CN107705340A - A kind of method and device of image decoding - Google Patents
A kind of method and device of image decoding Download PDFInfo
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- CN107705340A CN107705340A CN201711022316.0A CN201711022316A CN107705340A CN 107705340 A CN107705340 A CN 107705340A CN 201711022316 A CN201711022316 A CN 201711022316A CN 107705340 A CN107705340 A CN 107705340A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
Abstract
The invention discloses a kind of method and device of image decoding, gif file data are read by processor, according to default GIF graphics standards rule parsing gif file data, obtain using the view data after LZW encryption algorithms coding, and view data is sent to hardware logic electric circuit；Hardware logic electric circuit extracts LZW code words from the view data received, and final color data are resolved to according to LZW code words, and final color data are sent to processor, to generate decoded image.The method and device of image decoding provided by the present invention, by the parallel characteristics and pipeline organization with hardware circuit, the execution efficiency of GIF decoders and the handling capacity of GIF decoders can be lifted.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of method and device of image decoding.
Background technology
GIF is BIIF (Graphics Interchange Format) abbreviation, is by the U.S.
CompuServe companies were in the image file format proposed in 1987.Gif file form employs a kind of improved LZW
Algorithm, it is a kind of lossless compression algorithm, compression efficiency is higher, and usually 50% or so.GIF is supported in a width gif file
Several coloured images are deposited, and can be sequential read out multiple image and with time interval including shielding in a certain order
On curtain, a kind of simply animation effect is formed.
GIF is widely used in internet arena as a kind of conventional animated format.In order to which GIF images are presented on
, it is necessary to which gif file is decoded as into the form that screen can identify, such as rgb format using GIF decoders on screen.
GIF decoders are generally realized in a manner of software in the prior art, run on general processor.Reference picture 1 is existing
Shown in the schematic diagram of GIF decoding techniques, GIF decoder instructions and GIF view data are stored in DDR internal memories.Processor is certainly
Take out each GIF decoder instruction and corresponding GIF view data in DDR internal memories successively, and according to fetching order successively
Each instruction is performed, completes the decoding of GIF view data.All instructions of GIF decoders are pressed it can be seen from said process
The order occurred according to instruction serially performs successively.For general processor, the execution instructed every time includes fetching, decoding, execution
With the operation such as write back.This results in less efficient, the GIF solution bit rate for performing GIF decoder instructions on aageneral-purposeaprocessor
Relatively low, GIF decoder throughputs are relatively low.
The content of the invention
It is an object of the invention to provide a kind of method and device of image decoding, to solve existing GIF decoding techniques efficiency
Relatively low, the problem of handling capacity is relatively low.
In order to solve the above technical problems, the present invention provides a kind of method of image decoding, including：
Processor reads gif file data, according to gif file data described in default GIF graphics standards rule parsing, obtains
View data after being encoded using LZW encryption algorithms, and described image data are sent to hardware logic electric circuit；
The hardware logic electric circuit goes out LZW code words from the described image extracting data received, according to the LZW code words
Final color data are resolved to, and the final color data are sent to the processor, to generate decoded image.
Alternatively, gif file data described in the default GIF graphics standard rule parsings of the basis, obtain encoding using LZW
View data after algorithm coding includes：
The gif file data are divided into according to default GIF graphics standards rule：File header, data flow and file termination
Accord with part；
Judge whether respective file is legal gif file according to the file header, when judgement respective file is legal
During gif file, parsed according to control identifier in the data flow per a kind of data block, until detecting the file terminal symbol
Untill, obtain using the view data after LZW encryption algorithms coding.
Alternatively, judge according to the file header whether respective file is also to include after legal gif file described：
When it is illegal gif file to judge respective file, output error prompt message, and terminate the decoding behaviour of GIF images
Make.
Alternatively, it is described to go out LZW code words from the described image extracting data received, parsed according to the LZW code words
Include for final color data：
Extract the LZW code words of each image successively from described image data；
The obtained code word is resolved to actual color index value；
According to the corresponding relation of the color index value pre-set and final color data, the color index value pair is determined
The final color data answered.
Alternatively, the processor reads gif file data and included：
The processor reads the gif file data from external memory storage or internal storage device.
