matlab 彩色图像处理

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读入一幅彩色图像，进行如下图像处理：

(1) 在RGB彩色空间中对图像进行模糊和锐化处理

rgb= imread('flower.jpg');figure;  imshow(rgb); title('原图');

 %平滑滤波  r=rgb(:,:,1);  g=rgb(:,:,2);  b=rgb(:,:,3); m=fspecial('average',[8,8]);  r_filtered=imfilter(r,m); g_filtered=imfilter(g,m);  b_filtered=imfilter(b,m);   rgb_filtered=cat(3,r_filtered,g_filtered,b_filtered);  figure;  imshow(rgb_filtered);  title('模糊后');imwrite(rgb_filtered, 'RGB彩色空间模糊后.jpg');

彩色空间模糊后

%拉普拉斯lapMatrix=[1 1 1;1 -8 1;1 1 1];      i_tmp=imfilter(rgb,lapMatrix,'replicate');  i_sharped=imsubtract(rgb,i_tmp);  figure;   imshow(i_sharped); title('锐化后');imwrite(i_sharped, 'RGB彩色空间锐化后.jpg');

RGB彩色空间锐化后

(2) 在HSI彩色空间中，对H分量图像进行模糊和锐化处理，转换回RGB格式并观察效果

(3) 在HSI彩色空间中，对S分量图像进行模糊和锐化处理，转换回RGB格式并观察效果

(4) 在HSI彩色空间中，对I分量图像进行模糊和锐化处理，转换回RGB格式并观察效果

fc = imread('flower.jpg');h = rgb2hsi(fc);H = h (:,:,1);S = h (:,:,2);I = h (:,:,3);subplot(3,3,1);imshow(fc);  title('原图');

原图

%平滑滤波 m=fspecial('average',[8,8]); h_filtered=imfilter(H,m);img_h_filtered = cat(3,h_filtered,S,I); rgb_h_filtered = hsi2rgb(img_h_filtered);subplot(3,3,2);imshow(rgb_h_filtered);  title('H分量模糊后');imwrite(rgb_h_filtered, 'H分量模糊后.jpg');

H分量模糊后

%拉普拉斯lapMatrix=[1 1 1;1 -8 1;1 1 1];    i_tmp=imfilter(H,lapMatrix,'replicate'); H_sharped=imsubtract(H,i_tmp); img_h_sharped = cat(3,H_sharped,S,I); rgb_h_sharped = hsi2rgb(img_h_sharped);subplot(3,3,3); imshow(rgb_h_sharped); title('H分量锐化后');imwrite(rgb_h_sharped, 'H分量锐化后.jpg');

H分量锐化后

subplot(3,3,4);imshow(fc);  title('原图');%平滑滤波 m=fspecial('average',[8,8]); s_filtered=imfilter(S,m);img_s_filtered = cat(3,H,s_filtered,I); rgb_s_filtered = hsi2rgb(img_s_filtered);subplot(3,3,5);imshow(rgb_s_filtered);  title('S分量模糊后');imwrite(rgb_s_filtered, 'S分量模糊后.jpg');

S分量模糊后

%拉普拉斯lapMatrix=[1 1 1;1 -8 1;1 1 1];    i_tmp=imfilter(S,lapMatrix,'replicate'); s_sharped=imsubtract(S,i_tmp); img_s_sharped = cat(3,H,s_sharped,I); rgb_s_sharped = hsi2rgb(img_s_sharped);subplot(3,3,6); imshow(rgb_s_sharped); title('S分量锐化后');imwrite(rgb_s_sharped, 'S分量锐化后.jpg');

S分量锐化后

subplot(3,3,7);imshow(fc);  title('原图');%平滑滤波 m=fspecial('average',[8,8]); i_filtered=imfilter(I,m);img_i_filtered = cat(3,H,S,i_filtered); rgb_i_filtered = hsi2rgb(img_i_filtered);subplot(3,3,8);imshow(rgb_i_filtered);  title('I分量模糊后');imwrite(rgb_i_filtered, 'I分量模糊后.jpg');

I分量模糊后

%拉普拉斯lapMatrix=[1 1 1;1 -8 1;1 1 1];    i_tmp=imfilter(I,lapMatrix,'replicate'); i_sharped=imsubtract(I,i_tmp); img_i_sharped = cat(3,H,S,i_sharped); rgb_i_sharped = hsi2rgb(img_i_sharped);subplot(3,3,9); imshow(rgb_i_sharped); title('I分量锐化后');imwrite(rgb_i_sharped, 'I分量锐化后.jpg');

I分量锐化后