CN102427547A - Multi-angle stereo rendering apparatus - Google Patents
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Abstract
The invention provides a multi-angle stereo rendering apparatus. The apparatus comprises: a parallax graph generation module and a plurality of renderers. The parallax graph generation module is used to receive a video image and a depth map corresponding to the video image and convert the depth map according to a predetermined parallax control signal so as to obtain multiple angles of parallax maps. A quantity of the renderers is the same with the quantity of the angles. The each renderer is used to perform image rendering according to the parallax map of the each angle and the video image so as to obtain the image of the each angle respectively. According to the apparatus of the invention, a defect of a limited calculating capability during the software multiangle stereo rendering can be overcome. The multi-angle stereo rendering can be concisely and high-efficiently realized. Parallel processing of the multi-angle rendering can be realized. And a user can flexibly control a parameter and a mode during the rendering process.
Description
Technical field
The present invention relates to computer vision and technical field of video processing, the three-dimensional rendering device of particularly a kind of various visual angles.
Background technology
In the shooting of three-dimensional video-frequency, manufacturing process, depth map has reflected that each pixel and observer's the distance of a sub-picture is far and near.Depth map can obtain through different approach, for example the depth finding appearance, in multi-angle video through in three-dimensional coupling, the single-view videos through the image understanding algorithm etc.Disparity map then reflects for same object or scene, the difference that the observer is embodied when under different visual angles, observing, and human body produces third dimension because of these difference.In general, the disparity map that each visual angle observes all is different, and the disparity map of different visual angles can obtain through depth map is handled through quantification, filtering etc.Therefore, playing up based on the solid of depth map is the crucial step that three-dimensional video-frequency is made, handled.
Prior art generally adopts software to carry out the various visual angles solid and plays up, and the problem that prior art exists is that computing capability is limited, data carousel is wide not enough, particularly under video content resolution height, a fairly large number of situation in visual angle, seems particularly outstanding.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency.
For achieving the above object; The present invention proposes the three-dimensional rendering device of a kind of various visual angles; Comprise: the disparity map generation module; Be used for the corresponding depth map of receiver, video image and said video image, and said depth map changed to obtain the disparity map at a plurality of visual angles according to predetermined parallax control signal; And a plurality of renderers, the quantity of said renderer is identical with the quantity at said visual angle, and each renderer is respectively applied for and carries out image according to the disparity map at each visual angle and said video image and play up to obtain the image at each visual angle.
In one embodiment of the invention; Said renderer further comprises: the disparity map pretreatment unit; Be used for generating first control signal and second control signal according to the parallax value and the said parallax control signal of said disparity map; Wherein, the value of said first control signal and said second control signal is 0 or 1; Pixel is moved the unit, is used for according to said parallax value, first control signal and second control signal current pixel of said video image being moved, and obtains the empty flag bit of the pairing position of said current pixel; And the hole-filling unit, be used for said current pixel being carried out hole-filling and with said empty flag bit zero clearing according to said empty flag bit, and the video image of output after filling up.
In one embodiment of the invention, said disparity map pretreatment unit further comprises: first register is used to store the benchmark numerical value of parallax value; Second register is used to store current parallax value; The state judgment sub-unit is used for exporting said first control signal and said second control signal according to said benchmark numerical value and said current parallax value, if said current parallax value is greater than said benchmark numerical value; Then said first control signal output 1; Said second control signal output 1, if said current parallax value equals said benchmark numerical value, then said first control signal output 0; Said second control signal output 1; If said current parallax value is less than said benchmark numerical value, then said first control signal exports 0, said second control signal output 0.
In one embodiment of the invention, when said first control signal exported 1, after said current pixel moved, the empty flag bit of the pairing position of said current pixel was 0; When said first control signal exported 0, after said current pixel moved, the empty flag bit of the pairing position of said current pixel was 1.
In one embodiment of the invention, when said second control signal exported 1, after said current pixel moved, said current pixel was not covered by other pixels; When said second control signal exported 0, after said current pixel moved, said current pixel was covered by other pixels.
In one embodiment of the invention, said pixel is moved the unit and further comprised: status register is used to store empty flag bit; The annular read-write memory is used to store said current pixel; Pixel FIFO memory, the pixel that is used to store cavity position; The write data controller is used for controlling according to said first control signal and second control signal write operation of said annular read-write memory, status register and pixel FIFO memory, when said first control signal exports 1; Then said current pixel is write said annular read-write memory; And,, then simultaneously said current pixel is write said pixel FIFO memory if said second control signal also exports 1 with said empty mark position 1; If said second control signal output 0; Then do not carry out the write operation of said pixel FIFO memory,, do not carry out any operation when said first control signal output 0.