Present invention also offers a kind of device of image decoding, including processor and hardware logic electric circuit；
Wherein, the processor is used to read gif file data, according to GIF described in default GIF graphics standards rule parsing
File data, obtain using the view data after LZW encryption algorithms coding, and described image data are sent to the hardware and patrolled
Collect circuit；
The hardware logic electric circuit is used to go out LZW code words from the described image extracting data received, according to the LZW
Code word resolves to final color data, and the final color data are sent to the processor, to generate decoded figure
Picture.
Alternatively, the processor includes document analysis module：For regular by described according to default GIF graphics standards
Gif file data are divided into：File header, data flow and file terminal symbol part；Whether respective file is judged according to the file header
For legal gif file, when it is legal gif file to judge respective file, according to control identifier solution in the data flow
Analysis is per a kind of data block, untill the file terminal symbol is detected, obtains using the picture number after LZW encryption algorithms coding
According to.
Alternatively, the document analysis module is additionally operable to：When it is illegal gif file to judge respective file, output error
Prompt message, and terminate the decoding operate of GIF images.
Alternatively, the hardware logic electric circuit includes：
Code extraction module, for extracting the LZW code words of each image successively from described image data；
Code analysis module, for the obtained code word to be resolved to actual color index value；
Parsing module is indexed, the color index value and the corresponding relation of final color data pre-set for basis, really
Final color data corresponding to the fixed color index value.
The method and device of image decoding provided by the present invention, gif file data are read by processor, according to default
GIF graphics standard rule parsing gif file data, obtain using the view data after LZW encryption algorithms coding, and by picture number
According to transmission to hardware logic electric circuit；Hardware logic electric circuit extracts LZW code words from the view data received, according to LZW codes
Word resolves to final color data, and final color data are sent to processor, to generate decoded image.Institute of the present invention
The method and device of the image decoding of offer, by the parallel characteristics and pipeline organization with hardware circuit, GIF can be lifted
The execution efficiency of decoder and the handling capacity of GIF decoders.
Brief description of the drawings
, below will be to embodiment or existing for the clearer explanation embodiment of the present invention or the technical scheme of prior art
The required accompanying drawing used is briefly described in technology description, it should be apparent that, drawings in the following description are only this hair
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of existing GIF decoding techniques；
Fig. 2 is a kind of flow chart of embodiment of the method for image decoding provided by the present invention；
Fig. 3 is the flow chart that embodiment provided by the present invention is parsed to GIF images；
Fig. 4 is resolving flow figure in embodiment provided by the present invention；
Fig. 5 is the schematic diagram of another embodiment of the method for image decoding provided by the present invention；
Fig. 6 is that code extracts schematic diagram in embodiment provided by the present invention；
Fig. 7 is the structured flowchart of the device of image decoding provided by the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment is only part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
A kind of flow chart of embodiment of the method for image decoding provided by the present invention is as shown in Fig. 2 the party
Method includes：
Step S101：Processor reads gif file data, according to gif file described in default GIF graphics standards rule parsing
Data, obtain using the view data after LZW encryption algorithms coding, and described image data are sent to hardware logic electric circuit；
Specifically, described in processor can be read from external memory storage or internal storage device in the embodiment of the present invention
Gif file data.
The flow chart that 3 embodiment provided by the present invention of reference picture is parsed to GIF images, the present invention is according to default
Gif file data described in GIF graphics standard rule parsings, obtain to have using the view data after LZW encryption algorithms coding
Body includes：
Step S1011：The gif file data are divided into according to default GIF graphics standards rule：File header, data flow
With file terminal symbol part；
Step S1012：Judge whether respective file is legal gif file according to the file header, it is corresponding literary when judging
When part is legal gif file, parsed according to control identifier in the data flow per a kind of data block, until detecting described
Untill file terminal symbol, obtain using the view data after LZW encryption algorithms coding.
It may further include in this step S1012, when it is illegal gif file to judge respective file, output error
Prompt message, and terminate the decoding operate of GIF images.
Processor is according to the various pieces for presetting GIF graphics standard rule parsing gif files.Gif file can be divided into text
Three part head, data flow and file terminal symbol parts.Wherein, file header includes file signature and version number, for identifying file
Whether GIF formatted file and corresponding version are belonged to.Processor can judge whether file is legal GIF according to file header
File and corresponding version, for illegal gif file, processor exports corresponding miscue information, and terminates GIF images
Decoding process.Data flow specifically can be made up of control identifier, image block and some other expansion block.Processor is according to control
Identifier resolution processed is per a kind of data block；File terminal symbol identifies the ending of file.
