Automatic identification method for identification photo background and system thereof

Abstract

The invention provides an automatic identification method for an identification photo background and an automatic identification system for the identification photo background, which comprises the steps of calculating pixel ratio of all kinds of colors of a photo to be processed, analyzing various possible candidate background colors of the photo to be processed, respectively calculating the edge curve of each candidate background color to obtain a plurality of edge curves which may be the image background color, and then fitting the similarity between the edge curve of the each candidate background color with a background outline line in an identification characteristic bank, regarding the edge curve of the most similar candidate curve as the background outline line most approaching to the photo to be processed, regarding the background outline line in the characteristic bank corresponding to the edge curve of the candidate background color to select a preliminary background image of the photo to be processed, and then precisely positioning the background outline line of the preliminary background image to obtain a precise background image area. The invention is capable of fast, automatically and precisely identifying the image background area in the identification photo so as to improve the identification photo processing efficiency.

Description

technical field [0001] The invention relates to the technical field of photo image processing, in particular to a method for automatically recognizing the background of a certificate photo, and a system for automatically recognizing the background of a certificate photo. Background technique [0002] When applying for statutory documents such as passports, visas, travel permits, driver's licenses, ID cards, etc., the issuing authority will require the applicant to submit the applicant's personal and recent bareheaded electronic photos at the same time as submitting the application materials, and in the background, pixels, specifications There are strict technical requirements in terms of color, expression, posture, and clothing. Especially for the background of the ID photo, the requirements for the background of the photo are different according to different regions and different types of documents. For example, the second-generation ID card in Guangdong requires a white ba...

AI Technical Summary

Problems solved by technology

In actual operation, the existing methods mainly have the following deficiencies. First, the existing methods require professional operators who have a certain image processing foundation to participate in the manual operation, and the accuracy of the background area of ​​the acquired image is low, especially when the background color and When the color of the clothes of the ID portrait is similar, or there are many noises or shadows on the edge of the image, it is difficult to accurately obtain the background color. It requires technicians to manually erase the background area multiple times to completely replace it, which seriously affects the ID photo. Post-production efficiency; because the existing method is too dependent on manual work and the efficiency is not high, it cannot be applied to the acquisition of the background area of ​​the license image for self-service camera equipment, and cannot meet the development requirements of self-service equipment to automatically obtain the background area of ​​the license image. Application requirements that cannot be extended to the general population to take self-service ID photos

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