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Identification method for an identification system

a technology of identification system and identification method, which is applied in the field of identification system, can solve the problems of inability to reset fingerprints, personal devices and information security threats, and inability to identify fingerprints absolutely safe, so as to increase the security and identification capabilities of the identification system, and prevent others

Active Publication Date: 2022-08-11
GUANGZHOU TYRAFOS SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an identification method that uses an image sensor to generate a dynamic image of the test object in a time range. The dynamic image includes a plurality of interval images, where the time range includes a plurality of exposure intervals. This results in a perspective image that can effectively prevent others from using fingerprint images, pictures, or other models to crack the identification system, thus increasing the security and identification capabilities of the identification system. Additionally, the processing module executes an algorithm that subtracts dynamic images at different exposure time intervals from each other, resulting in a better fingerprint identification effect. Therefore, the FAR and FRR of the identification system according to the present invention are greatly improved to achieve the goals of high accuracy and wide applicability.

Problems solved by technology

However, fingerprint identification is not absolutely safe.
Once the fingerprint is obtained and restored, personal devices and information security are at risk.
Moreover, compared to password, the password can be reset even if cracked, but the fingerprint cannot be reset.
Hence, how to improve the security and identification ability of fingerprint identification is one of the problems that R&D personnel should solve.

Method used

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  • Identification method for an identification system
  • Identification method for an identification system

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first embodiment

[0052]Specifically, referring to FIG. 4, the identification system 100 according to the present invention further includes a processing module 14, coupled to the identification module 13, and the processing module 14 is for executing an algorithm to perform a subtraction operation on the interval images 23 and generate a plurality of subtraction signal (not shown), but the present invention is not limited to herein.

[0053]Specifically, referring to FIG. 5, the image sensor 12 according to the first embodiment of the present invention further includes a plurality of light sensors 121 and a complementary metal oxide semiconductor (CMOS) 122, wherein the light sensors 121 are arranged in an array, and the light sensors 121 are used to generate image intensity information (not shown), and generate a dynamic image 21 based on the image intensity information; the CMOS 122 is coupled to the light sensor 121 to control the output of the image intensity information. It should be further noted...

second embodiment

[0072]It should be further explained that, the processing module 14 of the present invention executes an algorithm to perform a subtraction operation on the interval images 23 of different exposure intervals 32 in the time range 31, and the algorithm is to subtract the intervals images 23 of the previous exposure interval 31 from the interval images 23 of the next exposure interval 32 in the time range 31, which is different from the conventional technology that only uses the interval images 23 of different exposure intervals 32 to perform addition operations to obtain an average value, or simply deducting the empty background value and then performing an addition operation to obtain an average value of the interval images 23. The identification system 100 according to the present invention can effectively eliminate the noise in the dynamic image 21, so that the RV value of the dynamic image 21 is greatly improved, thereby resulting in a better fingerprint identification effect.

[007...

third embodiment

[0092]Fourth, in the third embodiment, one of the better interval images 22 is selected as the background interval image in the selection step S23″, which effectively eliminates the noise in other interval images 23, resulting in significant reduction in the image intensity information, so that the ridge valley value (RV) of the dynamic images 21 after the enlargement operation is further improved.

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Abstract

Provided is an identification method for an identification system, which includes a sensing area and an image sensor. First, a test object is close to the sensing area, so that the image sensor generates a dynamic image. Next, the test object gradually pressurizes the sensing area. Then, the test object completely covers the sensing area, and the image sensor further produces a perspective image. Finally, an identification module is used to determine whether the dynamic image is a biological image according to the perspective image, and to perform a subtraction operation on the dynamic image as a basis to determine whether to unlock the identification system. Therefore, the identification system and the identification method can achieve a real-time determination on whether the dynamic image is a biological image. Also, the identification method greatly improves the false acceptance rate (FAR) and the false rejection rate (FRR) of the identification system.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the priorities of U.S. provisional patent application No. 63 / 147,582, filed on Feb. 9, 2021, Taiwanese patent application No. 110143263 filed on Nov. 19, 2021, and Taiwanese patent application No. 111102224 filed on Jan. 19, 2022, which are incorporated herewith by reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates generally to an identification system, and more particularly, to an identification method for the identification system.2. The Prior Arts[0003]The fingerprint identification technology has become the standard equipment of most smart phones since its development. The advantage of fingerprint identification is that the fingerprint is a unique feature of the human body, and the complexity of the fingerprint is sufficient for identification. In addition, when the reliability needs to be increased, it is only necessary to register more fingerprints to identify mo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06V40/13G06V40/12H04N5/235
CPCG06V40/1318H04N5/2353G06V40/1376G06V40/1335G06V10/147G06V10/803G06V40/14G06V40/1382H04N23/61H04N23/80H04N23/631H04N23/73
Inventor YIN, PING-HUNGWANG, JIA-SHYANG
Owner GUANGZHOU TYRAFOS SEMICON TECH CO LTD
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