Research on detecting algorithm of pupil'eigenvalues in medical eye image
Yonglin Zhang · Jisuanji gongcheng yu sheji · 2010
In order to detect the eyes for medical needs,an algorithm is proposed to detect the pupil eigenvalues using mathematical morphology operations based on pupil geometry and gray feature.Firstly,according to the gray scale features of the pupil,the rough center of the pupil is determined with gray projection method.Based on the rough center,the sub-image that contains the pupil is intercepted with a rectangular window.Then under the geometrical characteristics of the pupil that approximats circle,remove spots by reconstruction with disc-shaped structural elements.Further eliminate the interference of eyelash by the morphological operation.Finally, the eigenvalues of the pupil are obtained detecting the pupil boundary points by edge extraction and circle hough transform.The results show that the algorithmcan effectively detect the eigenvalues of the pupil,and the detection accuracy and speed meet the needs ofmedical eye image detection.