In one embodiment of the invention, said hole-filling unit further comprises: fetch interface is used for reading from said annular read-write memory successively reading said empty flag bit said current pixel and the said status register; The cavity judgment sub-unit is used to judge said empty flag bit; Fill up subelement, be used for filling up said video image, if said cavity sign place value is 1 according to the judged result of said empty flag bit; Then said pixel of reading is effective; Directly export said pixel, and said cavity sign place value is put 0, if said cavity sign place value is 0; Then said pixel of reading is invalid; The corresponding current location of said pixel is a cavity position, from said pixel FIFO memory, reads a pixel value, and the pixel value that obtains to fill up in the said cavity according to the calculated for pixel values of the said cavity position left and right sides and with its output.
In one embodiment of the invention, confirm said annular read-write memory size, and said annular read-write memory is at least said parallax value maximum magnitude value and adds 2 times after 1 according to said parallax value.
In one embodiment of the invention; The transformational relation of said depth map and said disparity map further comprises; According to the parallax value Disp of said disparity map and the depth value Depth of said depth map, change Disp=f* (Depth-Dz) according to following formula; Wherein Dz is zero viewpoint position, and f is a parallax size adjustment parameter.
In one embodiment of the invention; The disparity map generation module comprises that also the parallax control signal is provided with the unit; Be used for through system's setting or user said parallax control signal being set, said parallax control signal comprises quantization parameter and quantitative formula, the size that the control disparity map generates.
According to the three-dimensional rendering device of the various visual angles of the embodiment of the invention; Limited, the wide not enough defective of data carousel of computing capability when having overcome software and carrying out that various visual angles are three-dimensional to be played up; Can realize that succinctly and efficiently solid is played up from various visual angles through hardware configuration; And realizing the parallel processing of each visual angle render process, computational process need not to be subject to computing capability, and the parameter in the render process, pattern can be controlled by user flexibility.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural representation of the three-dimensional rendering device of various visual angles of the embodiment of the invention;
Fig. 2 is the structural representation of the renderer of the embodiment of the invention;
Fig. 3 is the structural representation of the disparity map pretreatment unit of the embodiment of the invention;
Fig. 4 moves the structural representation of unit for the pixel of the embodiment of the invention; And
Fig. 5 is the structural representation of the hole-filling unit of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Fig. 1 is the structural representation of the three-dimensional rendering device of various visual angles of the embodiment of the invention.As shown in Figure 1, according to the three-dimensional rendering device of the various visual angles of the embodiment of the invention, comprise disparity map generation module 100 and a plurality of renderers 200.Wherein, disparity map generation module 100 is used for receiver, video image and the corresponding depth map of video image, and according to predetermined parallax control signal depth map is changed to obtain the disparity map at a plurality of visual angles.A plurality of renderers 200, the quantity of renderer 200 is identical with the quantity at visual angle, and each renderer 200 is respectively applied for and carries out image according to the disparity map at each visual angle and video image and play up to obtain the image at each visual angle.
Particularly, disparity map generation module 100 carries out the conversion of depth map to disparity map according to the parallax value Disp of disparity map and the depth value Depth of depth map according to following formula; Disp=f* (Depth-Dz); Wherein Dz is zero viewpoint position, and f is a parallax size adjustment parameter, and f can regulate voluntarily.
In one embodiment of the invention; Disparity map generation module 100 can comprise that also the parallax control signal is provided with the unit (not shown); Be used for through system's setting or user the parallax control signal being set, the parallax control signal comprises quantization parameter and quantitative formula, the size that the control disparity map generates.Through the parallax control signal unit is set, the parameter in the three-dimensional video-frequency render process, pattern can be controlled by user flexibility, also can pass through system's setting.
Fig. 2 is the structural representation of the renderer of the embodiment of the invention.As shown in Figure 2, comprise that according to embodiments of the invention renderer 200 disparity map pretreatment unit 210, pixel move unit 220 and hole-filling unit 230.Disparity map pretreatment unit 210 is used for generating first control signal and second control signal according to the parallax value of disparity map and parallax control signal, and wherein, the value of first control signal and second control signal is 0 or 1.Pixel is moved unit 220 and is used for according to parallax value, first control signal and second control signal current pixel of video image being moved, and obtains the empty flag bit of the pairing position of current pixel.Hole-filling unit 230 is used for current pixel being carried out hole-filling and with empty flag bit zero clearing according to empty flag bit, and the video image of output after filling up.。
More specifically, Fig. 3 is the structural representation of the disparity map pretreatment unit of the embodiment of the invention, and is as shown in Figure 3, and disparity map pretreatment unit 210 comprises first register 221, second register 222 and state judgment sub-unit 223.First register 221 is used to store the benchmark numerical value DispHistory of parallax value.Second register 222 is used to store current parallax value CurrentDisp.State judgment sub-unit 223 is used for exporting first control signal and second control signal according to benchmark numerical value DispHistory and current parallax value CurrentDisp; If current parallax value CurrentDisp is greater than benchmark numerical value DispHistory, then the output of first control signal output, 1, the second control signal 1; If current parallax value CurrentDisp equals benchmark numerical value DispHistory; Then the output of first control signal output, 0, the second control signal 1, if current parallax value CurrentDisp is less than benchmark numerical value DispHistory; Then the output of first control signal output, 0, the second control signal 0.
