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计算将灰度图像转化为二值图像所需的门限BWim2bwI1threshold将灰度图像转化为二值图像figureimshowBWtitle二值图像dimsizeBWcolrou
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13直方图阈值法用MATLAB实现直方图阈值法:Iimreadxia
bmpI1rgb2grayIfiguresubplot221imshowI1title灰度图像axis5025050200grido
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sizeI1测量图像尺寸参数GPzeros1256预创建存放灰度出现概率的向量fork0255GPk1le
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fsubplot223imshowI2title阈值150的分割图像axis5025050200grido
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显示坐标系I3im2bwI200255subplot224imshowI3title阈值200的分割图像axis5025050200grido
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显示坐标系14自动阈值法:Otsu法用MATLAB实现Otsu算法:clcclearallIimreadxia
bmpsubplot121imshowItitle原始图像axis5025050200grido
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显示坐标系levelgraythreshI确定灰度阈值BWim2bwIlevelsubplot122imshowBWtitleOtsu法阈值分割图像axis5025050200grido
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显示坐标系15膨胀操作Iimreadxia
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