CN102855643A - Method for compressing and decompressing font library files and monochrome images - Google Patents
Method for compressing and decompressing font library files and monochrome images Download PDFInfo
- Publication number
- CN102855643A CN102855643A CN2012102715387A CN201210271538A CN102855643A CN 102855643 A CN102855643 A CN 102855643A CN 2012102715387 A CN2012102715387 A CN 2012102715387A CN 201210271538 A CN201210271538 A CN 201210271538A CN 102855643 A CN102855643 A CN 102855643A
- Authority
- CN
- China
- Prior art keywords
- picture
- pixel
- label
- compression
- label look
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a method for compressing and decompressing font library files and monochrome images. The compression method comprises the steps of: 1) setting a group of tagged colors which have different color values, wherein different results are obtained after different tagged colors are added; 2) creating a blank region, extracting a picture which includes transparent pixels and opaque pixels according to the sequence of pictures, taking the color value of a tagged color according to the sequence of the tagged colors to assign the value to the opaque pixel of the picture, and copying the value-assigned opaque pixel to the region to produce a tagged color picture; 3) repeating the step 2) till all the tagged colors are used; and 4) repeating the steps 2) and 3) till all the pictures are drawn. As a plurality of tagged color pictures are compressed in a same region, the storage space occupied by the region is 1/the tagged color number of the original character images, and the compression rate is greatly larger than that of the existing compression method.
Description
Technical field
The present invention relates to a kind of Image Compression, be specifically related to a kind of compression for font file and monochrome image and decompression method.
Background technology
The preserving type of existing font file comprises vector font library and dot matrix word library, and wherein vector font library is that the stroke decomposition of each literal is become once or the secondary Bezier, then writes down the parameter of these curves.When showing the vector literal, at first from vector font library its Word message is extracted, the profile of drawing out these curves according to the concrete size of literal forms the vector literal.To geometric transformations such as the vector literal are rotated, amplify, dwindle the time, only need carry out conversion to the geometric parameter of vector literal and just can realize.Existing vector font library has a variety of, and difference is that different mathematics that they adopt is described and forms the vector literal.The advantage of vector literal is and can arbitrarily font be zoomed in or out by calculation of parameter, and it is clear round and smooth that the stroke profile still can keep.
The essence of dot matrix word library is the bitmap picture, is comprised of the pixel with the ARGB channel data that is arranged in matrix, and each pixel is an ARGB(alpha, red, green, blue) look, be divided into the alpha passage, the red passage, the green passage, the blue passage, wherein the alpha passage is transparent channel.The span of pixel can be divided into alpha channel data, red channel data, green channel data, blue channel data from 0x00000000 to 0xFFFFFFFF.
In the now web game exploitation, only need a kind of font of literal fixedly font size size within the specific limits, if use existing character library, the character library that is packed into account can increase user's download, and the character library the inside much is redundant literal in addition.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, proposed a kind ofly to be superimposed upon the same area by the multi-layer image file that will give the label look and to compress, thus but the compression and the decompression method that are used for character library and monochrome image of Effective Raise image file compressibility.
Technical scheme of the present invention is as follows:
A kind of compression of picture and decompression method, wherein compression step comprises:
1) one group of label look is set, the color value of described label look different, and the result is different after the stack of different label look;
2) zone of a blank of establishment, extract a picture by the order of picture, the pixel of described picture comprises transparent pixels and nontransparent pixel, the color value of getting a label look by the order of described label look is assigned to the nontransparent pixel of described picture, nontransparent pixel after the assignment is copied on the described zone generating labels chromatic graph sheet;
3) repeat above-mentioned steps 2), until described label look all uses;
4) repeating said steps 2) and step 3), until all pictures are all completed;
Decompression step comprises:
I) according to zone and the number of plies at label chromatic graph sheet place corresponding to the described picture of the positioned in sequence of described picture, determine the label look of described label chromatic graph sheet by the described number of plies;
II) all pixels in the described zone are scanned, find out the pixel of the described label look that superposeed, described pixel is filled the color value of described nontransparent pixel;
III) remaining pixel is transparent pixels, is made as described transparent pixels transparent or the another one color value.
The method step that the label look described is set in the step 1) comprises:
A) optional n number { u in ordered series of numbers { 1,2,4,8,16 }
1, u
2, u
n, wherein n is for 1/2nd of the figure place that represents color value in each channel data;
B) choose m channel data; The color value of each channel data is divided into low level and a high position, and wherein the color value of low level is got { u
1, u
2, u
n, high-order color value is got { u
10, u
20 ..., u
n0 }, and the color value that comprises in m the channel data getting of card different;
C) color that described color value is corresponding is as described label look, the quantity=2n of described label look * m.
