灰度图像增强_matlab_灰度图像增强_图像增强_

clear all; cam_h=150; cam_w=200; imag=imread('P90516-133042.jpg'); imag=rgb2gray(imag); for i=1:cam_h for j=1:cam_w imag1(i,j)=double(imag(i*20,j*20)); imag2(i,j)=uint8 (imag(i,j)); end end subplot(1,3,1) imshow(imag); tempx=0.1;tempy=0.1;temp=0.1; for i=2:cam_h-1 for j=2:cam_w-1 tempx=double((- imag1(i-1,j-1))+(-2*imag1(i ,j-1))+(- imag1(i+1,j-1))+( imag1(i-1,j+1))+( 2*imag1(i ,j+1))+( imag1(i+1,j+1))); if(tempx<0) tempx=-tempx; end tempy=double(( imag1(i+1,j-1))+( 2*imag1(i+1,j ))+( imag1(i+1,j+1))+(- imag1(i-1,j-1))+(-2*imag1(i-1,j ))+(- imag1(i-1,j+1))); if(tempy<0) tempy=-tempy; end temp=tempx+tempy; if(temp>255) temp=255; end imag2(i,j)=uint8(temp); if(imag2(i,j)>240) imag3(i,j)=255; end if(imag2(i,j)<240) imag3(i,j)=0; end end end subplot(1,3,2) imshow(imag2); subplot(1,3,3) imshow(imag3);