屏幕缺陷检测背景纹理拟合，用于LED mura缺陷检测(for p=1:1 [X,Y,Z]=random_point(img,0.5); C=coeffi(X,Y,Z); background=form(img,C); IMG=im2double(img); defect=IMG-background; img=defect; end defect=abs(defect); figure(2),imshow(img,[]),title('');)