In the described step a), when n=4, { u
1, u
2, u
3, u
4}={ 1,2,4,8 }.
Described 0＜m≤4.
Described step 2) in, described zone is the part of the bitmap of a blank; In the described step 4), the zone that many groups have been compressed described label chromatic graph sheet is matrix and is arranged in the described bitmap; Described step I) in, according to the order of described picture, zone and the number of plies at positioning label chromatic graph sheet place in described bitmap.
Described step I) in, the number of the described label look of serial number mod of the described number of plies=described picture.
Described picture comprises character image and monochrome image.
When described picture is character image, described step 2) from character library, extracts as required picture in.
Described Step II) in, the scan method of the pixel of the label look that superposeed comprises:
I) the superposition value set of 2n label look in the single channel data at the described label look of calculating place
In the set of described superposition value, find out described label look corresponding to relevant all described numbers of plies that superposeed all 2
(2n-1)Individual superposition value;
Ii) scan the pixel value of all pixels in the described zone, when described pixel value falls into described 2
(2n-1)In the individual superposition value, the pixel that then described pixel value is corresponding is nontransparent pixel.
Technique effect of the present invention is as follows:
A kind of compression and decompression method for font file and monochrome image, wherein compression step comprises: 1) one group of label look is set, and the color value of described label look different, and the result is different after the stack of different label look; 2) zone of a blank of establishment, extract a picture by the order of picture, the pixel of described picture comprises transparent pixels and nontransparent pixel, the color value of getting a label look by the order of described label look is assigned to the nontransparent pixel of described picture, nontransparent pixel after the assignment is copied on the described zone generating labels chromatic graph sheet; 3) repeat above-mentioned steps 2), until described label look all uses; 4) repeating said steps 2) and step 3), until all pictures are all completed.Owing to having compressed a plurality of label chromatic graph sheets in the same area, therefore the shared storage space in zone is 1/ label chromatic number order of inherited literal image, and compressibility is much larger than existing compression method.
The color value of label look of the present invention is different, and the rear result of different label look stack is different, and therefore shown superimposed image can guarantee to parse smoothly the front label chromatic graph sheet of all stacks in the zone.When the choosing of label look, the present invention has utilized ordered series of numbers { 1,2,4,8,16,32,64,128,256 ... combined result unique character all with unduplicated arbitrary element, according to the color value of the label look in the channel data of above-mentioned character structure, the superposition value by any label look can decomposite the label look before the stack.With this scanning of in the zone, passing through to pursue pixel, parse exactly the label chromatic graph sheet that comprises the specify labels look.
Method of the present invention not only can be used for compression, the decompression of character library, can also be used for compression, the decompression of image of the content of the useful monochromatic expression of institute.
Description of drawings
Fig. 1 is the dot structure schematic diagram with the ARGB passage
Fig. 2 is the ARGB channel data structural representation of each pixel
Fig. 3 is superposeed when the compressing design sketch in zone of 32 layers of character image of the present invention
Embodiment
The present invention will be described below in conjunction with accompanying drawing.
In the following description, describing some details wholely understands of the present invention for the technician of computer realm provides.In an embodiment, show the element of realizing concrete function with the form of schematic diagram or block diagram, so that outstanding technology emphasis, and can aspect unnecessary details, not blur the present invention.Such as, owing to having contained about details disclosed in this areas such as network service, electromagnetic signal instruction technique, user interface or I/O technology, common-sense in those of ordinary skills' the understanding scope, thereby omitted to the full extent in an embodiment above-mentioned ins and outs, and do not think that these details are to obtain the necessary feature of complete skill scheme of the present invention.
Alleged monochromatic picture is for except the unified background color that is made of transparent pixels among the present invention, and the pixel of its content that is used for Showing Picture is character image or the monochrome image of the character library of same color.In a sense, character image also belongs to monochrome image, but in order on content, to be distinguished, the monochromatic picture that the present invention will have word content is defined as character image, the monochromatic picture that will have picture material is defined as monochrome image such as blueprint, design drawing, monochromatic artistic illustration (such as the eaves tile rubbing) etc. by the monochromatic picture that a kind of lines or pattern of color forms.Character image is identical with the compression and decompression principle of monochrome image.
