Method for screening certificate photos

A screening method, photo technology, applied in computer parts, instruments, character and pattern recognition, etc., can solve problems such as unqualified photo quality requirements

Inactive Publication Date: 2009-12-30
SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to technical problems or sloppy operators or deliberate spoofing b

Method used

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  • Method for screening certificate photos
  • Method for screening certificate photos
  • Method for screening certificate photos

Examples

Experimental program
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Embodiment Construction

[0031] The present invention will be further described below in conjunction with embodiment.

[0032] One and only one frontal face in a photo is the most basic requirement for a photo ID, so face detection technology can be used to judge whether the photo meets this requirement based on this. If no face is detected or multiple faces are detected, it is considered unqualified; if only one face is detected, the photo can be considered qualified. In addition, some other conditions can be added to grade the qualified photos. Such as: eye distance, the angle between the line connecting the pupils of the two eyes and the horizontal, the depth and rotation angle of the face, the width and height of the entire photo, the proportion of a single grayscale color in the face area, and the maximum difference in grayscale in the face area , the mean value of the gray scale in the face area, and whether the face has obvious polarization.

[0033] A screening method for certificate photos,...

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PUM

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Abstract

The invention relates to a method for screening certificate photos. On the basis of software for processing portrait photos, the method is characterized by comprising the following steps: detecting the number of human faces in each photo; positioning human eyes in each photo, and detecting the distance between two eye positions and the inclined angle formed by a connecting line of pupils of two eyes and the horizontal line; detecting the distances from the middle point of the connecting line of the two eyes to upper, lower, left and right edges, and comparing the distances with the distance between the two eye positions; detecting the width and the height of the photo, and comparing the width and the height with the distance between the two eye positions; positioning the human face areas in each photo, detecting the proportion of each grey scale or gray scale zone in the human face areas, detecting the contrast grade of the gray scale in the human face areas, and detecting the average value of the gray scale in the human face areas; and detecting whether the human face areas have polarization phenomena. The method has the advantage of effectively and quickly detecting the quality of the acquired photos.

Description

technical field [0001] The invention relates to a screening method for certificate photos. Background technique [0002] Many organizations now collect a lot of ID photos, such as: second-generation ID card photos, passport photos, driver's license photos, and so on. Due to technical problems or sloppy operators or deliberate spoofing by operators, the quality of some photos did not meet the requirements. Therefore, it is necessary to check the quality of the existing collected photos and the photos being collected on site for further processing. Contents of the invention [0003] The object of the present invention is to provide a screening method for certificate photos, which can check the quality of existing collected photos and photos being collected on site for further processing. [0004] To achieve the above object, the present invention adopts the following technical solutions: [0005] The invention discloses a method for screening certificate photos, which is ...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 赵文忠
Owner SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH
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