CN107509081A - A kind of image compression encoding method for recognition of face - Google Patents
A kind of image compression encoding method for recognition of face Download PDFInfo
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- CN107509081A CN107509081A CN201710724062.0A CN201710724062A CN107509081A CN 107509081 A CN107509081 A CN 107509081A CN 201710724062 A CN201710724062 A CN 201710724062A CN 107509081 A CN107509081 A CN 107509081A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/162—Detection; Localisation; Normalisation using pixel segmentation or colour matching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
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Abstract
The present invention discloses a kind of image compression encoding method for recognition of face, comprises the following steps：Data block is decomposed into after S101, the color space conversion that recognition of face image will be inputted；S102, with positive two-dimensional dct each block is transformed into DCT coefficient value；S103, DCT coefficient is quantified, the DCT coefficient for converting obtained quantization is encoded and transmitted, completes the compression of image；S104, in decoding process, formed compression after picture format, encoded quantization DCT coefficient is decoded, invert quantify and DCT coefficient is converted into sample picture block；S105, the block after the completion of operation is combined into single image, completes the decompression of image.The present invention can be compressed coding to facial image to be identified, significantly reduce the size and complexity of face image data, add the capacity of recognizable face.
Description
Technical field
The present invention relates to technical field of face recognition, more particularly to a kind of image compression encoding side for recognition of face
Method.
Background technology
As the fast development of China's electronics industry and the communications industry, and requirement of the user to electronic equipment or terminal are got over
Come more, in the market face recognition products are also increasing.Recognition of face is that the facial feature information based on people carries out identity knowledge
A kind of other biological identification technology.At present, it is many to be widely used to finance, public security, frontier inspection, education, medical treatment etc. for recognition of face
Field.Wherein, dynamic realtime face identification system has important application in security protection industry.But carry in the prior art
The product of face identification functions generally realizes that application function is more, is limited by its own function and its computing capability, it is necessary to
Coding compression is carried out to face image data.
The content of the invention
It is an object of the invention to by a kind of image compression encoding method for recognition of face, to solve background above
The problem of technology segment is mentioned.
To use following technical scheme up to this purpose, the present invention：
A kind of image compression encoding method for recognition of face, it comprises the following steps：
Data block is decomposed into after S101, the color space conversion that recognition of face image will be inputted；
S102, with positive two-dimensional dct each block is transformed into DCT coefficient value, wherein 1 numerical value is DC coefficient, 8 × 8
The average value of spatial domain picture sub-block, remaining is ac coefficient；
S103, DCT coefficient is quantified, the DCT coefficient for converting obtained quantization is encoded and transmitted, complete figure
The compression of picture；
S104, in decoding process, formed compression after picture format, encoded quantization DCT coefficient is solved
Code, invert and quantify and DCT coefficient is converted into sample picture block；
S105, the block after the completion of operation is combined into single image, completes the decompression of image.
Especially, the step S101 is specifically included：Image collecting device is scanned to facial image, and it is special to obtain face
Levy the image of key area；The image of mark near face is captured, and characteristics of image is extracted, pre-processes out crucial figure
As output.
Especially, the step S102 also includes：Edge treated is carried out to image to be compressed, obtains the multi-layer image of image
Restructuring and two-dimentional difference.
Image compression encoding method proposed by the present invention for recognition of face can be carried out to facial image to be identified
Compressed encoding, in the case of distortionless, the size and complexity of face image data are significantly reduced, alleviates recognition of face
The computing pressure of processor, add the capacity of recognizable face.
Brief description of the drawings
Fig. 1 is the image compression encoding method flow chart provided in an embodiment of the present invention for recognition of face.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the more thorough of the disclosure understanding
Comprehensively.It should be noted that when an element is considered as " connection " another element, it can be directly to another
Element may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article with
The implication that the those skilled in the art for belonging to of the invention are generally understood that is identical.Made in the description of the invention herein
Term is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.Term as used herein
" and/or " include the arbitrary and all combinations of one or more related Listed Items.
It refer to shown in Fig. 1, Fig. 1 is the method flow diagram that two-layer network exchanger of the present invention realizes DHCPv6 relayings.
Image compression encoding method in the present embodiment for recognition of face specifically comprises the following steps：
Data block is decomposed into after S101, the color space conversion that recognition of face image will be inputted.Image collecting device is to people
Face image is scanned, and obtains the image of face characteristic key area；The image of mark near face is captured, and it is special to image
Sign is extracted, and pre-processes out key images output.