In the web game field, because the font size of literal all is relatively-stationary, is exactly 12-16 number such as the most frequently used font, particularly take content in the main page, font size generally all only has 1～2 font size difference, and major part all is large-area single font size.Therefore as long as the maximum number font is preserved with bitmap form, copy out more when in use getting final product, little font then can be by dwindling to realize with large word.The storage medium of literal just converts the bitmap picture to by vector font library and dot matrix word library and has realized like this, and when converting the bitmap picture to, has also done the operation that literal is chosen, and only a literal of using in game is compressed on the bitmap.The system of a common web game comprises game server 1 and client 2, and the compression process of text file is carried out in game server 1, generates compressed file after the compression, and compressed file is imported in the client 2 by network; The process that decompresses is carried out in client 2, obtains decompressing files after compressed file is decompressed; Client 2 uses decompressing files to generate interface, and the user is shown.
The principle of the compression method of character library is: each character image in the character library is generated on the literal label chromatic graph sheet with the label look, when the different label chromatic graph sheets of different colours overlapped at the same area, in the superimposed image that this zone generates, still can tell easily by naked eyes the font of different literals, all label chromatic graph sheets before the image that requirement has finally been drawn will guarantee to parse smoothly and superpose.The multilayer labels chromatic graph sheet owing in the same area, having superposeed, every layer label look does not repeat, and therefore the shared storage space in zone is 1/ label chromatic number order of inherited literal image.When decompressing, can pass through Pixel calcualting, successively character image be extracted, guarantee the accurate of Pixel-level.The present invention is called the zone with " zone " that the different literals of above-mentioned different colours is superimposed, and a plurality of zones are matrix arranges, and forms a bitmap picture and stores.
As shown in Figure 2, each district inclusion is n * n the pixel that matrix is arranged, as the zone of No. 12 words that superpose just comprises 12 * 12 pixels.For a pixel with alpha channel data, red channel data, green channel data, blue channel data, each channel data comprises 8 16 system numbers, every can corresponding a kind of label look, and each pixel can be put at most 32 kinds of different label looks so.In the ordered series of numbers theory, proved ordered series of numbers { 1,2,4,8,16,32,64,128,256 ... in unduplicated combination in any result unique character all, therefore chooser ordered series of numbers { 1,2,4,8 } in above-mentioned ordered series of numbers can instead be released the number of two in the above-mentioned ordered series of numbers according to any one two number sum.This special nature is applied to the present invention, goes out the label look that whether comprises appointment according to the calculated for pixel values in zone, and the pixel extraction that will comprise the specify labels look out.In the present embodiment, each passage occupies two 16 system numbers, and low level gets 1,2,4,8, and a high position then gets 10,20,40,80, and the color value of label look in each passage is defined as follows:
The alpha channel data represents the color value of the gray scale label look of different depth
A1(0x01000000)、A2(0x02000000)、A3(0x04000000)、A4(0x08000000)
A5(0x10000000)、A6(0x20000000)、A7(0x40000000)、A8(0x80000000)
The red channel data represents the color value of the red-ticket look of different depth
R1(0x00010000)、R2(0x00020000)、R3(0x00040000)、R4(0x00080000)
R5(0x00100000)、R6(0x00200000)、R7(0x00400000)、R8(0x00800000)
The green channel data represents the color value of the green-ticket look of different depth
G1(0x00000100)、G2(0x00000200)、G3(0x00000400)、G4(0x00000800)
G5(0x00001000)、G6(0x00002000)、G7(0x00004000)、G8(0x00008000)
The blue channel data represents the color value of the blue label look of different depth
B1(0x00000001)、B2(0x00000002)、B3(0x00000004)、B4(0x00000008)
B5(0x00000010)、B6(0x00000020)、B7(0x00000040)、B8(0x00000080)
Wherein each channel data comprises 8 color values, and 4 passages have 32 color values, namely always have 32 kinds of label looks.Take the zone (No. 12 fonts) that comprises 12 * 12 pixels as example, according to above-mentioned definition, character library compression method of the present invention is as follows:
1) zone of a blank of establishment, a literal will be taken out in the character library in order, order A1 according to above-mentioned label look ... A8, R1 ... R8, B1 ... B8, G1 ... G8 takes out a label look to the nontransparent pixel assignment of this literal, nontransparent pixel after the assignment is copied on the above-mentioned zone generating labels chromatic graph sheet; For example, the nontransparent pixel of the 1st character image is given the color value of A1, the like, the nontransparent pixel of the 32nd character image is given the color value of G8;
2) with one group 32 label chromatic graph sheets according to A1 ... A8, R1 ... R8, B1 ... B8, G1 ... the sequencing of G8 is superimposed upon on the same area, the 32 kinds of colors that can superpose at most in some pixels in this zone so, and may be without any color in other pixels;
3) after one group of character image with 32 kinds of colors all converted label chromatic graph sheet to, the position in the mobile zone of bitmap began next group according to the order in the character library ..., until all character images in the traversal character library; It will be noted that the label look of in compression process character image being given not is the color of literal itself, but a kind of for making things convenient for pixel to calculate the label that defines;
4) as shown in Figure 3, the zone of some is matrix according to sequencing arranges, forms a bitmap picture and store, thereby obtain the big or small compressed file of inherited literal file 1/32 that only is.
