Histogram-Equalization.zip_matlab直方图_matlb直方图_直方图_直方图 均衡

function project_b(I) [height,width]=size(I); %测量图像尺寸参数 p=zeros(1,256); %预创建存放灰度出现概率的向量 %进行像素灰度统计 for i=1:height for j=1:width %统计个灰度节像素个数，共256个灰度级 p(I(i,j) + 1) = p(I(i,j) + 1) + 1; %对应灰度值像素点数量增加一 end end s=zeros(1,256); s(1)=p(1); for i=2:256 s(i)=p(i) + s(i-1); %统计图像中每个灰度级像素的累积个数，s(i):0,1,```,i-1 end for i=1:256 s(i) = s(i)*256/(width*height); %求灰度映射函数，计算灰度分布密度 if s(i) > 256 s(i) = 256; end end %图像均衡化 I_equal = I; for i=1:height for j=1:width I_equal(i,j) = s( I(i,j) + 1); end end project_a(I_equal);