Small-area fingerprint image mosaic method, device, equipment and storage medium
A fingerprint image, small-area technology, applied in graphic image conversion, image data processing, acquisition/organization of fingerprints/palmprints, etc., can solve problems such as low efficiency, many fingerprint defects, and small amount of calculation and memory storage. , to achieve the effect of improving stability, enhancing stability, enhancing and improving stability
Active Publication Date: 2020-09-29
深圳市诺赛特系统有限公司
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Problems solved by technology
This method has a relatively small amount of calculation and memory storage, and it performs well when there are enough details, but it is powerless when there are many fingerprint defects or there are no details at all;
[0005] To sum up, the existing fingerprint splicing strategy has a large amount of calculation and required memory, and the efficiency is not high.
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[0078] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0079] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.
[0080] refer to figure 1 , figure 1 It is a schematic flowchart of an embodiment of the small-area fingerprint image mosaic method of the present invention. In this embodiment, the small-area fingerprint image mosaic method includes:
[0081] Step S10: Obtain the fingerprint image to be compared, perform image preprocessing on the image, and separate the foreground area and the background area;
[0082] In the embodiment of the present invention, the fingerprint image is obtai...
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The invention relates to the field of feature comparison, and discloses a small-area fingerprint image stitching method, device, equipment and readable storage medium, which include: acquiring a fingerprint image to be compared, performing image preprocessing on the image, and separating it into a foreground area and a readable storage medium. background area; calculating the grayscale variance of the foreground area and performing image quality scoring according to the grayscale variance to obtain the quality score of the fingerprint image to be compared; extracting a preset number of feature points from the fingerprint image to be compared; based on The feature points are compared with the feature points of the reference fingerprint template, and it is judged whether the fingerprint image to be compared is similar to the reference fingerprint template; Splicing to obtain a new reference fingerprint template. According to the image quality score, the invention ensures that the feature points updated each time come from images with higher image quality, thereby gradually enhancing and improving the stability of the reference fingerprint template.
Description
technical field [0001] The invention relates to the field of image stitching, in particular to a small-area fingerprint image stitching method, device, equipment and storage medium. Background technique [0002] Fingerprint recognition technology has been widely used in mobile phones, computers, smart door locks, cabinet locks, U disks, SSDs and other scenarios that require personal identification. At the same time, considering better embedded integration design, the terminal tends to use a small-area fingerprint sensor, which leads to a smaller area of the collected fingerprint image, and correspondingly fewer effective fingerprint information, which directly affects the performance of automatic fingerprint recognition. result. At the same time, it will also result in a smaller overlapping area between different fingerprint images of the same finger. When the overlapping area between the authentication image and the template image is small, there is less common informati...
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IPC IPC(8): G06T3/40G06K9/00
CPCG06T3/4038G06V40/1347G06V40/1365
Inventor 杨密凯韩鹏飞
Owner 深圳市诺赛特系统有限公司