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Fingerprint Imaging Method Based on Gain Adjustment Processing

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

Active Publication Date: 2019-02-12
世维人工智能(嘉兴)有限公司
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  • Summary
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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 with a smaller volume, which has a higher recognition degree and a faster recognition speed, and at the same time , a fingerprint imaging method that can remove the gain adjustment processing of illegal fingerprints caused by fingerprint legacy

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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Abstract

The invention relates to a fingerprint imaging method for gain adjustment processing, which solves the deficiencies of the prior art. The technical solution includes the following steps: Step 1: each time the fingerprint identification device is restarted, the initialization operation is performed, and the fingerprint identification device is initialized when it is empty. The identification device collects the original vacant image; step 2: calculate the background noise according to the original vacant image; step 3: collect the original fingerprint image; step 4: make a preliminary judgment according to the original fingerprint image, if the original fingerprint image meets the set threshold, if If the original fingerprint image does not meet the set threshold, re-execute step three; step five: remove the background noise in the original fingerprint image according to the background noise calculation result; step six: adjust the overall gain of the image after noise reduction; step seven: Obtain the adjusted image and end, skip to Step 3 in the next fingerprint recognition.

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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Patent Type & Authority Patents(China)
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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