The principle of text file decompression method is: for the pixel of alpha channel data, red channel data, green channel data, blue channel data, each channel data comprises 8 16 system numbers.Principle according to permutation and combination, 8 label looks in each passage can be combined into 255 kinds of different results, and this anabolic process has a rule, namely must contain 8 label look (A1 in the same passage in 255 kinds of combinations ... A8 or R1 ... R8 or B1 ... B8 or G1 ... the combination of a specify labels look G8) is fixed as 128 kinds.Owing to can determine regional M and the label look C at literal D place by the serial number N of literal D in character library, so as long as the pixel value of all pixels among the regional M of traversal, pixel value and the color value that comprises 128 kinds of colors of label look C are compared, all pixel N that drop in 128 kinds of colors are found out as nontransparent pixel, nontransparent pixel filling is become the desired color of literal D, and the transparent pixels except pixel N among the regional M is filled to transparent, the character image of generating character D.
Text file decompression method of the present invention is as follows:
I) reduction literal D in client 2; Determine the regional M at place according to the serial number N of literal D in text file,
Because every layer label look is according to A1 in the zone ... A8, R1 ... R8, B1 ... B8, G1 ... G8's is arranged sequentially, so the number of plies=Nmod32 of the label look C of literal D, both can find label look C;
II) find regional M and label look C after, extract all possible superposition value C' of label look C, wherein comprised the color value of the label look C that might superpose among all possible superposition value C'; Traveling through all pixels of regional M, is nontransparent pixel with the corresponding pixel of pixel value that drops among the superposition value C', gives the desired color value of literal D itself with nontransparent pixel;
III) and with the pixel value of transparent pixels remaining among the regional M be made as 0x00000000, namely transparent, so just restore the character image of literal D.
Since in the present embodiment with 1,2,4, the 8 colouring discrimination key elements as each passage, but can also get any 4 numbers in 1,2,4,8,16,32,64,128,256 as the colouring discrimination key element, because the difference of numeral is larger, the difference of its color is also larger, but the number above 16 will take two, will reduce so available label chromatic number amount.In addition, the high position of the alpha channel data of each pixel, red channel data, green channel data and blue channel data is got 4 numbers in the present embodiment, low level is got 4 numbers, totally 8 16 system numbers, and the character image behind the decompress(ion) must be with the form storage of PNG; In order to improve the accuracy of separation, can also use red channel data, green channel data and a blue channel data high position to get 4 numbers, low level is got 4 numbers, totally 6 16 system numbers, just to become 24 compressibilitys be 1/24 to each regional number of plies like this, the form storage that the character image behind the decompress(ion) can JPG; Perhaps get two passages or a passage in 4 passages, but compressibility is also with regard to corresponding decline.
The principle of the compression and decompression of monochrome image is identical with the literal image: first each monochrome image is generated the label chromatic graph sheet with the label look when compression, afterwards with these label chromatic graph sheets according to label look A1 ... A8, R1 ... R8, B1 ... B8, G1 ... the order of G8 is superimposed upon in the same area, a plurality of zones are matrix arranges, and forms a bitmap picture and stores.When decompressing, find out zone and the number of plies at corresponding label chromatic graph sheet place by the serial number of monochrome image, by the label look of the corresponding outgoing label chromatic graph of number of plies sheet; Extract the color value set of label look, in all pixels of image block, find out the pixel value that drops in the color value set, and give monochrome image itself desired color value the corresponding pixel of this pixel value; Pixel value with pixel remaining in the image block is made as 0x00000000 at last, and namely transparent, perhaps other colors so just restore monochrome image.
