CN102427547B - 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, particularly a kind of Multi-angle stereo rendering apparatus.
Background technology
In the shooting of three-dimensional video-frequency, manufacturing process, depth map has reflected that each pixel of a sub-picture and observer's distance is far and near.Depth map can obtain by different approach, passes through to pass through in Stereo matching, single-view videos image understanding algorithm etc. such as the depth finding instrument, in multi-angle video.Disparity map reflects for same object or scene, the difference that the observer embodies when observing under different visual angles, and human body produces third dimension because of these difference.In general, the disparity map that each visual angle observes is different, and the disparity map of different visual angles can obtain by depth map is processed through quantification, filtering etc.Therefore, playing up based on the solid of depth map is the vital step that three-dimensional video-frequency is made, processed.
Prior art generally adopts software to carry out the various visual angles solid and plays up, and the problem that prior art exists is, computing capability is limited, data carousel is wide not, particularly seems particularly outstanding in, a fairly large number of situation in visual angle high in video content resolution.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency.
For achieving the above object, the present invention proposes a kind of Multi-angle stereo rendering apparatus, comprise: the disparity map generation module, be used for receiver, video image and depth map corresponding to described video image, and described depth map conversion obtained the disparity map at a plurality of visual angles according to predetermined parallax control signal; And a plurality of renderers, the quantity of described renderer is identical with the quantity at described visual angle, and each renderer is respectively used to carry out image rendering to obtain the image at each visual angle according to disparity map and the described video image at each visual angle.
In one embodiment of the invention, described renderer further comprises: the disparity map pretreatment unit, be used for generating the first control signal and the second control signal according to parallax value and the described parallax control signal of described disparity map, wherein, the value of described the first control signal and described the second control signal is 0 or 1; Pixel is moved the unit, is used for according to described parallax value, the first control signal and the second control signal, the current pixel of described video image being moved, and obtains the empty flag bit of the corresponding position of described current pixel; And the hole-filling unit, be used for according to described empty flag bit, described current pixel being carried out hole-filling and with described empty flag bit zero clearing, and the video image of output after filling up.
In one embodiment of the invention, described disparity map pretreatment unit further comprises: the first register is used for storing the benchmark numerical value of parallax value; The second register is used for storing current parallax value; The state judgment sub-unit, be used for according to described benchmark numerical value and described current parallax value described the first control signal of output and described the second control signal, if described current parallax value is greater than described benchmark numerical value, described the first control signal output 1, described the second control signal output 1, if described current parallax value equals described benchmark numerical value, described the first control signal output 0, described the second control signal output 1, if described current parallax value is less than described benchmark numerical value, described the first control signal output 0, described the second control signal output 0.
In one embodiment of the invention, when described the first control signal output 1, after described current pixel was moved, the empty flag bit of described current pixel corresponding position was 0; When described the first control signal output 0, after described current pixel was moved, the empty flag bit of described current pixel corresponding position was 1.
In one embodiment of the invention, when described the second control signal exported 1, after described current pixel was moved, described current pixel was not covered by other pixels; When described the second control signal exported 0, after described current pixel was moved, described current pixel was covered by other pixels.
in one embodiment of the invention, described pixel is moved the unit and further comprised: status register is used for storing empty flag bit, the annular read-write memory is used for storing described current pixel, pixel FIFO memory, the pixel that is used for storing cavity position, write recording controller, be used for controlling described annular read-write memory according to described the first control signal and the second control signal, the write operation of status register and pixel FIFO memory, when described the first control signal exports 1, described current pixel is write described annular read-write memory, and with described empty mark position 1, if described the second control signal also exports 1, simultaneously described current pixel is write described pixel FIFO memory, if described the second control signal output 0, do not carry out the write operation of described pixel FIFO memory, when described the first control signal output 0, do not carry out any operation.
In one embodiment of the invention, described hole-filling unit further comprises: fetch interface is used for reading from described annular read-write memory successively and reads described empty flag bit described current pixel and described status register; The cavity judgment sub-unit is used for judging described empty flag bit; Fill up subelement, be used for filling up described video image according to the judged result of described empty flag bit, if described cavity sign place value is 1, described pixel of reading is effective, directly export described pixel, and described cavity sign place value is set to 0, if described cavity sign place value is 0, described pixel of reading is invalid, current location corresponding to described pixel is cavity position, read a pixel value from described pixel FIFO memory, and obtain the pixel value filled up in described cavity and with its output according to the calculated for pixel values of the described cavity position left and right sides.