Can adjust the value of benchmark numerical value DispHistory after each new parallax value CurrentDisp input as the case may be; For example if current parallax value CurrentDisp less than benchmark numerical value DispHistory; Then benchmark numerical value DispHistory subtracts one, otherwise current parallax value CurrentDisp is composed to benchmark numerical value DispHistory.Wherein the initial value of benchmark numerical value DispHistory is the parallax value of every capable first pixel of image.
In one embodiment of the invention, when first control signal exported 1, after current pixel moved, the empty flag bit of the pairing position of current pixel was 0.When first control signal exported 0, after current pixel moved, the empty flag bit of the pairing position of current pixel was 1.
In one embodiment of the invention, when second control signal exported 1, after current pixel moved, current pixel was not covered by other pixels.When second control signal exported 0, after current pixel moved, current pixel was covered by other pixels.
Fig. 4 moves the structural representation of unit for the pixel of the embodiment of the invention.As shown in Figure 4, pixel is moved unit 220 and is comprised status register 221, annular read-write memory 222, pixel FIFO memory 223 and write data controller 224.Status register 222 is used to store empty flag bit.Annular read-write memory 222 is used to store current pixel.Pixel FIFO memory 223 is used to store the pixel of cavity position.Write data controller 224 is used for controlling according to first control signal and second control signal write operation of annular read-write memory 222, status register 221 and pixel FIFO memory 223; When first control signal exports 1, then current pixel is write annular read-write memory 222, and with empty mark position 1; If second control signal also exports 1; Then simultaneously current pixel is write pixel FIFO memory 223, if the write operation of pixel FIFO memory is not then carried out in second control signal output 0; When first control signal output 0, do not carry out any operation.
In one embodiment of the invention, the size of annular read-write memory 222 determines by the magnitude range of parallax value, suppose the parallax value scope for-DM～+ DM, the actual size of then annular read-write memory 222 is at least 2* (DM+1).The read data mouth of annular read-write memory 222 and the read/write address of write data mouth are by the basic address decision of a circulation change; The address, basis is BaseAddress, and since 0, each clock cycle increases progressively 1; Arriving makes zero behind annular read-write memory 222 maximum address continues to increase progressively; Move in circles, read/write address all thus BaseAddress obtain, the length of supposing annular read-write memory 222 is L; Then read data port address ReadAddress and write data port address WriteAddress calculate according to following formula
ReadAddress＝BaseAddress，
WriteAddress=ModL (BaseAddress+DM+ parallax value)
Wherein, Mod refers to the data in the bracket are carried out modulo operation, and L is the radix of mould, for example Mod3 (8)=2.
Fig. 5 is the structural representation of the hole-filling unit of the embodiment of the invention.As shown in Figure 5, hole-filling unit 230 comprises fetch interface 231, empty judgment sub-unit 232 and fills up subelement 233.Fetch interface 231 is used for reading current pixel and the status register 221 from annular read-write memory 222 successively reading empty flag bit.Cavity judgment sub-unit 232 is used to judge empty flag bit.Fill up subelement 233, be used for filling up said video image, if cavity sign place value is 1 according to the judged result of empty flag bit; The pixel of then reading is effective, direct output pixel, and the cavity indicated that place value puts 0; If cavity sign place value is 0; The pixel of then reading is invalid, and the corresponding current location of pixel is a cavity position, from pixel FIFO memory 223, reads a pixel value; And the pixel value that obtains to fill up in the cavity according to the pixel value of the cavity position left and right sides and with its output, for example utilize approach based on linear interpolation.
According to the three-dimensional rendering device of the various visual angles of the embodiment of the invention; Limited, the wide not enough defective of data carousel of computing capability when having overcome software and carrying out that various visual angles are three-dimensional to be played up; Can realize that succinctly and efficiently solid is played up from various visual angles through hardware configuration; And realizing the parallel processing of each visual angle render process, computational process need not to be subject to computing capability, and the parameter in the render process, pattern can be controlled by user flexibility.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.
