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Image feature extraction method and apparatus

An image feature extraction and image technology, applied in the field of image recognition, can solve problems such as inaccurate face recognition results, and achieve the effect of improving accuracy

Inactive Publication Date: 2017-01-04
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the algebraic features of the face are easy to obtain, the algebraic features are sensitive to changes in facial posture, expression, etc., which leads to inaccurate results of face recognition.

Method used

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  • Image feature extraction method and apparatus
  • Image feature extraction method and apparatus
  • Image feature extraction method and apparatus

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Experimental program
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Embodiment 1

[0054] The embodiment of the present invention provides an image feature extraction method, such as figure 1 As shown, the method can include:

[0055] Step 101: Divide the image into blocks to obtain each image block of the image, where any image block has an overlapping area with at least one of the other image blocks in the image except the own image block.

[0056] Here, the method provided by the embodiment of the present invention is mainly applied to the extraction of facial features. The image that needs to be extracted is generally a facial image. Therefore, before this type of image is divided into blocks, the part that does not contain facial information can be cropped in advance. Such as figure 2 As shown, the image includes the face and upper body of the person. Therefore, the image can be cut out except for the face of the person to obtain image 3 The picture shown is then divided into blocks to reduce the feature generation of useless information.

[0057] For most i...

Embodiment 2

[0105] The embodiment of the present invention provides an image feature extraction device 20, such as Picture 8 As shown, the device 20 may include:

[0106] The block division unit 201 is configured to block an image to obtain each image block of the image, wherein any image block has an overlap with at least one of the other image blocks in the image except its own image block area.

[0107] The extraction unit 202 is configured to extract the features of each image block.

[0108] In this way, if the method of the embodiment of the present invention is used for image segmentation, any image block obtained will have an overlapping area with other image blocks. Therefore, the features of the overlapping area will be extracted multiple times; accordingly, the extracted The features of the image will increase, and the features included in these features that contain effective information (information that needs to be recognized) will also increase. In this way, more features contai...

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Abstract

The embodiment of the invention discloses an image feature extraction method. The method comprises the steps of dividing an image into blocks to obtain the image blocks of the image, wherein any image block is overlapped with at least one image block among all the other image blocks except the above first image block; extracting the feature of each image block. The embodiment of the invention also discloses an image feature extraction apparatus.

Description

Technical field [0001] The present invention relates to image recognition technology, in particular to an image feature extraction method and device. Background technique [0002] Face recognition is an emerging biometric recognition technology. Compared with iris recognition, fingerprint scanning, palm scanning and other technologies, face recognition has the characteristics of high accuracy, ease of use, high stability, difficult to counterfeit, and high cost performance. Broad market application prospects. The specific process of face recognition can be divided into the following three parts: face detection, feature extraction, and face recognition; among them, feature extraction is the key technology for studying face recognition. [0003] In the prior art, feature extraction mainly extracts the algebraic features of the face; specifically, the algebraic feature is to obtain an average face image from the face images in the test face database, and then calculate the difference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/172G06V40/168G06V10/467G06V10/50G06V10/54G06V10/764G06F18/2411G06V40/171
Inventor 高峰
Owner SANECHIPS TECH CO LTD