Channel scanning method for fingerprint recognition

A scanning method and fingerprint recognition technology, applied in character and pattern recognition, acquisition/organization of fingerprints/palmprints, instruments, etc., can solve the problems of affecting the accuracy of fingerprint recognition, and it is difficult to have the same channels, so as to increase the system cost and eliminate the Effects of channel differences, improved accuracy and speed

Inactive Publication Date: 2018-09-14
南京芯思科技有限公司
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  • Abstract
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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 gra

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  • Channel scanning method for fingerprint recognition
  • Channel scanning method for fingerprint recognition
  • Channel scanning method for fingerprint recognition

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[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0026] In this example, see figure 1 As shown, the present invention proposes a kind of channel scanning method for fingerprint identification, comprising steps:

[0027] Scan the fingerprint image through the image scanning sensor;

[0028] Connect each scanned pixel to multiple channels;

[0029] Each pixel is amplified and converted through each channel in turn to obtain the recognition result of each channel, and there is a difference value in the recognition result of each channel;

[0030] The total difference value of each pixel under multiple channels is the sum of the difference values ​​of each channel;

[0031] Continuously collect multiple times for each pixel, and use the product of the number of acquisitions and the total difference value as the pixel dif...

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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...

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/13G06V40/1365
Inventor 余佳余扬
Owner 南京芯思科技有限公司
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