In one embodiment of the invention, determine described annular read-write memory size according to described parallax value, and described annular read-write memory is at least described parallax value maximum magnitude value and adds after 12 times.
In one embodiment of the invention, the transformational relation of described depth map and described disparity map further comprises, according to the parallax value Disp of described disparity map and the depth value Depth of described depth map, change according to following formula, Disp=f* (Depth-Dz), wherein Dz is zero viewpoint position, and f is parallax size adjustment parameter.
In one embodiment of the invention, the disparity map generation module also comprises parallax control signal setting unit, be used for by system's setting or user, described parallax control signal being set, described parallax control signal comprises quantization parameter and quantitative formula, controls the size that disparity map generates.
Multi-angle stereo rendering apparatus according to the embodiment of the present invention, limited, the wide inadequate 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 by hardware configuration, and realize the parallel processing of each visual angle render process, computational process need not to be subject to computing capability, and the parameter in render process, pattern can be controlled by user flexibility.
The 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 by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the structural representation of the Multi-angle stereo rendering apparatus of the embodiment of the present invention;
Fig. 2 is the structural representation of the renderer of the embodiment of the present invention;
Fig. 3 is the structural representation of the disparity map pretreatment unit of the embodiment of the present invention;
Fig. 4 is the structural representation that the pixel of the embodiment of the present invention is moved the unit; And
Fig. 5 is the structural representation of the hole-filling unit of the embodiment of the present invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
Fig. 1 is the structural representation of the Multi-angle stereo rendering apparatus of the embodiment of the present invention.As shown in Figure 1, according to the Multi-angle stereo rendering apparatus of the embodiment of the present invention, comprise disparity map generation module 100 and a plurality of renderer 200.Wherein, disparity map generation module 100 is used for receiver, video image and depth map corresponding to video image, and depth map conversion is obtained the disparity map at a plurality of visual angles according to predetermined parallax control signal.A plurality of renderers 200, the quantity of renderer 200 is identical with the quantity at visual angle, and each renderer 200 is respectively used to carry out image rendering to obtain the image at each visual angle according to disparity map and the video image at each visual angle.
Particularly, disparity map generation module 100 is according to the parallax value Disp of disparity map and the depth value Depth of depth map, carry out depth map to the conversion of disparity map according to following formula, Disp=f* (Depth-Dz), wherein Dz is zero viewpoint position, f is parallax size adjustment parameter, and f can regulate voluntarily.
In one embodiment of the invention, disparity map generation module 100 also can comprise parallax control signal setting unit (not shown), be used for by system's setting or user, the parallax control signal being set, the parallax control signal comprises quantization parameter and quantitative formula, controls the size that disparity map generates.By parallax control signal setting unit, the parameter in the three-dimensional video-frequency render process, pattern can be controlled by user flexibility, also can be by system's setting.
Fig. 2 is the structural representation of the renderer of the embodiment of the present 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 the first control signal and the second control signal according to the parallax value of disparity map and parallax control signal, and wherein, the value of the first control signal and the second control signal is 0 or 1.Pixel is moved unit 220 and is used for according to parallax value, the first control signal and the second control signal, the current pixel of video image being moved, and obtains the empty flag bit of the corresponding position of current pixel.Hole-filling unit 230 is used for according to empty flag bit, current pixel being carried out hole-filling and with empty flag bit zero clearing, 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 present invention, and as shown in Figure 3, disparity map pretreatment unit 210 comprises the first register 221, the second register 222 and state judgment sub-unit 223.The first register 221 is used for the benchmark numerical value DispHistory of storage parallax value.The second register 222 is used for storing current parallax value CurrentDisp.state judgment sub-unit 223 is used for according to benchmark numerical value DispHistory and current parallax value CurrentDisp output the first control signal and the second control signal, if current parallax value CurrentDisp is greater than benchmark numerical value DispHistory, the first control signal output 1, the second control signal output 1, if current parallax value CurrentDisp equals benchmark numerical value DispHistory, the first control signal output 0, the second control signal output 1, if current parallax value CurrentDisp is less than benchmark numerical value DispHistory, the first control signal output 0, the second control signal output 0.
