Fingerprint photograph compression transmission method and system

Abstract

The invention discloses a fingerprint photograph compression transmission method and system. The method comprises: obtaining a fingerprint original picture and the information value of pixel points on the fingerprint original picture; setting an information threshold of pixel points, and generating a binary picture; and performing bit compression on the binary picture, and performing transmission. The fingerprint photograph compression transmission method and system can greatly reduce a data size and hardware memory usage, improve a transmission effect, and generate no harmful influence to a real flow in an application scenario.

Description

technical field [0001] The invention relates to the technical field of biometric identification, in particular to a method and system for compressing and transmitting fingerprint photos. Background technique [0002] In the prior art of fingerprint recognition, to read the feature code, it is necessary to binarize the collected fingerprint picture, and then carry out algorithmic recognition on the characteristic parts on it to generate a specific feature code. However, due to the large amount of data of the originally collected fingerprint pictures, there will be a great delay effect when passing through a low-speed transmission channel such as a serial port. [0003] The essence of binarization in the fingerprint identification scheme is to remove irrelevant interference and strengthen the characteristic information. The original fingerprint image will produce some impurity information due to the difference of the sensor, which is expressed as a small range after the byte o...

AI Technical Summary

Problems solved by technology

[0006] The unevenness of the fingerprint is the most obvious in this level change. The grayscale value of RGB changes between 0x00~0xff. If it is concave, it will appear white on the picture, but the grayscale value is generally not Reaching 0xff, similarly, black will not be all 0x00, usually fluctuating in a small range, such as 0x10~0x23, but the range of difference between black and white will be very large

[0007] Since the image is not further compressed after binarization, the amount of image information to be transmitted is still huge and occupies a large space. Therefore, the requirements for the machine are relatively high during transmission, and because of its large amount of calculation, the current stock machines, such as When a machine with small memory such as a single-line 8-bit machine is operating, the overall load is heavy, and it may even cause a crash

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