CN105208392B - A kind of method and apparatus being compressed to image - Google Patents
A kind of method and apparatus being compressed to image Download PDFInfo
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- CN105208392B CN105208392B CN201510599340.5A CN201510599340A CN105208392B CN 105208392 B CN105208392 B CN 105208392B CN 201510599340 A CN201510599340 A CN 201510599340A CN 105208392 B CN105208392 B CN 105208392B
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Abstract
The embodiment of the invention discloses a kind of method and apparatus being compressed to image, belong to field of computer technology.The described method includes：The first data block after target image quantification treatment is obtained, and first data block is divided into the data sub-block of pre-set dimension；According to default sub-block traversal order, whether judge the absolute value of the quantized value for the pixel that each data sub-block includes successively is the first default value with value, when determining that the first data sub-block is corresponding and value is first default value, according to the sub-block traversal order, the data sub-block before first data sub-block is determined；The quantized value of the pixel included to the data sub-block before first data sub-block is compressed processing.Using the present invention, the efficiency for compressing image can be improved.
Description
Technical field
The present invention relates to field of computer technology, more particularly to a kind of method and apparatus being compressed to image.
Background technology
With the development of computer technology, computer application is more and more extensively sent out, and function is also stronger and stronger.People can be with
Video is compressed by computer, to carry out video data transmission.
When being compressed to video, the pixel in each frame can be divided, obtain multiple original pixels blocks,
Then each original can be obtained according to the original pixels block of division and default prediction algorithm (such as infra-frame prediction and inter prediction)
The corresponding prediction pixel block of beginning block of pixels, then original pixels block is subtracted each other with corresponding prediction pixel block, obtain the original pixels
The corresponding residual block of block, then can carry out DCT (Discrete Cosine Transform, discrete cosine to each residual block
Conversion) and quantification treatment, determine the corresponding quantized value of each pixel, obtain the data block after quantification treatment.Computer can incite somebody to action
Data block after quantification treatment is divided into the data sub-block of pre-set dimension, such as the data sub-block of 4*4, for a data sub-block,
The method for the traversal that computer can use, whether the quantized value for judging the pixel that the data sub-block includes is 0, and computer can
Traveled through with the total data sub-block included to some data block, so that it is determined that the pixel of last quantized value non-zero,
Then the position of data sub-block within the data block belonging to the pixel, and the position of the pixel within the data block can be determined
Put, and then obtain the quantized value of the pixel before the pixel, then the quantized value got is compressed.For the picture
Pixel after vegetarian refreshments, since the quantized value of these pixels is all zero, computer need not click through these pixels
Row processing.Computer can record the size of the data sub-block, and when being unziped it to the data sub-block, terminal can pass through
Decompression obtains the quantized value of the pixel before the pixel, then using 0 as rest of pixels point quantized value.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：
All data sub-blocks that computer needs to include data block travel through, and just can determine that last quantized value is non-
Zero pixel, is then compressed image, so image can be compressed less efficient.
The content of the invention
In order to solve problem of the prior art, an embodiment of the present invention provides a kind of method being compressed to image and dress
Put.The technical solution is as follows：
First aspect, there is provided a kind of method being compressed to image, the described method includes：
The first data block after target image quantification treatment is obtained, and first data block is divided into pre-set dimension
Data sub-block；
According to default sub-block traversal order, judge successively the pixel that each data sub-block includes quantized value it is exhausted
Whether it is the first default value to value and value, until determining that the first data sub-block is corresponding and value is first default value
When, according to the sub-block traversal order, determine the data sub-block before first data sub-block；
The quantized value of the pixel included to the data sub-block before first data sub-block is compressed processing.
Optionally, the quantized value for the pixel that the data sub-block to before first data sub-block includes is pressed
Contracting is handled, including：
In the total data sub-block before first data sub-block, adjacent with first data sub-block the is determined
Two data sub-blocks；
According to default pixel traversal order, last quantized value and second is determined in second data sub-block
Different first pixel of default value；
According to the pixel traversal order, the pixel before the first pixel described in second data sub-block is determined
The quantized value of point；
The quantized value of the pixel included to the data sub-block before second data sub-block, and second data
The quantized value of pixel described in sub-block before the first pixel is compressed processing.
In this way, can more accurately obtain needs the quantized value for being compressed processing.
Optionally, it is described according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Quantized value absolute value and value whether be the first default value, including：
The correspondence of the pixel number that data block according to prestoring includes and sub-block traversal order, determines described
The corresponding first sub-block traversal order of pixel number that first data block includes；
According to the first sub-block traversal order, the quantized value for the pixel that each data sub-block includes is judged successively
Whether absolute value is the first default value with value.
In this way, accurate sub-block traversal order can be obtained, prevent from malfunctioning.
Optionally, the method further includes：
According to the former processing sequence of the pixel in compression process, included to each data sub-block, and to described each
The target processing sequence for the pixel that data sub-block includes, the pixel included to the data sub-block before first data sub-block
Point is resequenced.
In this way, the efficiency that processing is compressed to image can be improved.
Optionally, first data block obtained after target image quantification treatment, including：
The first block of pixels is obtained in the target image；
By the prediction algorithm prestored, corresponding first prediction block of first block of pixels is determined；
Determine the pixel value of each pixel and each pixel in first prediction block in first block of pixels
The difference of pixel value, obtains the first residual block, carries out discrete cosine transform and quantification treatment to first residual block, obtains
To corresponding first data block of first residual block.
