极大值抑制与双阈值门限得到图像边缘： * nonmaxsup.m Code for performing non-maxima suppression for edge images.

Function for performing non-maxima suppression on an image

Edge detection result should be enhanced using linear method like Median filter to remove the garbage around the pupil to gain clear pupil to determine perfect centre. Get the centre of the pupil by counting the number of black pixels (zero value

CANNY算子的非极大值抑制步骤，使用插值计算，支持不同的抑制半径-Non-maxima suppression step CANNY Operators using interpolation, support different radii suppression