Iris recognizing preprocessing method based on grey level information
A technology of iris recognition and grayscale information, which is applied in the field of image processing and can solve problems such as low stability, interference from eyelash occlusion, and poor versatility of iris image quality evaluation methods.
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[0067] Using the method of the present invention, firstly use C language and assembly language to write the iris preprocessing program; then use CMOS or CCD camera to automatically capture the original image of the iris; then input the captured original image of the iris as source data to the DSP embedded system Processed in the iris preprocessing program; after iris positioning and image quality evaluation, the qualified iris image is positioned and then outputs a normalized iris image containing rich texture information. Using 2400 captured gray-scale iris images with different lighting conditions and different shooting postures as source data, the positioning accuracy rate is 97.5%, and it only takes 100ms to locate an image.
[0068] In summary, the method of the present invention makes full use of the gray information of the iris image, combined with the circle fitting method, so as to quickly and accurately locate the iris area from the provided iris original image and make ...
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