Optionally, first default value is 0.
Second aspect, there is provided a kind of device being compressed to image, described device include：
Acquisition module, draws for obtaining the first data block after target image quantification treatment, and by first data block
It is divided into the data sub-block of pre-set dimension；
Judgment module, for according to default sub-block traversal order, judging the pixel that each data sub-block includes successively
Whether the absolute value of the quantized value of point is the first default value with value, until determining that the first data sub-block is corresponding and value is institute
When stating the first default value, according to the sub-block traversal order, the data sub-block before first data sub-block is determined；
Compression module, the quantized value of the pixel for being included to the data sub-block before first data sub-block carry out
Compression is handled.
Optionally, the compression module, including：
First determination sub-module, in the total data sub-block before first data sub-block, determine with it is described
The second adjacent data sub-block of first data sub-block；
Second determination sub-module, for according to default pixel traversal order, being determined in second data sub-block
Last quantized value and different first pixel of the second default value；
3rd determination sub-module, for according to the pixel traversal order, determining described in second data sub-block
The quantized value of pixel before first pixel；
Submodule is compressed, for the quantized value of the pixel included to the data sub-block before second data sub-block,
And the quantized value of the pixel described in second data sub-block before the first pixel is compressed processing.
In this way, can more accurately obtain needs the quantized value for being compressed processing.
Optionally, the judgment module, including：
4th determination sub-module, for the pixel number and sub-block traversal order included according to the data block prestored
Correspondence, determine the corresponding first sub-block traversal order of pixel number that first data block includes；
Judging submodule, for according to the first sub-block traversal order, judging what each data sub-block included successively
Whether the absolute value of the quantized value of pixel is the first default value with value.
In this way, accurate sub-block traversal order can be obtained, prevent from malfunctioning.
Optionally, described device further includes：
Sorting module, for the former processing sequence according to the pixel in compression process, included to each data sub-block,
And the target processing sequence of the pixel included to each data sub-block, to data before first data sub-block
The pixel that block includes is resequenced.
In this way, the efficiency that processing is compressed to image can be improved.
Optionally, the acquisition module, including：
First acquisition submodule, for obtaining the first block of pixels in the target image；
5th determination sub-module, for the prediction algorithm by prestoring, determines first block of pixels corresponding
One prediction block；
6th determination sub-module, for determining in first block of pixels pixel value of each pixel and described first pre-
The difference of the pixel value of each pixel in block is surveyed, obtains the first residual block, discrete cosine change is carried out to first residual block
DCT and quantification treatment are changed, obtains corresponding first data block of first residual block.
Optionally, first default value is 0.
The beneficial effect that technical solution provided in an embodiment of the present invention is brought is：
In the embodiment of the present invention, the first data block after target image quantification treatment is obtained, and the first data block is divided
Into the data sub-block of pre-set dimension, according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Whether the absolute value of quantized value is the first default value with value, until determining that the first data sub-block is corresponding and value is pre- for first
If during numerical value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined, before the first data sub-block
The quantized value for the pixel that data sub-block includes is compressed processing, in this way, during being compressed to target image, nothing
All data sub-blocks that need to be included to data block travel through, it is possible to quantized value to be compressed are determined, so as to improve pressure
The efficiency of contract drawing picture.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of method flow diagram being compressed to image provided in an embodiment of the present invention；
Fig. 2 is seed block traversal order schematic diagram provided in an embodiment of the present invention；
Fig. 3 is seed block traversal order schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of pixel traversal order schematic diagram provided in an embodiment of the present invention；
Fig. 5 is a kind of pixel traversal order schematic diagram provided in an embodiment of the present invention；
Fig. 6 is a kind of pixel traversal order schematic diagram provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram to pixel rearrangement provided in an embodiment of the present invention；
Fig. 8 is a kind of schematic diagram to pixel rearrangement provided in an embodiment of the present invention；
Fig. 9 is a kind of apparatus structure schematic diagram being compressed to image provided in an embodiment of the present invention；
Figure 10 is a kind of apparatus structure schematic diagram being compressed to image provided in an embodiment of the present invention；
Figure 11 is a kind of apparatus structure schematic diagram being compressed to image provided in an embodiment of the present invention；
Figure 12 is a kind of apparatus structure schematic diagram being compressed to image provided in an embodiment of the present invention；
Figure 13 is a kind of apparatus structure schematic diagram being compressed to image provided in an embodiment of the present invention；
Figure 14 is a kind of structure diagram of terminal provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
An embodiment of the present invention provides a kind of method being compressed to image, as shown in Figure 1, the process flow of this method
It can include the steps：
Step 101, the first data block after target image quantification treatment is obtained, and the first data block is divided into default ruler
Very little data sub-block.
Step 102, according to default sub-block traversal order, the quantized value for the pixel that each data sub-block includes is judged successively
Absolute value and value whether be the first default value, until determine the first data sub-block it is corresponding and be worth be the first default value
When, according to sub-block traversal order, determine the data sub-block before the first data sub-block.
Step 103, the quantized value of the pixel included to the data sub-block before the first data sub-block is compressed processing.