Can adjust as the case may be the value of benchmark numerical value DispHistory after each new parallax value CurrentDisp input, if for example current parallax value CurrentDisp is less than benchmark numerical value DispHistory, benchmark numerical value DispHistory subtracts one, otherwise current parallax value CurrentDisp is assigned to benchmark numerical value DispHistory.Wherein the initial value of benchmark numerical value DispHistory is the parallax value of every first pixel of row image.
In one embodiment of the invention, when the first control signal output 1, after current pixel was moved, the empty flag bit of current pixel corresponding position was 0.When the first control signal output 0, after current pixel was moved, the empty flag bit of current pixel corresponding position was 1.
In one embodiment of the invention, when the second control signal exported 1, after current pixel was moved, current pixel was not covered by other pixels.When the second control signal exported 0, after current pixel was moved, current pixel was covered by other pixels.
Fig. 4 is the structural representation that the pixel of the embodiment of the present invention is moved the unit.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 recording controller 224.Status register 222 is used for storing empty flag bit.Annular read-write memory 222 is used for the storage current pixel.Pixel FIFO memory 223 is used for the pixel of storage cavity position.writing recording controller 224 is used for controlling annular read-write memory 222 according to the first control signal and the second control signal, the write operation of status register 221 and pixel FIFO memory 223, when the first control signal exports 1, current pixel is write annular read-write memory 222, and with empty mark position 1, if the second control signal also exports 1, simultaneously with current pixel writing pixel FIFO memory 223, if the second control signal output 0, do not carry out the write operation of pixel FIFO memory, when the 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 determined by the magnitude range of parallax value, suppose the parallax value scope for-DM～+ DM, the actual size of annular read-write memory 222 is at least 2* (DM+1).The read data mouth of annular read-write memory 222 determines with the basic address of the read/write address of writing data port by a circulation change, the address, basis is BaseAddress, since 0, each clock cycle increases progressively 1, arriving after annular read-write memory 222 maximum address makes zero 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, read data port address ReadAddress and write data port address WriteAddress and calculate according to following formula
ReadAddress＝BaseAddress，
WriteAddress=ModL (BaseAddress+DM+ parallax value)
Wherein, Mod refers to the data in 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 present 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 status register 221 from annular read-write memory 222 successively reads empty flag bit.Cavity judgment sub-unit 232 is used for judging empty flag bit.Fill up subelement 233, be used for filling up described video image according to the judged result of empty flag bit, if cavity sign place value is 1, the pixel of reading is effective, direct output pixel, and the cavity is indicated that place value sets to 0, if cavity sign place value is 0, the pixel of reading is invalid, current location corresponding to pixel is cavity position, read a pixel value from pixel FIFO memory 223, and obtain the pixel value filled up in the cavity and with its output, for example utilize the method for linear interpolation according to the pixel value of the cavity position left and right sides.
