Face photo sunglass automatic removing method based on gray histogram matching

A gray histogram, sunglasses technology, applied in the direction of instruments, character and pattern recognition, computer parts, etc. Accuracy and the effect of improving the recognition rate

Active Publication Date: 2017-04-19
黄开竹 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After experiments, it was found that once the face wears colored sunglasses, the recognition rate will be greatly reduced, which will seriously affect the promotion and application of this technology

Method used

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  • Face photo sunglass automatic removing method based on gray histogram matching
  • Face photo sunglass automatic removing method based on gray histogram matching
  • Face photo sunglass automatic removing method based on gray histogram matching

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Embodiment

[0056] Embodiment: a kind of face photo sunglasses automatic removal method based on grayscale histogram matching: use a kind of method based on " active shape model (Active Shape Model: ASM) ", automatically locate the facial features outline ( Eyes, eyebrows, nose, mouth, ears) and the outline of the whole face; thereafter, according to the intercepted eyebrow and eye contour position information, through the method of image cutting, automatically cut out the target image area that may wear glasses; analysis And process the obtained outline to judge whether to wear sunglasses; thereafter, for the cut image area, the method of grayscale histogram matching and the histogram data (target histogram) of not wearing sunglasses stored in the database , automatically match the gray distribution histogram of the target image area to the target histogram, so as to obtain the effect of automatic removal of sunglasses. The described method comprises the following steps:

[0057] The fi...

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Abstract

The invention discloses a face photo sunglass automatic removing method based on gray histogram matching. The method comprises the following steps that an acquired initial face image is obtained so that full face contour line description information and facial organ feature point position and facial organ contour line information are obtained according to feature point information; the concrete positions of the feature points describing left and right eyes and two eyebrows are obtained, and the transverse and vertical extreme values of the left and right eyes are obtained so as to outline a target image area; a reference face image having no wearing of sunglasses is obtained; the gray histogram of the eyebrow area and the eye area in the target image area is calculated according to the obtained positions of the left and right eyes and the two eyebrows; histogram equalization operation is performed on the modified target image gray histogram, and the gray distribution of the modified target image gray histogram completely covers [0,255]; and the union set of the obtained sunglass target area is obtained and the modified sunglass target area is obtained. The final recognition rate can be greatly enhanced so that the usability and the practicality of the technology can be enhanced.

Description

technical field [0001] The present invention relates to a method of face recognition and related fields, in particular to a method for automatically removing sunglasses from a face photo based on grayscale histogram matching. Background technique [0002] Face recognition technology is a hot area of ​​research and application in areas such as machine learning, pattern recognition, and computer vision. This technology is directly based on human facial feature information for identification or other facial information extraction and judgment, and is widely used in security fields (access control systems or surveillance systems, smartphone unlocking applications), entertainment fields (games, facial expression imitation ) and service areas (service robots). [0003] Related prior art in this field mainly focuses on the extraction and recognition of not wearing any shields (including glasses, hats or masks); for face photos wearing glasses, it also mainly focuses on wearing gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34
CPCG06V40/161G06V40/168G06V10/273
Inventor 黄开竹江浩川
Owner 黄开竹
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