In the embodiment of the present invention, the first data block after target image quantification treatment is obtained, and the first data block is divided
Into the data sub-block of pre-set dimension, according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Whether the absolute value of quantized value is the first default value with value, until determining that the first data sub-block is corresponding and value is pre- for first
If during numerical value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined, before the first data sub-block
The quantized value for the pixel that data sub-block includes is compressed processing, in this way, during being compressed to target image, nothing
All data sub-blocks that need to be included to data block travel through, it is possible to quantized value to be compressed are determined, so as to improve pressure
The efficiency of contract drawing picture.
Embodiment two
An embodiment of the present invention provides a kind of method being compressed to image, the executive agent of this method is terminal.Its
In, terminal can be provided with the terminal of the application program for compressing image.The terminal can include processor and memory,
The absolute value and value for the quantized value of pixel that each data sub-block that processor is determined for division includes, and then can be with
Being searched based on determine and value needs to be compressed the data sub-block of processing, and it is suitable that memory can be used for storage sub-block traversal
Sequence, and pixel traversal order, can also store the data needed in following processing procedures and the data of generation.In addition,
The terminal can also include the components such as input unit, sensor, voicefrequency circuit and power supply.
Below in conjunction with embodiment, the process flow shown in Fig. 1 is described in detail, content can be as
Under：
Step 101, the first data block after target image quantification treatment is obtained, and the first data block is divided into default ruler
Very little data sub-block.
In force, user can have the function of the application program of compression of images in terminal installation, such as HEVC (High
Efficiency Video Coding, efficient video coding) encoder application program, image to be compressed can be video.
When user needs to be compressed some image, user can open the application program in terminal, then can be in the application
Selection needs the image being compressed in program, clicks on compression options, and the compression that terminal can then receive corresponding target image refers to
Order, then can obtain data block (i.e. the first data block) in the target image.
Optionally, the process of terminal acquisition data block can be as follows：The first block of pixels is obtained in the target image；By pre-
The prediction algorithm first stored, determines corresponding first prediction block of the first block of pixels；Determine each pixel in the first block of pixels
The difference of the pixel value of each pixel, obtains the first residual block in pixel value and the first prediction block, and the first residual block is carried out
DCT and quantification treatment, obtain corresponding first data block of the first residual block.
In force, terminal in the target image, can obtain the data of some frame (can be referred to as target frame), target frame
Multiple pixels can be included, if target frame can be 1280*720, then the pixel that target frame includes can be drawn
Point, obtain multiple original pixels blocks.Terminal can obtain block of pixels (i.e. first pixel in multiple original pixels blocks
Block), then the first pixel can be obtained according to the first block of pixels and default prediction algorithm (such as infra-frame prediction and inter prediction)
Corresponding first prediction block of block, then by each pixel in the pixel value of each pixel in the first prediction block and the first prediction block
Pixel value carry out it is corresponding subtract each other, obtain corresponding first residual block of the first block of pixels, then can to the first residual block into
Row DCT (Discrete Cosine Transform, discrete cosine transform) and quantification treatment, the first data after being quantified
Block.For each original pixels block of division, terminal can be carried out above-mentioned processing, obtain the corresponding number of each original pixels block
According to block.Wherein, the size of data block can include 4*4,8*8,16*16,32*32.
After the first data block after terminal acquisition target image quantification treatment, it may be determined that the size of the first data block, such as
The size of the first data block of fruit is less than or equal to pre-set dimension, then can be counted according to default pixel traversal order to first
The pixel included according to block is traveled through, and obtains the quantized value of each pixel, and then can be determined last in the first data block
One quantized value and default value (i.e. the second default value) different pixel, then can travel through suitable according to pixel
Sequence, obtains the quantized value of the pixel before the pixel, and terminal can be compressed processing to the quantized value got.If
The size of first data block is more than pre-set dimension, then the first data block can be divided into the data sub-block of pre-set dimension.For example,
Pre-set dimension can be 4*4, if the size of the first data block is 4*4, can without division, and according to above-mentioned compression at
Reason process, is compressed the first data block；, can be by if the size of the first data block is 8*8,16*16 or 32*32
One data block is divided into the data sub-block of multiple 4*4.
Step 102, according to default sub-block traversal order, the quantized value for the pixel that each data sub-block includes is judged successively
Absolute value and value whether be the first default value, until determine the first data sub-block it is corresponding and be worth be the first default value
When, according to sub-block traversal order, determine the data sub-block before the first data sub-block.
In force, the sub-block traversal order of data block can be prestored in terminal, terminal can be according to default son
Block traversal order, obtains data sub-block in the first data block, then can determine the pixel that the data sub-block got includes
The absolute value and value of the quantized value of point.
Specifically, after terminal gets data sub-block A, the quantized value for each pixel that data sub-block A is included can be obtained,
Then can determine the absolute value of each quantized value, so can calculate these quantized values and value.Terminal is calculating these and value
When, the quantized value of first pixel can be first obtained, then obtain the amount of second pixel point according to the sequence of positions of pixel
Change value, then calculate the two pixels and value (can be described as a), the quantized value of the 3rd pixel, calculating a are then obtained again
With the quantized value of the 3rd pixel and value, and so on.Terminal can also carry out SIMD (Single in calculating and value
Instruction Multiple Data, single-instruction multiple-data stream (SIMD)) optimization, such terminal can obtain data sub-block A bags
The quantized value of all pixels point contained, then carries out read group total, so as to improve calculating and value to the quantized value got
Efficiency.
