CN106550238B - A kind of image processing method and system - Google Patents
A kind of image processing method and system Download PDFInfo
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- CN106550238B CN106550238B CN201510589185.9A CN201510589185A CN106550238B CN 106550238 B CN106550238 B CN 106550238B CN 201510589185 A CN201510589185 A CN 201510589185A CN 106550238 B CN106550238 B CN 106550238B
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Abstract
The present invention provides a kind of image processing method and system, passes through default pixel filling rule；Each root tuber to be decoded is enabled to generate corresponding adjacent rank reference pixel according to the same pixel filling rule, wherein the central point of each adjacent rank reference pixel filling is unified；It enables an interpolation calculation unit according to an identical selection rule, chooses adjacent rank reference pixel corresponding with each described to be decoded piece from each adjacent rank reference pixel；It enables the interpolation calculation unit be calculated according to the selected adjacent rank reference pixel and obtains corresponding prediction block.The selection process for having unified the adjacent rank pixel of interpolation calculation module eliminates the logical code for carrying out pixel selection according to different size of prediction block, reduces the area of interpolation calculation module, reduce the operation power consumption of related hardware module.
Description
Technical field
The present invention relates to field of image processings, more particularly to a kind of image processing method and system.
Background technique
The size of the intra-frame prediction block of HEVC is respectively 4x4,8x8,16x16,32x32, the reference of every kind of prediction block sizes
For pixel arrangement as shown in Figure 1, used number of pixels is 4x nSize+1, nSize numerical value is 4,8,16,32.
If the adjacent rank reference pixel of different size of prediction block is all arranged since position 0, by taking 4x4 and 8x8 as an example, such as
Shown in lower Fig. 2, the center pixel of the block of 4x4 size is located at position 8, and as shown in figure 3,8x8 size prediction block center pixel
Positioned at position 16.So just thering is the position of 4 kinds of different adjacent rank reference pixels to arrange if there is 4 kinds of different size of prediction blocks
Cloth, subsequent interpolation calculation module is when carrying out the pixel selection of different size of prediction block, it is necessary to 4 sets of different ground
Location selection unit is used to choose the adjacent rank reference pixel value of corresponding size, this will increase the burden of operation and reduces efficiency.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of image processing method and it is
System, for solving the problems, such as the heavy load and inefficiency of intra-frame prediction block acquisition in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of image processing method, comprising the following steps:
Default pixel filling rule；Each root tuber to be decoded is enabled to generate corresponding adjacent rank reference image according to the same pixel filling rule
Element, wherein the central point of each adjacent rank reference pixel filling is unified；An interpolation calculation unit is enabled to be advised according to an identical selection
Then, adjacent rank reference pixel corresponding with each described to be decoded piece is chosen from each adjacent rank reference pixel；Enable the interpolation
Computing unit calculates according to the selected adjacent rank reference pixel and obtains corresponding prediction block.
Optionally, the central point is obtained according to maximum to be decoded piece.
Optionally, the adjacent rank reference pixel is distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right.
Optionally, the prediction block by the adjacent rank reference pixel be distributed in be decoded piece of the lower-left, a left side, upper left,
The combination of pixels of upper and upper right decoded completion forms.
Optionally, when the adjacent rank reference pixel includes 4x4,8x8,16x16,32x32, each adjacent rank reference pixel
Central point be 64.
In order to achieve the above objects and other related objects, the present invention also provides a kind of image processing systems, comprising: filling rule
Then setup module, for presetting pixel filling rule；Adjacent rank reference pixel generation module, for enabling each root tuber to be decoded according to same
The one pixel filling rule generates corresponding adjacent rank reference pixel, wherein the central point of each adjacent rank reference pixel filling
It is unified；Adjacent rank reference pixel chooses module, to enable an interpolation calculation unit according to an identical selection rule, from each neighbour
Adjacent rank reference pixel corresponding with each described to be decoded piece is chosen in rank reference pixel；Prediction block obtains module, to enable
It states interpolation calculation unit and the corresponding prediction block of acquisition is calculated according to the selected adjacent rank reference pixel.
Optionally, the adjacent rank reference pixel obtains module to obtain the central point according to maximum to be decoded piece.
Optionally, the adjacent rank reference pixel is distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right.
Optionally, the prediction block by the adjacent rank reference pixel be distributed in be decoded piece of the lower-left, a left side, upper left,
The combination of pixels of upper and upper right decoded completion forms.