Should be pointed out that the above embodiment can make the invention of those skilled in the art's comprehend, but do not limit the present invention in any way creation.Therefore; although this instructions has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (10)
1. the compression of a picture and decompression method, wherein compression step comprises:
1) one group of label look is set, the color value of described label look different, and the result is different after the stack of different label look;
2) zone of a blank of establishment, extract a picture by the order of picture, the pixel of described picture comprises transparent pixels and nontransparent pixel, the color value of getting a label look by the order of described label look is assigned to the nontransparent pixel of described picture, nontransparent pixel after the assignment is copied on the described zone generating labels chromatic graph sheet;
3) repeat above-mentioned steps 2), until described label look all uses;
4) repeating said steps 2) and step 3), until all pictures are all completed;
Decompression step comprises:
I) according to zone and the number of plies at label chromatic graph sheet place corresponding to the described picture of the positioned in sequence of described picture, determine the label look of described label chromatic graph sheet by the described number of plies;
II) all pixels in the described zone are scanned, find out the pixel of the described label look that superposeed, described pixel is filled the color value of described nontransparent pixel;
III) remaining pixel is transparent pixels, is made as described transparent pixels transparent or the another one color value.
2. the compression of a kind of picture as claimed in claim 1 and decompression method, it is characterized in that: the method step that the label look described is set in the step 1) comprises:
A) optional n number { u in ordered series of numbers { 1,2,4,8,16 }
1, u
2, u
n, wherein n is for 1/2nd of the figure place that represents color value in each channel data;
B) choose m channel data; The color value of each channel data is divided into low level and a high position, and wherein the color value of low level is got { u
1, u
2, u
n, high-order color value is got { u
10, u
20 ..., u
n0 }, and the color value that comprises in m the channel data getting of card different;
C) color that described color value is corresponding is as described label look, the quantity=2n of described label look * m.
3. the compression of a kind of monochromatic picture as claimed in claim 2 and decompression method is characterized in that: in the described step a), and when n=4, { u
1, u
2, u
3, u
4}={ 1,2,4,8 }.
4. as claimed in claim 2 or claim 3 a kind of compression of monochromatic picture and decompression method is characterized in that: described 0＜m≤4.
5. the compression of a kind of picture as claimed in claim 1 and decompression method, it is characterized in that: described step 2), described zone is the part of the bitmap of a blank; In the described step 4), the zone that many groups have been compressed described label chromatic graph sheet is matrix and is arranged in the described bitmap; Described step I) in, according to the order of described picture, zone and the number of plies at positioning label chromatic graph sheet place in described bitmap.
6. such as compression and the decompression method of right 1 or 2 or 3 or 5 described a kind of monochromatic pictures, it is characterized in that: described step I),
7. such as compression and the decompression method of claim 1 or 2 or 3 or 5 described a kind of monochromatic pictures, it is characterized in that: described step I), the number of the described label look of serial number mod of the described number of plies=described picture.
8. such as compression and the decompression method of claim 1 or 2 or 3 or 5 described a kind of pictures, it is characterized in that: described picture comprises character image and monochrome image.
9. the compression of a kind of picture as claimed in claim 8 and decompression method is characterized in that: when described picture is character image, described step 2) in from character library, extract as required picture.
