein: the interference filter on the first lens allows light in a first wavelength range to be transmitted, and the interference filter on the second lens allows The light of the second wavelength range is transmitted, and the first wavelength range and the second wavelength range do not overlap.

3. The 3D imaging system according to claim 1, wherein: the 3D imaging system further comprises a stereo camera, the stereo camera is provided with an interference filter, and the interference filter can be RGB three colors The color separation is light that does not overlap in at least two wavelength ranges.

4. The 3D imaging system according to claim 1, wherein: the speed 3D imaging system further comprises a stereo camera, the stereo camera comprising a first image camera and a second image camera, the first image camera and the The two image cameras are each provided with an interference filter. The interference filter on the first image camera is only allowed to pass through one color in RGB, and the interference filter on the second image camera is only allowed to pass through the rest. 1 or 2 colors in RGB.

5. The 3D imaging system according to claim 1, wherein: the color display device is provided with an interference filter, and the interference filter can separate RGB three colors into at least two wavelength ranges. Overlapping light. .

6. The 3D imaging system according to claim 1, wherein: said color display device comprises a stereo projector, said stereo projector comprising a first projector and a second projector, said first projector and The second projector is provided with an interference filter, the interference filter on the first projector is only allowed to pass through the RGB1 color, and the interference filter on the second projector is only allowed to pass through the remaining RGB1 color or 2 Color

7. The 3D imaging system according to claim 1, wherein: said color display The display device includes a stereoscopic projector, and the stereoscopic projector is provided with a rotatable bandpass "color wheel, and the bandpass color wheel is provided with at least two interference filters for allowing light of different wavelength ranges to pass through.

8. The 3D imaging system according to claim 7, wherein: the band pass color wheel is a six band pass color wheel provided with six interference filters, and the six interference filters are respectively permeable. Light that does not overlap in the wavelength range, including two adjacent interference filters that allow red light in different wavelength ranges, two adjacent interference filters that allow green light to pass through different wavelength ranges, and two phases An interference filter that is adjacent to and allows blue light to pass through different wavelength ranges.

9. A method of synthesizing a color separation 3D image using the 3D imaging system of claim 4, the steps comprising:

- in the first step, the first image camera captures the image at a first viewing angle, and the second image camera captures the image at a second viewing angle;

In the second step, the image captured by the first image camera is filtered by the interference filter and stored as a left image of RGB1 color, and the image captured by the second image camera is filtered by the interference filter and stored as the remaining RGB1 or 2 colors. Right image

10. A method of implementing 3D imaging using the 3D imaging system of claim 6, the steps comprising:

In the first step, the first projector and the second projector respectively project the 3D image; in the second step, the interference filter on the first projector filters the 3D image and projects the left image of the RGB color, the second projection The interference filter on the machine filters the 3D image and projects the rest

RGB1 color or 2 color right image;

In the third step, the left image and the right image are received by the 3D glasses, wherein the left image band is transmitted through

The first lens of the 3D glasses enters the left eye and is cut off at the second lens.

The second lens of the 3D glasses enters the right eye and is cut off at the first lens. In the fourth step, the left image and the right image are superimposed and synthesized in the human brain to present a 3D effect.