S102, with positive two-dimensional dct each block is transformed into DCT coefficient value, wherein 1 numerical value is DC coefficient, 8 × 8
The average value of spatial domain picture sub-block, remaining is ac coefficient.Edge treated is carried out to image to be compressed, obtains the multilayer of image
Image reorganization and two-dimentional difference.
S103, DCT coefficient is quantified, the DCT coefficient for converting obtained quantization is encoded and transmitted, complete figure
The compression of picture；
S104, in decoding process, formed compression after picture format, encoded quantization DCT coefficient is solved
Code, invert and quantify and DCT coefficient is converted into sample picture block；
S105, the block after the completion of operation is combined into single image, completes the decompression of image.
Technical scheme proposed by the present invention can be compressed coding to facial image to be identified, in distortionless situation
Under, the size and complexity of face image data are significantly reduced, the computing pressure of facial recognition processor is alleviated, adds
The capacity of recognizable face.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (3)
1. a kind of image compression encoding method for recognition of face, it is characterised in that comprise the following steps：
Data block is decomposed into after S101, the color space conversion that recognition of face image will be inputted；
S102, with positive two-dimensional dct each block is transformed into DCT coefficient value, wherein 1 numerical value is DC coefficient, 8 × 8 spatial domains
The average value of image subblock, remaining is ac coefficient；
S103, DCT coefficient is quantified, the DCT coefficient for converting obtained quantization is encoded and transmitted, completes image
Compression；
S104, in decoding process, formed compression after picture format, encoded quantization DCT coefficient is decoded, asked
DCT coefficient is simultaneously converted into sample picture block by re-quantization；
S105, the block after the completion of operation is combined into single image, completes the decompression of image.
2. the image compression encoding method according to claim 1 for recognition of face, it is characterised in that the step
S101 is specifically included：Image collecting device is scanned to facial image, obtains the image of face characteristic key area；Capture people
The image of mark near face, and characteristics of image is extracted, pre-process out key images output.
3. the image compression encoding method according to claim 1 for recognition of face, it is characterised in that the step
S102 also includes：Edge treated is carried out to image to be compressed, obtains the multi-layer image restructuring of image and two-dimentional difference.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710724062.0A CN107509081A (en) | 2017-08-22 | 2017-08-22 | A kind of image compression encoding method for recognition of face |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710724062.0A CN107509081A (en) | 2017-08-22 | 2017-08-22 | A kind of image compression encoding method for recognition of face |
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| CN107509081A true CN107509081A (en) | 2017-12-22 |
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| CN201710724062.0A Withdrawn CN107509081A (en) | 2017-08-22 | 2017-08-22 | A kind of image compression encoding method for recognition of face |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110176027A1 (en) * | 2008-10-29 | 2011-07-21 | Panasonic Corporation | Method and device for compressing moving image |
| CN102724552A (en) * | 2012-05-30 | 2012-10-10 | 华为技术有限公司 | Image coding method, image decoding method and device |
| CN103517072A (en) * | 2012-06-18 | 2014-01-15 | 联想(北京)有限公司 | Video communication method and video communication equipment |
| CN103647922A (en) * | 2013-12-20 | 2014-03-19 | 百度在线网络技术（北京）有限公司 | Virtual video call method and terminals |
| CN106060400A (en) * | 2016-06-27 | 2016-10-26 | 乐山职业技术学院 | Image processing system and method based on FPGA |
-
2017
- 2017-08-22 CN CN201710724062.0A patent/CN107509081A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110176027A1 (en) * | 2008-10-29 | 2011-07-21 | Panasonic Corporation | Method and device for compressing moving image |
| CN102724552A (en) * | 2012-05-30 | 2012-10-10 | 华为技术有限公司 | Image coding method, image decoding method and device |
| CN103517072A (en) * | 2012-06-18 | 2014-01-15 | 联想(北京)有限公司 | Video communication method and video communication equipment |
| CN103647922A (en) * | 2013-12-20 | 2014-03-19 | 百度在线网络技术（北京）有限公司 | Virtual video call method and terminals |
| CN106060400A (en) * | 2016-06-27 | 2016-10-26 | 乐山职业技术学院 | Image processing system and method based on FPGA |
Non-Patent Citations (1)
| Title |
|---|
| 徐萍: "基于JPEG的感兴趣图像区域压缩算法的设计与实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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Application publication date: 20171222 |