Step S102：The hardware logic electric circuit goes out LZW code words from the described image extracting data received, according to institute
State LZW code words and resolve to final color data, and the final color data are sent to the processor, after being decoded with generation
Image.
Resolving flow figure in 4 embodiment provided by the present invention of reference picture, the embodiment of the present invention is from the institute received
State and LZW code words are extracted in view data, resolving to final color data according to the LZW code words can specifically include：
Step S1021：Extract the LZW code words of each image successively from described image data；
Step S1022：The obtained code word is resolved to actual color index value；
Step S1023：According to the corresponding relation of the color index value pre-set and final color data, the face is determined
Final color data corresponding to color index value.
Hardware logic electric circuit in the encoded view data of LZW encryption algorithms by by parsing each LZW code word.Will
Parse each obtained LZW code word and resolve to actual data, i.e. color index value.The face obtained according to code analysis module
Color index value, color table is searched, obtains final color data, i.e. RGB data.GIF images are real using the storage of color index table
The color data on border.That is, for R, G corresponding to each image pixel, B data, only store corresponding to the pixel color
Index value.Therefore, color table is searched, obtains actual R, G, B data, it is necessary to according to index value in decoding process.
The method of image decoding provided by the present invention, gif file data are read by processor, schemed according to default GIF
As standard rule parsing gif file data, obtain using the view data after LZW encryption algorithms coding, and view data is sent out
Deliver to hardware logic electric circuit；Hardware logic electric circuit extracts LZW code words from the view data received, according to LZW code word solutions
Analyse as final color data, and final color data are sent to processor, to generate decoded image.The application passes through fortune
With the parallel characteristics and pipeline organization of hardware circuit, the execution efficiency of GIF decoders and handling up for GIF decoders can be lifted
Amount.
Reference picture 5, the method for image decoding provided by the present invention is further elaborated on below, this method bag
Include：
Step S201：Processor is by reading GIF view data in storage device.Here, storage device can be that outside is deposited
Reservoir, such as hard disk, USB storage dishes or internal storage device, such as DDR internal memories.
Step S202：The file data that processor parsing is read.Gif file can be divided into file header, data flow and file
Three parts of terminal symbol.Wherein, file header includes file signature and version number, and file signature is used to identify whether file belongs to
GIF formatted files, version number are used for the version for representing gif file.Judge whether corresponding file is legal according to file header
Gif file and corresponding version.For illegal gif file, the document analysis module in processor exports corresponding mistake
Prompt message, prompting user's this document is not effectively GIF images, and terminate the decoding process of GIF images.Data flow is by controlling
Identifier, image block and some other expansion block composition, are parsed per a kind of data block according to control identifier.
The Part I of GIF image data streams accords with for logical screen identification, length, width comprising image, and global
The information such as the size of color table, it is immediately after corresponding global color table.One gif file can include multiple image, often
The corresponding image identifier of width image.The coordinate position of the left upper apex of image identifier including image, the length of image and
Width, and size information of local color table etc. used in the image, followed by corresponding local color table.Office
It is the view data encoded through LZW encryption algorithms after portion's color table.In addition, gif file also includes some optional extension blocks,
Extended including comment extension, graph text etc..File terminal symbol identifies the ending of file.Document analysis module parses gif file,
Obtain the data of each above-mentioned part.
Data transmission system by processor to hardware logic electric circuit direction, by the color table information of GIF images and every width
The view data that image encodes through LZW encryption algorithms is transferred to hardware logic electric circuit.Hardware logic electric circuit from view data according to
The LZW code words of secondary extraction each image.For piece image, it is continuous bit stream by the view data of LZW codings, such as
Shown in Fig. 6.Hardware logic electric circuit extracts each code word in view data bit stream according to GIF picture formats specification.Such as Fig. 6
Shown, the number of bits of first code word is 6, then reads six in bit stream, generates first code word, i.e., binary
001010, decimal value 12.Correspondingly, the number of bits of second code word is 7, then reads seven in bit stream, raw
Into second code word, i.e. binary zero 100011, decimal value 35.
Then, hardware logic electric circuit is parsed to each LZW code word of extraction, obtained according to GIF picture format specifications
To corresponding color index value.And hardware logic electric circuit searches color index table, obtains phase according to obtained color index value
R, G, the B data answered.Finally, above-mentioned R, G, B data are transferred to by the document transmission module of hardware logic electric circuit to processor
Processor carries out image presentation.