Terminal calculate the absolute value for the quantized value of pixel that data sub-block A is included and after value, will can determine
With value compared with the first default value, whether judge to obtain is the first default value with value, if obtain and value is
First predetermined threshold value, then can determine the data before the data sub-block (i.e. the first data sub-block) according to sub-block traversal order
Sub-block.If obtain and value is unequal with the first predetermined threshold value, can be obtained next according to default sub-block traversal order
A data sub-block, repeats the above, until determining that some data sub-block (i.e. the first data sub-block) is corresponding and value is first
During default value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined.Wherein, the first default value
For can be with 0.
Optionally, corresponding sub-block traversal order, corresponding place can be chosen according to the pixel number that data block includes
Reason process can be as follows：The correspondence of the pixel number that data block according to prestoring includes and sub-block traversal order,
Determine the corresponding first sub-block traversal order of pixel number that the first data block includes；According to the first sub-block traversal order, according to
Whether the absolute value of the quantized value of the secondary pixel for judging each data sub-block and including is the first default value with value.
In force, more seed block traversal orders can be prestored in terminal, the first data block of terminal-pair is divided
Afterwards, the pixel number that can be included according to the first data block, to choose corresponding sub-block traversal order.For example, for 8*8's
Data block, corresponding sub-block traversal order can be 0,2,1,3, as shown in Figure 2；For the data block of 16*16, corresponding sub-block
Traversal order can be 0,2,5,9, Isosorbide-5-Nitrae, 8,12,3,7,11,14,6,10,13,15, as shown in Figure 3；For the data of 32*32
Block, corresponding sub-block traversal order can be 0,2,5,9,14,20,27,35, Isosorbide-5-Nitrae, 8,13,19,26,34,42,3,7,12,
18,25,33,41,48,6,11,17,24,32,40,47,53,10,16,23,31,39,46,52,57,15,22,30,38,45,
51,56,60,21,29,37,44,50,55,59,62,28,36,43,49,54,58,61,63, corresponding processing sequence with it is above-mentioned
Two kinds of data blocks are similar, repeat no more.Wherein, the numerical value in above-mentioned traversal order is the mark of data sub-block.In addition, for 8*
8 data block, can also use horizontal traversal order and vertical traversal order to be traveled through, wherein, horizontal sub-block traversal order
Can be：Horizontal traversal order:0,1,2,3；Vertical traversal order can be 0,2,1,3.
Terminal determines the corresponding first sub-block traversal of pixel number that the first data block includes according to above-mentioned correspondence
After order, the quantization for the pixel that each data sub-block includes can be judged successively according to the first sub-block traversal order determined
Whether the absolute value of value is the first default value with value.
Step 103, the quantized value of the pixel included to the data sub-block before the first data sub-block is compressed processing.
In force, if terminal is according to default sub-block traversal order, the first data sub-block of inquiry is corresponding and value is
During the first default value, then the data sub-block before the first data sub-block can be determined according to sub-block traversal order.For example, the
One data block is 8*8, and sub-block traversal order is 0,2,1,3, and terminal determines to be identified as 1 data sub-block (i.e. the first data sub-block)
And value be the first default value, then can obtain be identified as 0 and 2 data sub-block, then the two data sub-blocks are included
The quantized value of pixel be compressed processing.
Optionally, terminal can also more accurately determine to need the quantized value for the pixel for being compressed processing, accordingly
Processing procedure can be as follows：In the total data sub-block before the first data sub-block, determine adjacent with the first data sub-block
The second data sub-block；According to default pixel traversal order, determined in the second data sub-block last quantized value with
Different first pixel of second default value；According to pixel traversal order, the first pixel in the second data sub-block is determined
The quantized value of pixel before point；The quantized value of the pixel included to the data sub-block before the second data sub-block, and
The quantized value of pixel in second data sub-block before the first pixel is compressed processing.
In force, can be in the first data sub-block after terminal determines the total data sub-block before the first data sub-block
In total data sub-block before, the data sub-block (i.e. second data sub-block) adjacent with the first data sub-block, Ran Houke are determined
With according to default pixel traversal order,
The pixel included to the second data sub-block travels through, and determines the quantized value of each pixel, then can incite somebody to action
The quantized value of each pixel is contrasted with the second default value, determines last quantized value and the second default value not phase
The first same pixel.Terminal can be determined in the second data sub-block before the first pixel according to pixel traversal order
The quantized value of pixel, the quantized value of the pixel included to the data sub-block before the second data sub-block, and the second data
The quantized value of pixel in sub-block before the first pixel is compressed processing.The size of data sub-block can be 4*4, logarithm
The pixel traversal order for carrying out pixel traversal according to sub-block can have following three kinds：Standard traversal order:0,4,1,8,5,2,
12,9,6,3,13,10,7,14,11,15, as shown in Figure 4；Horizontal traversal order:0,1,2,3,4,5,6,7,8,9,10,11,
12,13,14,15, as shown in Figure 5；Vertical traversal order:0,4,8,12,1,5,9,13,2,6,10,14,3,7,11,15, such as scheme
Shown in 6.Wherein, the numerical value in pixel traversal order is the mark of pixel in data sub-block.