Multi-angle stereo rendering apparatus according to the embodiment of the present invention, limited, the wide inadequate 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 by hardware configuration, and realize the parallel processing of each visual angle render process, computational process need not to be subject to computing capability, and the parameter in render process, pattern can be controlled by user flexibility.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (6)
1. a Multi-angle stereo rendering apparatus, is characterized in that, comprising:
The disparity map generation module is used for receiver, video image and depth map corresponding to described video image, and described depth map conversion is obtained the disparity map at a plurality of visual angles according to predetermined parallax control signal; And
A plurality of renderers, the quantity of described renderer is identical with the quantity at described visual angle, and each renderer is respectively used to carry out image rendering to obtain the image at each visual angle according to disparity map and the described video image at each visual angle, and described renderer further comprises:
The disparity map pretreatment unit, be used for generating the first control signal and the second control signal according to parallax value and the described parallax control signal of described disparity map, wherein, the value of described the first control signal and described the second control signal is 0 or 1, and described disparity map pretreatment unit further comprises:
The first register is used for storing the benchmark numerical value of parallax value,
The second register is used for storing current parallax value,
The state judgment sub-unit, be used for according to described benchmark numerical value and described current parallax value described the first control signal of output and described the second control signal, if described current parallax value is greater than described benchmark numerical value, described the first control signal output 1, described the second control signal output 1, if described current parallax value equals described benchmark numerical value, described the first control signal output 0, described the second control signal output 1, if described current parallax value is less than described benchmark numerical value, described the first control signal output 0, described the second control signal output 0;
Pixel is moved the unit, be used for according to described parallax value, the first control signal and the second control signal, the current pixel of described video image being moved, and obtain the empty flag bit of the corresponding position of described current pixel, described pixel is moved the unit and is further comprised:
Status register is used for storing empty flag bit,
The annular read-write memory is used for storing described current pixel,
Pixel FIFO memory, the pixel that is used for storing cavity position,
write recording controller, be used for controlling described annular read-write memory according to described the first control signal and the second control signal, the write operation of status register and pixel FIFO memory, when described the first control signal exports 1, described current pixel is write described annular read-write memory, and with described empty mark position 1, if described the second control signal also exports 1, simultaneously described current pixel is write described pixel FIFO memory, if described the second control signal output 0, do not carry out the write operation of described pixel FIFO memory, when described the first control signal output 0, do not carry out any operation, and
The hole-filling unit is used for according to described empty flag bit, described current pixel being carried out hole-filling and with described empty flag bit zero clearing, and the video image of output after filling up, and described hole-filling unit further comprises:
Fetch interface is used for reading from described annular read-write memory successively and reads described empty flag bit described current pixel and described status register,
The cavity judgment sub-unit is used for judging described empty flag bit,
fill up subelement, be used for filling up described video image according to the judged result of described empty flag bit, if described cavity sign place value is 1, described pixel of reading is effective, directly export described pixel, and described cavity sign place value is set to 0, if described cavity sign place value is 0, described pixel of reading is invalid, current location corresponding to described pixel is cavity position, read a pixel value from described pixel FIFO memory, and obtain by linear difference the pixel value filled up in described cavity according to the pixel value of the described cavity position left and right sides and with its output.
2. Multi-angle stereo rendering apparatus according to claim 1, is characterized in that,
When described the first control signal output 1, after described current pixel was moved, the empty flag bit of described current pixel corresponding position was 0;
When described the first control signal output 0, after described current pixel was moved, the empty flag bit of described current pixel corresponding position was 1.
3. Multi-angle stereo rendering apparatus according to claim 1, is characterized in that,
When described the second control signal exported 1, after described current pixel was moved, described current pixel was not covered by other pixels;
When described the second control signal exported 0, after described current pixel was moved, described current pixel was covered by other pixels.
4. Multi-angle stereo rendering apparatus according to claim 1, is characterized in that,
Determine described annular read-write memory size according to described parallax value, and described annular read-write memory is at least described parallax value maximum magnitude value and adds after 12 times.
5. Multi-angle stereo rendering apparatus according to claim 1, is characterized in that, the transformational relation of described depth map and described disparity map further comprises:
According to the parallax value Disp of described disparity map and the depth value Depth of described depth map, change according to following formula,
Disp=f* (Depth-Dz), wherein Dz is zero viewpoint position, f is parallax size adjustment parameter.
6. Multi-angle stereo rendering apparatus according to claim 1, is characterized in that, the disparity map generation module also comprises:
Parallax control signal setting unit is used for by system's setting or user, described parallax control signal being set, and described parallax control signal comprises quantization parameter and quantitative formula, controls the size that disparity map generates.
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| CN103873841A (en) * | 2012-12-14 | 2014-06-18 | 冠捷显示科技（厦门）有限公司 | Stereo display system and method for automatically adjusting display depth of image |
| CN103150729B (en) * | 2013-03-04 | 2015-12-23 | 清华大学 | A kind of virtual view rendering intent |
| CN105069832B (en) * | 2015-08-13 | 2017-12-12 | 中国航空工业集团公司西安飞机设计研究所 | Rendering intent during a kind of operation towards variable display elements |
| CN111432194B (en) * | 2020-03-11 | 2021-07-23 | 北京迈格威科技有限公司 | Disparity map hole filling method and device, electronic equipment and storage medium |
| CN114418887B (en) * | 2022-01-19 | 2022-12-20 | 北京百度网讯科技有限公司 | Image enhancement method and device, electronic equipment and storage medium |
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