Optionally, when the adjacent rank reference pixel includes 4x4,8x8,16x16,32x32, each adjacent rank reference pixel
Central point be 64.
As described above, a kind of image processing method of the invention and system, pass through default pixel filling rule；Enable respectively to
Decoding block generates corresponding adjacent rank reference pixel according to the same pixel filling rule, wherein each adjacent rank reference pixel
The central point of filling is unified；Enable an interpolation calculation unit according to an identical selection rule, from each adjacent rank reference pixel
Choose adjacent rank reference pixel corresponding with each described to be decoded piece；Enable the interpolation calculation unit according to the selected neighbour
Rank reference pixel, which calculates, obtains corresponding prediction block.The selection process for having unified the adjacent rank pixel of interpolation calculation module, eliminates
The logical code that pixel selection is carried out according to different size of prediction block, reduces the area of interpolation calculation module, reduces phase
Close the operation power consumption of hardware module.
Detailed description of the invention
Fig. 1 is shown as HEVC intra prediction neighbour rank pixel arrangement schematic diagram in an embodiment.
Fig. 2 is shown as 4x4 intra-frame prediction block neighbour rank pixel arrangement schematic diagram in an embodiment.
Fig. 3 is shown as 8x8 intra-frame prediction block neighbour rank pixel arrangement schematic diagram in an embodiment.
Fig. 4 is shown as the flow diagram of image processing method of the invention in one embodiment.
Fig. 5 is shown as illustrating with intra-frame prediction block neighbour's rank pixel arrangement of image processing method or system of the invention
Figure.
Fig. 6 is shown as the module diagram of image processing system of the invention in one embodiment.
Component label instructions
1 image processing system
11 fill rule setup modules
12 adjacent rank reference pixel generation modules
13 adjacent rank reference pixels choose module
14 prediction blocks obtain module
S11~S14 step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in diagram then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Referring to Fig. 4, being shown as the flow diagram of image processing method of the invention in one embodiment.It is described
Image processing method can be operated based on multiple video processing protocols, be based on HEVC agreement below with described image processing method
It is specifically described.
It the described method comprises the following steps:
S11: default pixel filling rule；
S12: each root tuber to be decoded is enabled to generate corresponding adjacent rank reference pixel according to the same pixel filling rule, wherein
The central point of each adjacent rank reference pixel filling is unified；The i.e. described fill rule is, all will be with no matter to be decoded piece of size
Corresponding reference pixel to be decoded is filled into the unified reference pixel array of a central point.Preferably, according to maximum wait solve
Code block obtains the central point, i.e., the central point of the adjacent rank reference pixel generated with maximum to be decoded piece is each to be decoded piece and adopted
Central point, the central point are the upper left position point of image reference pixel.
S13: enabling an interpolation calculation unit according to an identical selection rule, chosen from each adjacent rank reference pixel with
Each described to be decoded piece corresponding adjacent rank reference pixel；Wherein, when described image processing method is based on HEVC agreement, the choosing
Taking rule is the arrangement mode of reference pixel specified in HEVC agreement.And correspondingly, in HEVC agreement, neighbour's rank reference image
Element is distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right.It is left if lower-left, upper left, on and upper right in
Pixel there is no either not yet decode, HEVC agreement defines the rule of filling.Rule is as follows: first checking for the lower left corner most
Whether pixel on the lower is effective, if in vain, it is according to this upwards, (backward to upper left point since the pixel of the lower left corner most on the lower
It is right) find available point, filling to the point.If all point is all invalid, which fills out 128.After completing the point of the lower left corner most on the lower,
Whether (after to upper left point to the right) that reference point is examined successively is effective upwards since the point, if in vain, it will be following, the left side
Point filling is to the point, until checking the last one reference image vegetarian refreshments of upper right.
S14: it enables the interpolation calculation unit be calculated according to the selected adjacent rank reference pixel and obtains corresponding prediction
Block.The prediction block is distributed in be decoded piece of a lower-left, left side, upper left, upper and upper right by the adjacent rank reference pixel
The combination of pixels of decoded completion forms.After generating the prediction block, the residual block come out with decoding is added, and is just weighed
Building block, reconstructed blocks are the final image block that user needs.