Optionally, can be to being first ranked up to pixel, then be compressed processing, corresponding processing procedure can be as
Under：According to the former processing sequence of the pixel in compression process, included to each data sub-block, and to each data sub-block bag
The target processing sequence of the pixel contained, arranges the pixel that the data sub-block before the first data sub-block includes again
Sequence.
In force, for the data block of 16*16 and 32*32, above-mentioned standard traversal order is only supported, according to standard time
Go through during order travels through pixel, it is necessary to repeatedly redirected processing, it is longer repeatedly to redirect the used time of processing, meeting
Reduce the efficiency that is compressed to image, therefore, can by way of being rearranged to pixel so that terminal according to
When above-mentioned horizontal traversal order or vertical traversal order are handled, the suitable of the corresponding quantized value of standard traversal order can be obtained
Sequence.
For each data sub-block of division, the original place that terminal can obtain the pixel included to each data sub-block is made in order
Sequence, and then determine the processing sequence of corresponding quantized value, then can be according to the target of the pixel included to each data sub-block
Processing sequence, the pixel included to the data sub-block before the first data sub-block is resequenced, so that terminal is according to mesh
When mark processing sequence is handled, the processing sequence that original place makes the corresponding quantized value of sequence in order can must be arrived.For example, the first data block
Size be 4*4, former processing sequence is 0,4,1,8,5,2,12,9,6,3,13,10,7,14,11,15, it includes each pixel
Point quantized value as shown in fig. 7, target processing sequence be 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, then weigh
After new sort, the quantized value for each pixel that the first data block includes is as shown in figure 8, in former processing sequence and target processing sequence
Digital representation pixel point identification,.
In the embodiment of the present invention, the first data block after target image quantification treatment is obtained, and the first data block is divided
Into the data sub-block of pre-set dimension, according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Whether the absolute value of quantized value is the first default value with value, until determining that the first data sub-block is corresponding and value is pre- for first
If during numerical value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined, before the first data sub-block
The quantized value for the pixel that data sub-block includes is compressed processing, in this way, during being compressed to target image, nothing
All data sub-blocks that need to be included to data block travel through, it is possible to quantized value to be compressed are determined, so as to improve pressure
The efficiency of contract drawing picture.
Embodiment three
Based on identical technical concept, the embodiment of the present invention additionally provides a kind of device being compressed to image, such as Fig. 9
Shown, which includes：
Acquisition module 910, for obtaining the first data block after target image quantification treatment, and by first data block
It is divided into the data sub-block of pre-set dimension；
Judgment module 920, for according to default sub-block traversal order, judging the picture that each data sub-block includes successively
Whether the absolute value of the quantized value of vegetarian refreshments is the first default value with value, until determining that the first data sub-block is corresponding and value is
During first default value, according to the sub-block traversal order, the data sub-block before first data sub-block is determined；
Compression module 930, for the quantized value of the pixel included to the data sub-block before first data sub-block
It is compressed processing.
Optionally, as shown in Figure 10, the compression module 930, including：
First determination sub-module 931, in the total data sub-block before first data sub-block, determines and institute
State the second adjacent data sub-block of the first data sub-block；
Second determination sub-module 932, for according to default pixel traversal order, in second data sub-block really
Fixed last quantized value and different first pixel of the second default value；
3rd determination sub-module 933, for according to the pixel traversal order, determining institute in second data sub-block
State the quantized value of the pixel before the first pixel；
Submodule 934 is compressed, for the quantization of the pixel included to the data sub-block before second data sub-block
Value, and the quantized value of the pixel described in second data sub-block before the first pixel are compressed processing.
Optionally, as shown in figure 11, the judgment module 920, including：
4th determination sub-module 921, pixel number and sub-block for being included according to the data block prestored travel through
The correspondence of order, determines the corresponding first sub-block traversal order of pixel number that first data block includes；
Judging submodule 922, for according to the first sub-block traversal order, judging that each data sub-block corresponds to successively
And value whether be the first default value.
Optionally, as shown in figure 12, described device further includes：
Sorting module 940, for according in compression process, the original place of the pixel included to each data sub-block to be made in order
Sequence, and the target processing sequence of the pixel included to each data sub-block, to the number before first data sub-block
The pixel included according to sub-block is resequenced.
Optionally, as shown in figure 13, the acquisition module 910, including：
First acquisition submodule 911, for obtaining the first block of pixels in the target image；
5th determination sub-module 912, for the prediction algorithm by prestoring, determines that first block of pixels is corresponding
First prediction block；
6th determination sub-module 913, for determining in first block of pixels pixel value of each pixel and described the
The difference of the pixel value of each pixel, obtains the first residual block in one prediction block, first residual block is carried out discrete remaining
String converts DCT and quantification treatment, obtains corresponding first data block of first residual block.
Optionally, first default value is 0.
In the embodiment of the present invention, the first data block after target image quantification treatment is obtained, and the first data block is divided
Into the data sub-block of pre-set dimension, according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Whether the absolute value of quantized value is the first default value with value, until determining that the first data sub-block is corresponding and value is pre- for first
If during numerical value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined, before the first data sub-block
The quantized value for the pixel that data sub-block includes is compressed processing, in this way, during being compressed to target image, nothing
All data sub-blocks that need to be included to data block travel through, it is possible to quantized value to be compressed are determined, so as to improve pressure
The efficiency of contract drawing picture.
