HistogramEqualization normalized

本实验是通过直方图均衡化对图像进行增强。要求编写计算直方图程序和直方图均衡化程序，并根据实验数据解释结果图像被增强的原因。

function myhist = myimhist(ima)%绘制直方图%输入参数为ima，输出参数为myhistmyhist = zeros(256,1);imau = double(ima);[xs,ys] = size(imau);for ix = 1:xs for iy = 1:ys myhist(imau(ix,iy)+1) = myhist(imau(ix,iy)+1)+1; endendreturn;function myheqf = myhisteqf(hist)%生成直方图均衡化变换函数%输入参数为hist，输出参数为myheqfmyheqd = zeros(256,1);myhist = double(hist)/sum(hist);myheqd(1) = myhist(1);for idx = 2:256 myheqd(idx) = myheqd(idx-1) + myhist(idx);endmyheqf = round(myheqd*255);return;function proj03_02()%直方图均衡化增强WH = 2; WL = 3;ima=imread('Fig3.08(a).jpg');subplot(WH,WL,1),imshow(ima),title('原图像');myhist = myimhist(ima);subplot(WH,WL,2),bar(myhist),title('原图的直方图');myheqf = myhisteqf(myhist);subplot(WH,WL,3),plot(myheqf),title('直方图均衡化变换函数图');imeq = double(ima);[xs,ys] = size(imeq);for ix = 1:xs; for iy = 1:ys; imeq(ix,iy) = myheqf(imeq(ix,iy)+1); endendimeq = uint8(imeq);subplot(WH,WL,4),imshow(imeq),title('增强后的图');myhist = myimhist(imeq);subplot(WH,WL,5),bar(myhist),title('增强后图像的直方图');

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