For example, with reference to Fig. 5, being shown as the intra-frame prediction block with of the invention based on HEVC in a certain embodiment and obtaining
Intra-frame prediction block neighbour's rank pixel arrangement schematic diagram of method.It is seen that when the adjacent rank reference pixel include 4x4,
When 8x8,16x16,32x32, it is filled according to the same pixel filling rule, and each adjacent rank reference pixel filling
Central point is unified in the central point 64 of maximum to be decoded piece of adjacent rank reference pixel.Need subsequent computing module only
Fixed point is chosen according to identical rule to be calculated, and the efficiency of calculating can be improved, mitigate the energy consumption of computing module.
Referring to Fig. 6, it is shown as the module diagram of image processing system of the invention in one embodiment, it is described
It includes fill rule setup module 11, adjacent rank reference pixel generation module 12, neighbour that intra-frame prediction block based on HEVC, which obtains system 1,
Rank reference pixel chooses module 13 and prediction block obtains module 14.Described image processing system 1 can be handled based on multiple videos
Agreement is operated, and is based on HEVC agreement below with described image processing system 1 and is specifically described.
The fill rule setup module 11 is for presetting pixel filling rule；The fill rule is, no matter wait solve
The size of code block will be all filled into the unified reference pixel array of a central point with corresponding reference pixel to be decoded.
Neighbour's rank reference pixel generation module 12 is for enabling each root tuber to be decoded raw according to the same pixel filling rule
At corresponding adjacent rank reference pixel, wherein the central point of each adjacent rank reference pixel filling is unified；Preferably, the adjacent rank
Reference pixel generation module 12 obtains the central point, i.e., the neighbour generated with maximum to be decoded piece according to maximum to be decoded piece
The central point of rank reference pixel is the central point of each to be decoded piece use, and the central point is the upper left corner position of image reference pixel
It sets a little.
Neighbour's rank reference pixel chooses module 13 to enable an interpolation calculation unit according to an identical selection rule, from
Adjacent rank reference pixel corresponding with each described to be decoded piece is chosen in each adjacent rank reference pixel；Wherein, the selection rule
It is then the arrangement mode of reference pixel specified in HEVC agreement.And specifically, in HEVC agreement, neighbour's rank reference pixel
Be distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right, left if lower-left, upper left, on and upper right in
For pixel there is no either not yet decoding, HEVC agreement defines the rule of filling.Rule it is as follows: first check for the lower left corner near
Under pixel it is whether effective, if in vain, it is according to this upwards, (backward to upper left point since the pixel of the lower left corner most on the lower
It is right) find available point, filling to the point.If all point it is all invalid, the point fill out 128. complete the point of the lower left corner most on the lower after,
Whether (after to upper left point to the right) that reference point is examined successively is effective upwards since the point, if in vain, it will be following, the left side
Point filling is to the point, until checking the last one reference image vegetarian refreshments of upper right.
The prediction block obtains module 14 to enable the interpolation calculation unit according to the selected adjacent rank reference image
Element, which calculates, obtains corresponding prediction block, the prediction block by the adjacent rank reference pixel be distributed in be decoded piece of the lower-left,
A left side, upper left, upper and upper right decoded completion combination of pixels form.
For example, with reference to Fig. 5, being shown as with image processing method method of the invention in a specific embodiment or being
Intra-frame prediction block neighbour's rank pixel arrangement schematic diagram of system.It is seen that when the adjacent rank reference pixel include 4x4,8x8,
It when 16x16,32x32, is filled according to the same pixel filling rule, and the center of each adjacent rank reference pixel filling
Point is unified in the central point 64 of maximum to be decoded piece of adjacent rank reference pixel.Make so subsequent computing module only need according to
Identical rule is chosen fixed point and is calculated, and the efficiency of calculating can be improved, reduce the power consumption of computing module.
