Methods, devices, storage media and equipment for locating the inner boundary of the iris
By performing initial localization, unfolding, gradient calculation, and binarization on the iris image, the problem of inaccurate localization of the inner boundary of the iris was solved, and accurate localization of the inner boundary of both irregular and regular irises was achieved, thus improving the accuracy of iris recognition.
CN117315760BActive Publication Date: 2026-06-30BEIJING TECHSHINO TECHNOLOGY CO LTD +1
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Patent Information
- Application Number
- CN202210690894.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-06-17
- Publication Date
- 2026-06-30
- Estimated Expiration
- 2042-06-17
AI Technical Summary
Technical Problem
In existing technologies, the localization of the inner boundary of the iris is inaccurate, especially for images with strabismus or shallow iris texture, resulting in poor iris recognition accuracy.
Method used
The method of iris inner boundary localization first performs initial localization, then unfolds the iris image into a rectangular region image, performs gradient calculation and binarization processing to obtain boundary points, and returns them to the original iris image through coordinate transformation to achieve precise localization.
Benefits of technology
It improves the accuracy of iris recognition, enabling accurate localization of the inner boundary of both irregular and regular circular irises, thus enhancing the precision of iris recognition.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention discloses a method, apparatus, storage medium, and device for iris inner boundary localization, belonging to the field of iris recognition. The invention first performs initial localization of the iris inner boundary as a circle. Then, the annular region image containing the initially located iris inner boundary is unfolded into a rectangular region image. Next, gradient calculations are performed along the column directions of the rectangular region image, followed by binarization. The boundary points of the iris inner boundary are determined on the resulting binarized image. Finally, the boundary points are returned to the iris image to obtain the precisely located iris inner boundary. This invention is a universal method for iris inner boundary localization, capable of locating both irregular and regular circular iris inner boundaries, while ensuring accuracy and improving the accuracy of iris recognition.
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