Office fingerprint identification and authentication agency

Abstract

The present invention relates to an office site authentication mechanism, comprising: a data scanning device arranged at the entrance of the office site, including a pressing glass plate, a backlight light source and a data scanning head, and the backlight light source is set behind the pressing glass plate , the data scanning head is arranged behind the pressing glass plate, and the data scanning head is used to scan the fingerprint on the pressing glass plate to obtain an image of the glass plate, and the backlight source is the data The fingerprint image scanning of the scanning head provides a backlight; the grade identification device is connected with the data scanning head of the data scanning device, and is used to receive the glass plate image, resolve each stripe noise in the glass plate image, and detect each A span of streak noise in the glass plate image, to determine a streak span level based on the number of pixels corresponding to the span. By means of the present invention, the performance of the fingerprinting mechanism can be improved.

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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