It should be noted that：Above-described embodiment provide the device being compressed to image when being compressed to image,
, can be as needed and by above-mentioned function distribution only with the division progress of above-mentioned each function module for example, in practical application
Completed by different function modules, i.e., the internal structure of equipment is divided into different function modules, it is described above to complete
All or part of function.In addition, the device being compressed to image that above-described embodiment provides and being compressed to image
Embodiment of the method belongs to same design, its specific implementation process refers to embodiment of the method, and which is not described herein again.
Example IV
Figure 14 is a kind of structure diagram of terminal according to an exemplary embodiment.The terminal can be used for implementing
The method of the transmission data provided in above-described embodiment.
Terminal 400 can include RF (Radio Frequency, radio frequency) circuit 110, include one or more meters
The memory 120 of calculation machine readable storage medium storing program for executing, input unit 130, display unit 140, sensor 150, voicefrequency circuit 160,
WiFi (wireless fidelity, Wireless Fidelity) module 170, include one or the processing of more than one processing core
The component such as device 180 and power supply 190.It will be understood by those skilled in the art that the terminal structure shown in Figure 14 is not formed pair
The restriction of terminal, can include than illustrating more or fewer components, either combine some components or different component cloth
Put.Wherein：
RF circuits 110 can be used for receive and send messages or communication process in, the reception and transmission of signal, especially, by base station
After downlink information receives, transfer to one or more than one processor 180 is handled；In addition, will be related to the data sending of uplink to
Base station.In general, RF circuits 110 include but not limited to antenna, at least one amplifier, tuner, one or more oscillators, use
Family identity module (SIM) card, transceiver, coupler, LNA (Low Noise Amplifier, low-noise amplifier), duplex
Device etc..In addition, RF circuits 110 can also be communicated by wireless communication with network and other equipment.The wireless communication can make
With any communication standard or agreement, include but not limited to GSM (Global System of Mobile communication, entirely
Ball mobile communcations system), GPRS (General Packet Radio Service, general packet radio service), CDMA (Code
Division Multiple Access, CDMA), WCDMA (Wideband Code Division Multiple
Access, wideband code division multiple access), LTE (Long Term Evolution, Long Term Evolution), Email, SMS (Short
Messaging Service, Short Message Service) etc..
Memory 120 can be used for storage software program and module, and processor 180 is stored in memory 120 by operation
Software program and module, so as to perform various functions application and data processing.Memory 120 can mainly include storage journey
Sequence area and storage data field, wherein, storing program area can storage program area, the application program (ratio needed at least one function
Such as sound-playing function, image player function) etc.；Storage data field can be stored uses created number according to terminal 400
According to (such as voice data, phone directory etc.) etc..In addition, memory 120 can include high-speed random access memory, can also wrap
Include nonvolatile memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Correspondingly, memory 120 can also include Memory Controller, to provide processor 180 and input unit 130 to memory
120 access.
Input unit 130 can be used for the numeral or character information for receiving input, and produce and user setting and function
Control related keyboard, mouse, operation lever, optics or the input of trace ball signal.Specifically, input unit 130 may include to touch
Sensitive surfaces 131 and other input equipments 132.Touch sensitive surface 131, also referred to as touch display screen or Trackpad, collect and use
Family on it or neighbouring touch operation (such as user using any suitable object or annex such as finger, stylus in touch-sensitive table
Operation on face 131 or near touch sensitive surface 131), and corresponding attachment device is driven according to formula set in advance.It is optional
, touch sensitive surface 131 may include both touch detecting apparatus and touch controller.Wherein, touch detecting apparatus detection is used
The touch orientation at family, and the signal that touch operation is brought is detected, transmit a signal to touch controller；Touch controller is from touch
Touch information is received in detection device, and is converted into contact coordinate, then gives processor 180, and processor 180 can be received
The order sent simultaneously is performed.Furthermore, it is possible to using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves
Realize touch sensitive surface 131.Except touch sensitive surface 131, input unit 130 can also include other input equipments 132.Specifically,
Other input equipments 132 can include but is not limited to physical keyboard, function key (such as volume control button, switch key etc.),
One or more in trace ball, mouse, operation lever etc..
Display unit 140 is available for the information and terminal 400 for showing by information input by user or being supplied to user
Various graphical user interface, these graphical user interface can be made of figure, text, icon, video and its any combination.
Display unit 140 may include display panel 141, optionally, can use LCD (Liquid Crystal Display, liquid crystal
Show device), the form such as OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) configure display panel
141.Further, touch sensitive surface 131 can cover display panel 141, when touch sensitive surface 131 detects on it or neighbouring touches
After touching operation, processor 180 is sent to determine the type of touch event, is followed by subsequent processing type of the device 180 according to touch event
Corresponding visual output is provided on display panel 141.Although in fig. 14, touch sensitive surface 131 and display panel 141 are conducts
Two independent components realize input and input function, but in some embodiments it is possible to by touch sensitive surface 131 and display
Panel 141 is integrated and realizes and outputs and inputs function.
