Gain adjustment processing-based fingerprint imaging method

A technology of gain adjustment and imaging method, which can be used in the acquisition/organization of fingerprints/palmprints, print image acquisition, detection of live finger shapes, etc. Effect

Active Publication Date: 2016-12-07
世维人工智能(嘉兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of illegal fingerprints caused by fingerprints left in the above-mentioned prior art, and to provide a fingerprint reader suitable for automatic adjustment processing wi...

Method used

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Embodiment 1

[0034] A fingerprint imaging method for gain adjustment processing, which is suitable for a fingerprint identification device, the fingerprint identification device includes a sensing surface, a processor and a memory, and the sensing surface is filled with a sensor array formed by uniform arrangement of sensor elements , the sensing surface and memory are electrically connected to the processor, characterized in that: comprising the following steps:

[0035] Step 1: The fingerprint identification device is initialized every time it is restarted, and the fingerprint identification device performs original vacant image acquisition in the case of vacancy;

[0036] Step 2: Calculate the background noise based on the original empty image;

[0037] Step 3: collect the original fingerprint image;

[0038] Step 4: Make a preliminary judgment based on the original fingerprint image. If the original fingerprint image meets the set threshold, the processor will judge whether to perform...

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PUM

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Abstract

The invention relates to a gain adjustment processing-based fingerprint imaging method and overcomes the deficiencies in the prior art. According to the technical scheme, the method comprises the following steps of 1: performing initialization operation when a fingerprint identification apparatus is re-started each time, and performing original vacant image acquisition by the fingerprint identification apparatus under the vacant condition; 2: performing background noise calculation according to the original vacant image; 3: acquiring an original fingerprint image; 4: performing preliminary judgment according to the original fingerprint image, and if the original fingerprint image meets the requirement of a set threshold, judging whether gain adjustment is performed or not, or otherwise, performing the step 3 again; 5: removing background noises in the original fingerprint image according to a background noise calculation result; 6: performing overall gain adjustment on the denoised image; and 7: obtaining the adjusted image, ending the process, and skipping to and performing the step 3 during next fingerprint identification.

Description

technical field [0001] The invention relates to a fingerprint identification method, in particular to a fingerprint imaging method for gain adjustment processing. Background technique [0002] At present, most of the domestic fingerprint recognition technologies are based on image recognition technology. Generally speaking, when the finger is photographed on the recognizer, the image of the finger is obtained and then compared. However, fingerprint identification in optical form requires a larger volume, more sensing elements, and higher cost. Although the recognition rate is high, there are many problems in some places where the volume of the elements is required, for example, Nowadays, it is difficult to achieve correct identification through optical identification for fingerprint unlocking of mobile phones. Under normal circumstances, it is difficult to achieve such a small volume. In the case of mobile phones with a high degree of integration, it is difficult to meet the...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/40
CPCG06V40/1347G06V40/1388G06V40/1306G06V10/30
Inventor 吴洋
Owner 世维人工智能(嘉兴)有限公司
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