10. such as compression and the decompression method of claim 1 or 2 or 3 or 5 described a kind of monochromatic pictures, it is characterized in that: described Step II), the scan method of the pixel of the label look that superposeed comprises:
I) the superposition value set of 2n label look in the single channel data at the described label look of calculating place
In the set of described superposition value, find out described label look corresponding to relevant all described numbers of plies that superposeed all 2
(2n-1)Individual superposition value;
Ii) scan the pixel value of all pixels in the described zone, when described pixel value falls into described 2
(2n-1)In the individual superposition value, the pixel that then described pixel value is corresponding is nontransparent pixel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102715387A CN102855643A (en) | 2012-07-31 | 2012-07-31 | Method for compressing and decompressing font library files and monochrome images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102715387A CN102855643A (en) | 2012-07-31 | 2012-07-31 | Method for compressing and decompressing font library files and monochrome images |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102855643A true CN102855643A (en) | 2013-01-02 |
Family
ID=47402204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102715387A Pending CN102855643A (en) | 2012-07-31 | 2012-07-31 | Method for compressing and decompressing font library files and monochrome images |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102855643A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109558253A (en) * | 2018-10-26 | 2019-04-02 | 深圳点猫科技有限公司 | A kind of method that text is replicated based on game webpage and electronic equipment |
| CN109949382A (en) * | 2018-12-27 | 2019-06-28 | 杭州环形智能科技有限公司 | A method of realizing that picture is high density compressed, decompresses based on machine learning |
| CN110489386A (en) * | 2019-08-06 | 2019-11-22 | Oppo广东移动通信有限公司 | Information processing method, device, storage medium and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6014464A (en) * | 1997-10-21 | 2000-01-11 | Kurzweil Educational Systems, Inc. | Compression/ decompression algorithm for image documents having text graphical and color content |
| CN1787599A (en) * | 2004-12-10 | 2006-06-14 | 株式会社理光 | Compressing a mutlivalue image with control of memory space requirement |
| CN102523444A (en) * | 2011-11-22 | 2012-06-27 | 惠州市德赛西威汽车电子有限公司 | Compression method for monochrome bitmap and system thereof |
-
2012
- 2012-07-31 CN CN2012102715387A patent/CN102855643A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6014464A (en) * | 1997-10-21 | 2000-01-11 | Kurzweil Educational Systems, Inc. | Compression/ decompression algorithm for image documents having text graphical and color content |
| CN1787599A (en) * | 2004-12-10 | 2006-06-14 | 株式会社理光 | Compressing a mutlivalue image with control of memory space requirement |
| CN102523444A (en) * | 2011-11-22 | 2012-06-27 | 惠州市德赛西威汽车电子有限公司 | Compression method for monochrome bitmap and system thereof |
Non-Patent Citations (1)
| Title |
|---|
| 论坛网友AONE: "自制中文字库嵌入——单色图形面积压缩/加密法", 《HTTP://BBS.9RIA.COM/FORUM.PHP?MOD=VIEWTHREAD&TID=34410》, 20 August 2009 (2009-08-20), pages 1 - 10 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109558253A (en) * | 2018-10-26 | 2019-04-02 | 深圳点猫科技有限公司 | A kind of method that text is replicated based on game webpage and electronic equipment |
| CN109949382A (en) * | 2018-12-27 | 2019-06-28 | 杭州环形智能科技有限公司 | A method of realizing that picture is high density compressed, decompresses based on machine learning |
| CN109949382B (en) * | 2018-12-27 | 2023-01-06 | 杭州环形智能科技有限公司 | Method for realizing high-density compression and decompression of pictures based on machine learning |
| CN110489386A (en) * | 2019-08-06 | 2019-11-22 | Oppo广东移动通信有限公司 | Information processing method, device, storage medium and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102821279A (en) | Picture compression method keeping with alpha channel | |
| Lin et al. | A lossless data hiding scheme based on three-pixel block differences | |
| CN102222314B (en) | To identify and pattern of extracting accelerates the long-range transmission of bitmap from source bitmap with parallel processing | |
| TWI230516B (en) | Segmented layered image system | |
| JP2010505162A (en) | Lattice type processing method and apparatus for transparent pages | |
| KR20200038171A (en) | Methods of variable rate compression and decompression of image data in image pipeline of graphics processing system | |
| GB2539488A (en) | Encoder, decoder and method employing palette utilization and compression | |
| CN102244784A (en) | Method for compressing and displaying picture including transparent information | |
| CN102855643A (en) | Method for compressing and decompressing font library files and monochrome images | |
| Li et al. | Sharing more information in gray visual cryptography scheme | |
| CN1924794B (en) | Digital document processing system, data processing system and peripheral equipment | |
| CN112714357A (en) | Video playing method, video playing device, electronic equipment and storage medium | |
| Qiu et al. | Rich-information reversible watermarking scheme of vector maps | |
| US9081529B1 (en) | Generation of electronic books | |
| CN112118449B (en) | Method and device for compressing and decompressing image | |
| US20040120593A1 (en) | System and method for flattening spans | |
| JP2011176770A (en) | Information processing apparatus, control method thereof, program, and storage medium | |
| TWI281827B (en) | Method of image display with real time compression | |
| CN112887722B (en) | Lossless image compression method | |
| CN114125456A (en) | Data processing method and system and electronic equipment | |
| JP5532473B2 (en) | Address color system, encoding method and decoding method using color photographic image, and encryption method | |
| US10809869B2 (en) | Layered image compression | |
| US20140362097A1 (en) | Systems and methods for hardware-accelerated key color extraction | |
| JP2000238338A (en) | Image processing device | |
| KR102154580B1 (en) | Image processing apparatus and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130102 |