Terminal 400 may also include at least one sensor 150, such as optical sensor, motion sensor and other sensings
Device.Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 141, and proximity sensor can close display when terminal 400 is moved in one's ear
Panel 141 and/or backlight.As one kind of motion sensor, gravity accelerometer can detect in all directions (generally
Three axis) acceleration size, size and the direction of gravity are can detect that when static, available for identification mobile phone posture application (ratio
Such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap)；Extremely
The other sensors such as the gyroscope that can also configure in terminal 400, barometer, hygrometer, thermometer, infrared ray sensor, herein
Repeat no more.
Voicefrequency circuit 160, loudspeaker 161, microphone 162 can provide the audio interface between user and terminal 400.Audio
The transformed electric signal of the voice data received can be transferred to loudspeaker 161, sound is converted to by loudspeaker 161 by circuit 160
Sound signal exports；On the other hand, the voice signal of collection is converted to electric signal by microphone 162, after being received by voicefrequency circuit 160
Voice data is converted to, then after voice data output processor 180 is handled, through RF circuits 110 to be sent to such as another end
End, or voice data is exported to memory 120 further to handle.Voicefrequency circuit 160 is also possible that earphone jack,
To provide the communication of peripheral hardware earphone and terminal 400.
WiFi belongs to short range wireless transmission technology, and terminal 400 can help user's transceiver electronics by WiFi module 170
Mail, browse webpage and access streaming video etc., it has provided wireless broadband internet to the user and has accessed.Although Figure 14 is shown
WiFi module 170, but it is understood that, it is simultaneously not belonging to must be configured into for terminal 400, can exist as needed completely
Do not change in the essential scope of invention and omit.
Processor 180 is the control centre of terminal 400, utilizes various interfaces and each portion of connection whole mobile phone
Point, by running or performing the software program and/or module that are stored in memory 120, and call and be stored in memory 120
Interior data, perform the various functions and processing data of terminal 400, so as to carry out integral monitoring to mobile phone.Optionally, processor
180 may include one or more processing cores；Preferably, processor 180 can integrate application processor and modem processor,
Wherein, application processor mainly handles operating system, user interface and application program etc., and modem processor mainly handles nothing
Line communicates.It is understood that above-mentioned modem processor can not also be integrated into processor 180.
Terminal 400 further includes the power supply 190 (such as battery) to all parts power supply, it is preferred that power supply can pass through electricity
Management system and processor 180 are logically contiguous, so as to realize management charging, electric discharge and power consumption by power-supply management system
The functions such as management.Power supply 190 can also include one or more direct current or AC power, recharging system, power supply event
Hinder the random components such as detection circuit, power supply changeover device or inverter, power supply status indicator.
Although being not shown, terminal 400 can also include camera, bluetooth module etc., and details are not described herein.Specifically in this reality
Apply in example, the display unit of terminal 400 is touch-screen display, and terminal 400 has further included memory, and one or one
More than program, one of them either more than one program storage in memory and be configured to by one or one with
Upper processor execution states one or more than one program includes the instruction for being used for being operated below：
The first data block after target image quantification treatment is obtained, and first data block is divided into pre-set dimension
Data sub-block；
According to default sub-block traversal order, judge successively the pixel that each data sub-block includes quantized value it is exhausted
Whether it is the first default value to value and value, until determining that the first data sub-block is corresponding and value is first default value
When, according to the sub-block traversal order, determine the data sub-block before first data sub-block；
The quantized value of the pixel included to the data sub-block before first data sub-block is compressed processing.
Optionally, the quantized value for the pixel that the data sub-block to before first data sub-block includes is pressed
Contracting is handled, including：
In the total data sub-block before first data sub-block, adjacent with first data sub-block the is determined
Two data sub-blocks；
According to default pixel traversal order, last quantized value and second is determined in second data sub-block
Different first pixel of default value；
According to the pixel traversal order, the pixel before the first pixel described in second data sub-block is determined
The quantized value of point；
The quantized value of the pixel included to the data sub-block before second data sub-block, and second data
The quantized value of pixel described in sub-block before the first pixel is compressed processing.
Optionally, it is described according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Quantized value absolute value and value whether be the first default value, including：
The correspondence of the pixel number that data block according to prestoring includes and sub-block traversal order, determines described
The corresponding first sub-block traversal order of pixel number that first data block includes；
According to the first sub-block traversal order, the quantized value for the pixel that each data sub-block includes is judged successively
Whether absolute value is the first default value with value.
Optionally, the method further includes：
According to the former processing sequence of the pixel in compression process, included to each data sub-block, and to described each
The target processing sequence for the pixel that data sub-block includes, the pixel included to the data sub-block before first data sub-block
Point is resequenced.
Optionally, first data block obtained after target image quantification treatment, including：
The first block of pixels is obtained in the target image；
By the prediction algorithm prestored, corresponding first prediction block of first block of pixels is determined；
Determine the pixel value of each pixel and each pixel in first prediction block in first block of pixels
The difference of pixel value, obtains the first residual block, carries out discrete cosine transform and quantification treatment to first residual block, obtains
To corresponding first data block of first residual block.
Optionally, first default value is 0.
