Channel scanning method for fingerprint recognition

Abstract

The invention discloses a channel scanning method for fingerprint recognition. The method includes the following steps that: a fingerprint image is scanned through an image scanning sensor; scanned each pixel is connected with a plurality of channels; each pixel is amplified and converted sequentially through each channel, so that the recognition result of each channel can be obtained, wherein therecognition result of the channel has a difference value; the total difference value of each pixel under the plurality of channels is the sum of the difference values of the channels; each pixel is acquired a plurality of times continuously, the product of the number of the times of acquisition and the total difference value is adopted as a pixel difference value; fingerprint image conversion iscarried out on the basis of the pixel difference value, so that a recognition image can be obtained. With the channel scanning method for fingerprint recognition of the invention adopted, differencesbetween the scanning channels can be completely eliminated, and the precision and speed of fingerprint recognition can be improved.

Description

technical field [0001] The invention belongs to the technical field of fingerprint identification, in particular to a channel scanning method for fingerprint identification. Background technique [0002] Nowadays, with the development of the Internet and mobile payment, a variety of biometric technologies represented by fingerprint recognition have increasingly become an important means of identifying identities in the Internet age. [0003] A complete set of fingerprint identification products or solutions includes three necessary elements: fingerprint sensor, fingerprint algorithm processing chip and fingerprint algorithm software. There are many different ways for a fingerprint reader to read fingerprints, but the specific technology mainly involves four functions: reading fingerprint images, extracting features, saving data and comparing. The image of the human fingerprint is read through the fingerprint reading device, and then the original image needs to be preliminar...

AI Technical Summary

Problems solved by technology

[0006] However, in the manufacturing process of the image sensor chip, although the design of multiple analog channels is the same, it is difficult to make each channel exactly the same due to the gradient effect caused by the dopant concentration in the manufacturing process.

Therefore, each channel has a deviation from the design value, which greatly affects the accuracy of fingerprint recognition

Images