Claims (10)
1. the three-dimensional rendering device of various visual angles is characterized in that, comprising:
The disparity map generation module is used for the corresponding depth map of receiver, video image and said video image, and according to predetermined parallax control signal said depth map is changed to obtain the disparity map at a plurality of visual angles; And
A plurality of renderers, the quantity of said renderer is identical with the quantity at said visual angle, and each renderer is respectively applied for and carries out image according to the disparity map at each visual angle and said video image and play up to obtain the image at each visual angle.
2. the three-dimensional rendering device of various visual angles according to claim 1 is characterized in that said renderer further comprises:
The disparity map pretreatment unit is used for generating first control signal and second control signal according to the parallax value and the said parallax control signal of said disparity map, and wherein, the value of said first control signal and said second control signal is 0 or 1;
Pixel is moved the unit, is used for according to said parallax value, first control signal and second control signal current pixel of said video image being moved, and obtains the empty flag bit of the pairing position of said current pixel; And
The hole-filling unit is used for said current pixel being carried out hole-filling and with said empty flag bit zero clearing according to said empty flag bit, and the video image of output after filling up.
3. the three-dimensional rendering device of various visual angles according to claim 2 is characterized in that said disparity map pretreatment unit further comprises:
First register is used to store the benchmark numerical value of parallax value;
Second register is used to store current parallax value;
The state judgment sub-unit is used for exporting said first control signal and said second control signal according to said benchmark numerical value and said current parallax value, if said current parallax value is greater than said benchmark numerical value; Then said first control signal output 1; Said second control signal output 1, if said current parallax value equals said benchmark numerical value, then said first control signal output 0; Said second control signal output 1; If said current parallax value is less than said benchmark numerical value, then said first control signal exports 0, said second control signal output 0.
4. the three-dimensional rendering device of various visual angles according to claim 3 is characterized in that,
When said first control signal exported 1, after said current pixel moved, the empty flag bit of the pairing position of said current pixel was 0;
When said first control signal exported 0, after said current pixel moved, the empty flag bit of the pairing position of said current pixel was 1.
5. the three-dimensional rendering device of various visual angles according to claim 3 is characterized in that,
When said second control signal exported 1, after said current pixel moved, said current pixel was not covered by other pixels;
When said second control signal exported 0, after said current pixel moved, said current pixel was covered by other pixels.
6. the three-dimensional rendering device of various visual angles according to claim 2 is characterized in that said pixel is moved the unit and further comprised:
Status register is used to store empty flag bit;
The annular read-write memory is used to store said current pixel;
Pixel FIFO memory, the pixel that is used to store cavity position;
The write data controller is used for controlling according to said first control signal and second control signal write operation of said annular read-write memory, status register and pixel FIFO memory, when said first control signal exports 1; Then said current pixel is write said annular read-write memory; And,, then simultaneously said current pixel is write said pixel FIFO memory if said second control signal also exports 1 with said empty mark position 1; If said second control signal output 0; Then do not carry out the write operation of said pixel FIFO memory,, do not carry out any operation when said first control signal output 0.
7. the three-dimensional rendering device of various visual angles according to claim 6 is characterized in that said hole-filling unit further comprises:
Fetch interface is used for reading from said annular read-write memory successively reading said empty flag bit said current pixel and the said status register;
The cavity judgment sub-unit is used to judge said empty flag bit;
Fill up subelement, be used for filling up said video image, if said cavity sign place value is 1 according to the judged result of said empty flag bit; Then said pixel of reading is effective; Directly export said pixel, and said cavity sign place value is put 0, if said cavity sign place value is 0; Then said pixel of reading is invalid; The corresponding current location of said pixel is a cavity position, from said pixel FIFO memory, reads a pixel value, and the pixel value that obtains to fill up in the said cavity through linear difference according to the pixel value of the said cavity position left and right sides and with its output.
8. the three-dimensional rendering device of various visual angles according to claim 6 is characterized in that,
Confirm said annular read-write memory size according to said parallax value, and said annular read-write memory is at least said parallax value maximum magnitude value and adds 2 times after 1.
9. the three-dimensional rendering device of various visual angles according to claim 1 is characterized in that the transformational relation of said depth map and said disparity map further comprises:
According to the parallax value Disp of said disparity map and the depth value Depth of said depth map, change according to following formula,
Disp=f* (Depth-Dz), wherein Dz is zero viewpoint position, f is a parallax size adjustment parameter.
10. the three-dimensional rendering device of various visual angles according to claim 1 is characterized in that the disparity map generation module also comprises:
The parallax control signal is provided with the unit, is used for through system's setting or user said parallax control signal being set, and said parallax control signal comprises quantization parameter and quantitative formula, the size that the control disparity map generates.
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