中文说明：应用背景功能[ sfinal，脱粒] = Canny（IMG，mlow，高，SIG）%的Canny边缘检测器 ；%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%功能 ；[ sfinal，关键技术功能DG = DGAUSS（SIG）X =地板（3×SIG）：细胞（3×SIG）；G = exp（- 0.5 * X ^ 2 /信号^ 2）；克=克/总和（克）；DG = x *克/信号^ 2；
English Description：
Application backgroundfunction [sFinal,thresh] = canny(img, mLow, mHigh, sig) % Canny edge detector %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % function [sFinal, thresh] =canny(img, mLow, mHigh, sig) % Applies the canny edge detection algo to the given image % img : the given image (matrix) in color or B/W % mLow : the threshold is set adaptively: low_threshold = mLow* mean_intensity(im_gradient) % mHigh: the threshol is set adaptively: high_threshold= mHigh*low_threshold % sig : the value of sigma for the derivative of gaussian operator % % The default values for (sig, mLow, mHigh) are (1, 0.5, 2.5) % The function displays the image and also returns: % sFinal : the final (B/W) image with edges % thresh : =[lowT