【二值化】Bernsen算法

Bernsen算法实现图像二值化

%局部阈值操作Bersen算法 clc clear I = imread('card8.bmp'); w = 1;%矩阵大小为2*w+1 T = 0;%阈值大小 max = 0; min = 0; [m,n] = size(I); T = zeros(m - 2*w,n - 2*w); %根据bersen算法计算每个像素点的阈值 for i = (w + 1):(m - w) for j = (w + 1):(n - w) max = uint8(I(i,j)); min = uint8(I(i,j)); for k = -w:w for l = -w:w if max < uint8(I(i + k,j + l)) max = uint8(I(i + k,j + l)); end if min > uint8(I(i + k,j + l)) min = uint8(I(i + k,j + l)); end end end T(i,j) = 0.5*(max + min); end end for i = (w + 1):(m - w) for j = (w + 1):(n - w) if I(i,j) > T(i,j) I(i,j) = uint8(255); else I(i,j) = uint8(0); end end end imshow(I);