In the embodiment of the present invention, the first data block after target image quantification treatment is obtained, and the first data block is divided
Into the data sub-block of pre-set dimension, according to default sub-block traversal order, the pixel that each data sub-block includes is judged successively
Whether the absolute value of quantized value is the first default value with value, until determining that the first data sub-block is corresponding and value is pre- for first
If during numerical value, according to sub-block traversal order, the data sub-block before the first data sub-block is determined, before the first data sub-block
The quantized value for the pixel that data sub-block includes is compressed processing, in this way, during being compressed to target image, nothing
All data sub-blocks that need to be included to data block travel through, it is possible to quantized value to be compressed are determined, so as to improve pressure
The efficiency of contract drawing picture.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. method being compressed to image, it is characterised in that the described method includes：The first data block after target image quantification treatment is obtained, and first data block is divided into the data of pre-set dimension Sub-block；According to default sub-block traversal order, the absolute value of the quantized value for the pixel that each data sub-block includes is judged successively And value whether be the first default value, until determine the first data sub-block it is corresponding and be worth be first default value when, According to the sub-block traversal order, the data sub-block before first data sub-block is determined；The quantized value of the pixel included to the data sub-block before first data sub-block is compressed processing,The quantized value for the pixel that the data sub-block to before first data sub-block includes is compressed processing, bag Include：In the total data sub-block before first data sub-block, second number adjacent with first data sub-block is determined According to sub-block；According to default pixel traversal order, determine that last quantized value and second is preset in second data sub-block Different first pixel of numerical value；According to the pixel traversal order, pixel described in second data sub-block before the first pixel is determined Quantized value；The quantized value of the pixel included to the data sub-block before second data sub-block, and second data sub-block Described in the quantized value of pixel before the first pixel be compressed processing.
- 2. according to the method described in claim 1, it is characterized in that, described according to default sub-block traversal order, judge successively Whether the absolute value of the quantized value for the pixel that each data sub-block includes is the first default value with value, including：The correspondence of the pixel number that data block according to prestoring includes and sub-block traversal order, determines described first The corresponding first sub-block traversal order of pixel number that data block includes；According to the first sub-block traversal order, judge successively the pixel that each data sub-block includes quantized value it is absolute Whether value is the first default value with value.
- 3. according to the method described in claim 1, it is characterized in that, the method further includes：According to the former processing sequence of the pixel in compression process, included to each data sub-block, and to each data The target processing sequence for the pixel that sub-block includes, the pixel included to the data sub-block before first data sub-block click through Row rearrangement.
- 4. according to the method described in claim 1, it is characterized in that, first data obtained after target image quantification treatment Block, including：The first block of pixels is obtained in the target image；By the prediction algorithm prestored, corresponding first prediction block of first block of pixels is determined；Determine the pixel of the pixel value of each pixel and each pixel in first prediction block in first block of pixels The difference of value, obtains the first residual block, carries out discrete cosine transform and quantification treatment to first residual block, obtains institute State corresponding first data block of the first residual block.
- 5. according to the method described in claim 1, it is characterized in that, first default value is 0.
- 6. a kind of device being compressed to image, it is characterised in that described device includes：Acquisition module, for obtaining the first data block after target image quantification treatment, and first data block is divided into The data sub-block of pre-set dimension；Judgment module, for according to default sub-block traversal order, judging the pixel that each data sub-block includes successively The absolute value of quantized value and value whether be the first default value, until determining that the first data sub-block is corresponding and value is described the During one default value, according to the sub-block traversal order, the data sub-block before first data sub-block is determined；Compression module, the quantized value of the pixel for being included to the data sub-block before first data sub-block are compressed Processing,The compression module, including：First determination sub-module, in the total data sub-block before first data sub-block, determining and described first The second adjacent data sub-block of data sub-block；Second determination sub-module, for according to default pixel traversal order, being determined in second data sub-block last One quantized value and different first pixel of the second default value；3rd determination sub-module, for according to the pixel traversal order, determining first described in second data sub-block The quantized value of pixel before pixel；Submodule is compressed, for the quantized value of the pixel included to the data sub-block before second data sub-block, and The quantized value of pixel described in second data sub-block before the first pixel is compressed processing.
- 7. device according to claim 6, it is characterised in that the judgment module, including：4th determination sub-module, for pair of the pixel number and sub-block traversal order that are included according to the data block prestored It should be related to, determine the corresponding first sub-block traversal order of pixel number that first data block includes；Judging submodule, for according to the first sub-block traversal order, judging that each data sub-block is corresponding and value successively Whether it is the first default value.
- 8. device according to claim 6, it is characterised in that described device further includes：Sorting module, for the former processing sequence according to the pixel in compression process, included to each data sub-block, and The target processing sequence of the pixel included to each data sub-block, to the data sub-block bag before first data sub-block The pixel contained is resequenced.
- 9. device according to claim 6, it is characterised in that the acquisition module, including：First acquisition submodule, for obtaining the first block of pixels in the target image；5th determination sub-module, for the prediction algorithm by prestoring, determines that first block of pixels is corresponding first pre- Survey block；6th determination sub-module, for determining the pixel value of each pixel and first prediction block in first block of pixels In each pixel pixel value difference, obtain the first residual block, discrete cosine transform carried out to first residual block And quantification treatment, obtain corresponding first data block of first residual block.
- 10. device according to claim 7, it is characterised in that first default value is 0.
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