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sanwen211314
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f=imread('buiding_blur.jpg'); if size(f,3) == 3 f_gray = rgb2gray(f); else f_gray = f; end f_gray=double(f_gray); kx = [-1 1; 0 0]; ky = [-1 0; 1 0]; f_grad_x=conv2(f_gray,kx,'valid');%ˮƽ·½ÏòÌÝ¶È f_grad_y=conv2(f_gray,ky,'valid');%´¹Ö±·½ÏòÌÝ¶È % g=sqrt(f_grad_x.^2+f_grad_y.^2); Ix=f_grad_x; Value=unique(Ix( );Count=[hist(Ix( ,Value)]';s=sum(Count( );count1=log2(Count/s);%length(Ix)); figure,plot(Value,count1); axis([-200 200 -18 0]); % % title('Heavy-tailed distribution on image gradients'); % % xlabel('Gradient'); % % ylabel('Log2 probability density'); % % grid on % hold on % % f_blur_x=conv2(f_blur,kx,'valid');%ˮƽ·½ÏòÌÝ¶È % f_blur_y=conv2(f_blur,ky,'valid');%´¹Ö±·½ÏòÌÝ¶È % % g=sqrt(f_grad_x.^2+f_grad_y.^2); % % Ix=f_blur_x; % Value=unique(Ix( );% Count=[hist(Ix( ,Value)]';% s=sum(Count( );% count1=log2(Count/s);%length(Ix)); % plot(Value,count1,'r-'); % axis([-200 200 -18 0]); % title('Heavy-tailed distribution on image gradients'); % xlabel('Gradient'); % ylabel('Log2 probability density'); % grid on % Ix=f_grad_x; % Value=unique(Ix( );% Count=[hist(Ix( ,Value)]';% count1=log2(Count/length(f_grad_x)); % figure,plot(Value,count1); % axis([-150 150 -18 10]); % title('ˮƽ·½ÏòÌݶȸÅÂÊ·Ö²¼Í¼'); % % Iy=f_grad_y; % Value=unique(Iy( );% Count=[hist(Iy( ,Value)]';% count1=log2(Count/length(f_grad_y)); % figure,plot(Value,count1); % axis([-150 150 -18 10]); % title('´¹Ö±·½ÏòÌݶȸÅÂÊ·Ö²¼Í¼'); ×Ô¼ºÌå»á°É£¬¿Ï¶¨ÄÜÓ㬸ÄÒ»ÏÂͼƬ |

10Â¥2015-09-12 16:35:56
csgt0
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2Â¥2012-08-20 16:24:23
iqv520
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3Â¥2012-08-20 17:12:07
iqv520
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4Â¥2012-08-20 17:14:41













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