Compared to the GIF image decoders individually realized using CPU processing systems, hardware logic electric circuit uses flowing water knot
Structure, the handling capacity of processing can be obviously improved.Specifically, for CPU processing systems, every decoder instruction all correspond to fetching,
Multiple microoperations are decoded, perform and write back, it is necessary to which the multiple or even dozens of clock cycle could complete；And for hardware logic electricity
Road, designed using pipeline organization, it is not necessary to value, decode and the operation such as write back, hardware execution units are in current period logarithm
After the completion of processing, you can in the new data of next clock cycle start to process, so as to effectively lift handling up for data processing
Amount.
In addition, present invention also offers a kind of device of image decoding, such as the dress of Fig. 7 image decodings provided by the present invention
Shown in the structured flowchart put, the device specifically includes：Processor and hardware logic electric circuit.
Wherein, the processor is used to read gif file data, according to GIF described in default GIF graphics standards rule parsing
File data, obtain using the view data after LZW encryption algorithms coding, and described image data are sent to the hardware and patrolled
Collect circuit；The hardware logic electric circuit is used to go out LZW code words from the described image extracting data received, according to the LZW
Code word resolves to final color data, and the final color data are sent to the processor, to generate decoded figure
Picture.
As a kind of embodiment, the processor includes document analysis module：For according to default GIF image marks
The gif file data are divided into by quasi-regular：File header, data flow and file terminal symbol part；Judged according to the file header
Whether respective file is legal gif file, when it is legal gif file to judge respective file, according in the data flow
Control identifier parsing is per a kind of data block, untill the file terminal symbol is detected, obtains compiling using LZW encryption algorithms
View data after code.
Wherein, the document analysis module can be also used for：When it is illegal gif file to judge respective file, output is wrong
Prompt message by mistake, and terminate the decoding operate of GIF images.
On the basis of any of the above-described embodiment, in the device of image decoding provided by the present invention, the hardware logic
Circuit can specifically include：
Code extraction module, for extracting the LZW code words of each image successively from described image data；
Code analysis module, for the obtained code word to be resolved to actual color index value；
Parsing module is indexed, the color index value and the corresponding relation of final color data pre-set for basis, really
Final color data corresponding to the fixed color index value.
The device of image decoding provided by the present invention, gif file data are read by processor, schemed according to default GIF
As standard rule parsing gif file data, obtain using the view data after LZW encryption algorithms coding, and view data is sent out
Deliver to hardware logic electric circuit；Hardware logic electric circuit extracts LZW code words from the view data received, according to LZW code word solutions
Analyse as final color data, and final color data are sent to processor, to generate decoded image.It is provided by the present invention
Image decoding device, by with hardware circuit parallel characteristics and pipeline organization, holding for GIF decoders can be lifted
The handling capacity of line efficiency and GIF decoders.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.For dress disclosed in embodiment
For putting, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part
Explanation.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The method and device of image decoding provided by the present invention are described in detail above.It is used herein
Specific case is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands this
The method and its core concept of invention.It should be pointed out that for those skilled in the art, this hair is not being departed from
On the premise of bright principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into power of the present invention
In the protection domain that profit requires.
Claims (9)
- A kind of 1. method of image decoding, it is characterised in that including：Processor reads gif file data, according to gif file data described in default GIF graphics standards rule parsing, is used View data after LZW encryption algorithms coding, and described image data are sent to hardware logic electric circuit；The hardware logic electric circuit goes out LZW code words from the described image extracting data received, is parsed according to the LZW code words For final color data, and the final color data are sent to the processor, to generate decoded image.
- 2. the method for image decoding as claimed in claim 1, it is characterised in that the basis presets GIF graphics standards rule The gif file data are parsed, obtain including using the view data after LZW encryption algorithms coding：The gif file data are divided into according to default GIF graphics standards rule：File header, data flow and file terminal symbol portion Point；Judge whether respective file is legal gif file according to the file header, when judgement respective file is legal GIF texts During part, parsed according to control identifier in the data flow per a kind of data block, untill the file terminal symbol is detected, Obtain using the view data after LZW encryption algorithms coding.
