Matlab图像处理中运用区域二值，输出图像全黑的问题？matlab数字图像处理
Matlab图像处理中运用区域二值，输出图像全黑的问题？
原因是：operatingRegion = im2bw (operatingRegion, thresh);得的数据是0和1，所以，input (32*(i-1)+1:32*i,32*(j-1)+1:32*j)也是0和1，而imshow(input)展示的领域是[0,255],1/255近似于0，所以，全展示为黑色。我给你改下：[a,b] = size(input);for i = 1:a/32 for j = 1:b/32 operatingRegion = input (32*(i-1)+1:32*i,32*(j-1)+1:32*j); thresh = graythresh(operatingRegion); operatingRegion = im2bw (operatingRegion, thresh); input (32*(i-1)+1:32*i,32*(j-1)+1:32*j) = operatingRegion*255; endendimshow(input);按上面语句试试
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