In conclusion a kind of image processing method of the invention and system, pass through default pixel filling rule；Enable respectively to
Decoding block generates corresponding adjacent rank reference pixel according to the same pixel filling rule, wherein each adjacent rank reference pixel
The central point of filling is unified；Enable an interpolation calculation unit according to an identical selection rule, from each adjacent rank reference pixel
Choose adjacent rank reference pixel corresponding with each described to be decoded piece；Enable the interpolation calculation unit according to the selected neighbour
Rank reference pixel, which calculates, obtains corresponding prediction block.The selection process for having unified the adjacent rank pixel of interpolation calculation module, eliminates
The logical code that pixel selection is carried out according to different size of prediction block, reduces the area of interpolation calculation module, reduces phase
Close the operation power consumption of hardware module.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial benefit
With value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of image processing method, which comprises the following steps:
Default pixel filling rule；Wherein, no matter the size that the fill rule is to be decoded piece, all will to it is to be decoded corresponding
Reference pixel be filled into the unified reference pixel array of a central point；What the central point was generated with maximum to be decoded piece
The central point of adjacent rank reference pixel is the central point of each to be decoded piece use；
Each root tuber to be decoded is enabled to generate corresponding adjacent rank reference pixel according to the same pixel filling rule, wherein each neighbour
The central point of rank reference pixel filling is unified；It is described neighbour rank reference pixel be distributed in be decoded piece of the lower-left, a left side, upper left,
Upper and upper right；
Enable an interpolation calculation unit according to an identical selection rule, chosen from each adjacent rank reference pixel with it is each it is described to
The corresponding adjacent rank reference pixel of decoding block；
It enables the interpolation calculation unit be calculated according to the selected adjacent rank reference pixel and obtains corresponding prediction block.
2. image processing method according to claim 1, it is characterised in that: obtained in described according to maximum to be decoded piece
Heart point.
3. image processing method according to claim 1, it is characterised in that: the prediction block is by the adjacent rank reference pixel
Be distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right decoded completion combination of pixels form.
4. image processing method according to claim 1, it is characterised in that: when the block of pixels packet of the adjacent rank reference pixel
When including 4x4,8x8,16x16,32x32, the central point of each adjacent rank reference pixel is 64.
5. a kind of image processing system characterized by comprising
Fill rule setup module, for presetting pixel filling rule；Wherein, no matter the fill rule is to be decoded piece
Size will be all filled into the unified reference pixel array of a central point with corresponding reference pixel to be decoded；The central point
The central point of the adjacent rank reference pixel generated with maximum to be decoded piece is the central point of each to be decoded piece use；
Adjacent rank reference pixel generation module, for enabling each root tuber to be decoded generate corresponding neighbour according to the same pixel filling rule
Rank reference pixel, wherein the central point of each adjacent rank reference pixel filling is unified；Neighbour's rank reference pixel is distributed in described
To be decoded piece of lower-left, a left side, upper left, upper and upper right；
Adjacent rank reference pixel chooses module, to enable an interpolation calculation unit according to an identical selection rule, from each neighbour
Adjacent rank reference pixel corresponding with each described to be decoded piece is chosen in rank reference pixel；
Prediction block obtains module, obtains to enable the interpolation calculation unit be calculated according to the selected adjacent rank reference pixel
Corresponding prediction block.
6. image processing system according to claim 5, it is characterised in that: it is described neighbour rank reference pixel generation module to
The central point is obtained according to maximum to be decoded piece.
7. image processing system according to claim 5, it is characterised in that: the prediction block is by the adjacent rank reference pixel
Be distributed in be decoded piece of the lower-left, a left side, upper left, upper and upper right decoded completion combination of pixels form.
8. image processing system according to claim 5, it is characterised in that: when the block of pixels packet of the adjacent rank reference pixel
When including 4x4,8x8,16x16,32x32, the central point of each adjacent rank reference pixel is 64.
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| CN101610417A (en) * | 2009-07-09 | 2009-12-23 | 华为技术有限公司 | A kind of image filling method, device and equipment |
| CN104363459A (en) * | 2014-10-29 | 2015-02-18 | 复旦大学 | Hardware filling method applicable to infra-frame prediction reference pixels in HEVC (high efficiency video coding) standard |
| CN104602009A (en) * | 2010-07-31 | 2015-05-06 | M&K控股株式会社 | Intra prediction decoding apparatus |
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| CN101610417A (en) * | 2009-07-09 | 2009-12-23 | 华为技术有限公司 | A kind of image filling method, device and equipment |
| CN104602009A (en) * | 2010-07-31 | 2015-05-06 | M&K控股株式会社 | Intra prediction decoding apparatus |
| CN104363459A (en) * | 2014-10-29 | 2015-02-18 | 复旦大学 | Hardware filling method applicable to infra-frame prediction reference pixels in HEVC (high efficiency video coding) standard |
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Address after: 350000 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee after: Ruixin Microelectronics Co., Ltd Address before: 350003 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee before: Fuzhou Rockchips Electronics Co.,Ltd. |