- 3. the method for image decoding as claimed in claim 2, it is characterised in that judge to correspond to according to the file header described Whether file is that legal gif file also includes afterwards：When it is illegal gif file to judge respective file, output error prompt message, and terminate the decoding operate of GIF images.
- 4. the method for the image decoding as described in any one of claims 1 to 3, it is characterised in that described described in receive LZW code words are extracted in view data, resolving to final color data according to the LZW code words includes：Extract the LZW code words of each image successively from described image data；The obtained code word is resolved to actual color index value；According to the corresponding relation of the color index value pre-set and final color data, determine corresponding to the color index value Final color data.
- 5. the method for image decoding as claimed in claim 4, it is characterised in that the processor reads gif file packet Include：The processor reads the gif file data from external memory storage or internal storage device.
- 6. a kind of device of image decoding, it is characterised in that including processor and hardware logic electric circuit；Wherein, the processor is used to read gif file data, according to gif file described in default GIF graphics standards rule parsing Data, obtain using the view data after LZW encryption algorithms coding, and described image data are sent to hardware logic electricity Road；The hardware logic electric circuit is used to go out LZW code words from the described image extracting data received, according to the LZW code words Final color data are resolved to, and the final color data are sent to the processor, to generate decoded image.
- 7. the device of image decoding as claimed in claim 6, it is characterised in that the processor includes document analysis module： For the gif file data to be divided into according to default GIF graphics standards rule：File header, data flow and file terminal symbol portion Point；Judge whether respective file is legal gif file according to the file header, when judgement respective file is legal GIF texts During part, parsed according to control identifier in the data flow per a kind of data block, untill the file terminal symbol is detected, Obtain using the view data after LZW encryption algorithms coding.
- 8. the device of image decoding as claimed in claim 7, it is characterised in that the document analysis module is additionally operable to：When sentencing When to determine respective file be illegal gif file, output error prompt message, and terminate the decoding operate of GIF images.
- 9. the device of the image decoding as described in any one of claim 6 to 8, it is characterised in that the hardware logic electric circuit bag Include：Code extraction module, for extracting the LZW code words of each image successively from described image data；Code analysis module, for the obtained code word to be resolved to actual color index value；Parsing module is indexed, for the corresponding relation according to the color index value pre-set and final color data, determines institute State final color data corresponding to color index value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113326086A (en) * | 2021-05-18 | 2021-08-31 | 翱捷科技股份有限公司 | GIF picture display method and device based on LVGL |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020038006A (en) * | 2000-11-16 | 2002-05-23 | 윤춘영 | Extraction of numbers out of a image |
| CN102970530A (en) * | 2012-10-23 | 2013-03-13 | 重庆大学 | Graphic interchange format (GIF) image encryption method based on compressed encoding |
| CN105120293A (en) * | 2015-08-26 | 2015-12-02 | 中国航空工业集团公司洛阳电光设备研究所 | Image cooperative decoding method and apparatus based on CPU and GPU |
| CN107105266A (en) * | 2017-05-22 | 2017-08-29 | 郑州云海信息技术有限公司 | A kind of coding/decoding method, the apparatus and system of PNG images |
-
2017
- 2017-10-27 CN CN201711022316.0A patent/CN107705340A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020038006A (en) * | 2000-11-16 | 2002-05-23 | 윤춘영 | Extraction of numbers out of a image |
| CN102970530A (en) * | 2012-10-23 | 2013-03-13 | 重庆大学 | Graphic interchange format (GIF) image encryption method based on compressed encoding |
| CN105120293A (en) * | 2015-08-26 | 2015-12-02 | 中国航空工业集团公司洛阳电光设备研究所 | Image cooperative decoding method and apparatus based on CPU and GPU |
| CN107105266A (en) * | 2017-05-22 | 2017-08-29 | 郑州云海信息技术有限公司 | A kind of coding/decoding method, the apparatus and system of PNG images |
Non-Patent Citations (2)
| Title |
|---|
| 何益波: "自动售货机多媒体控制单元的研究与设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 曹鸿: "一种可交换图形格式文件显示模型", 《计算机时代》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113326086A (en) * | 2021-05-18 | 2021-08-31 | 翱捷科技股份有限公司 | GIF picture display method and device based on LVGL |
| CN113326086B (en) * | 2021-05-18 | 2022-08-23 | 翱捷科技股份有限公司 | GIF picture display method and device based on LVGL |
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