Office place fingerprint identification authentication mechanism

Abstract

The invention relates to an office place authentication mechanism, which comprises data scanning equipment and grade identification equipment, wherein the data scanning equipment is arranged at the entrance of an office place and comprises a pressing glass plate, a backlight source and a data scanning head, the backlight source is set behind the pressing glass plate, the data scanning head is setbehind the pressing glass plate, the data scanning head is used for performing image scanning on a fingerprint on the pressing glass plate so as to obtain a glass plate image, and the backlight sourceprovides backlight for the fingerprint image scanning of the data scanning head; and the grade identification equipment is connected with the data scanning head of the data scanning equipment, and isused for receiving the glass plate image, parsing out each fringe noise in the glass plate image, detecting the span of each fringe noise in the glass plate image and determining the fringe span grade based on the number of pixels corresponding to the span. The performance of the fingerprint identification mechanism can be improved according to the invention.

Description

technical field [0001] The invention relates to the field of fingerprint identification, in particular to an office fingerprint identification and authentication mechanism. Background technique [0002] Fingerprint scanning has two basic tasks: one needs to obtain an image of the finger, and the other needs to determine whether the fingerprint in this image matches the fingerprint in the previously scanned image. [0003] There are several methods of obtaining an image of a person's fingerprint, the most common methods being optical scanning and capacitive scanning, both of which work in completely different ways but both result in the same image. [0004] At the heart of optical scanning is a charge-coupled device (CCD), the same light sensor system used in digital still and video cameras. A CCD is nothing more than a group of photosensitive diodes, which generate electrical signals when photons are acted upon. Each photosensitive device records a pixel, a tiny dot that r...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the current technical problem of low fingerprint recognition accuracy, the present invention provides an office authentication mechanism, which introduces various customized image processing equipment to improve the accuracy of fingerprint recognition, and at the same time, resolves each stripe noise in the image , detecting the span of each streak noise in the glass plate image to determine the streak span level based on the number of pixels corresponding to the span, the span of each streak noise in the image is the span of each streak noise in the The maximum value of the number of pixels passed in each direction in the image, so that when the stripe span level does not exceed the limit, that is, when the image quality can be used for face recognition, the corresponding fingerprint recognition is performed; in the key specific mode of image filtering, based on The fitting result of the shape of each target in the image, obtain the module size of the image division, and process each divided image area with different filtering modes based on the signal-to-noise ratio, in which the Butterworth filter device is used to process the image Clearer and Gaussian low-pass filter devices have superior characteristics in processing image ringing effects, and when selecting Butterworth filter devices, the filter order of the Butterworth filter action performed on the processed image area is the same as the processed image The signal-to-noise ratio of the area is inversely proportional, thereby improving the filtering effect of the image signal and avoiding unnecessary filtering operations

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