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2Â¥2012-04-24 19:22:29
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pc916

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3Â¥2012-04-25 21:58:11
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pc916

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4Â¥2012-04-25 22:03:35
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kenjunn

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3Â¥: Originally posted by pc916 at 2012-04-25 21:58:11:
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5Â¥2012-04-26 03:11:17
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flybird_fish

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6Â¥2012-04-26 09:40:02
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kenjunn

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6Â¥: Originally posted by flybird_fish at 2012-04-26 09:40:02:
ÊDzâͼÏñ»ûÐαäÐεij̶Èô£¿

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7Â¥2012-04-26 10:33:24
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kenjunn

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ÎÒ°ÑÓÃmatlab¼ÆËãÐý¶ÈµÄ´úÂëÌù³öÀ´£¬´ó¼Ò°ïæ¿´¿´£¬¶ÔÕâ¸öÖ÷ÌâÓÐûÓаïÖú

I = imread('a.jpg');
[rows cols dim]=size(I);

%sobel operator used to calculate gradient image
Grd=[ -1 -2 -1;
0 0 0;
1 2 1];

Emean=zeros(rows,cols);
for i=1:dim
Ev(:,:,i)=conv2(x(:,:,i),Grd,'same');
Eh(:,:,i)=conv2(x(:,:,i),Grd.','same');
E(:,:,i)=abs(Eh(:,:,i))+abs(Ev(:,:,i));

% E(:,:,i)=conv2(X(:,:,i),Grd1,'same');
end
Emean=1/dim*sum(E,3); %finds average gradient image

%count the "curl"


Ecurl = zeros(rows, cols);%creat a 0 rows * cols matrix

for i = 1:dim

Ecurl(:,:,i) = conv2(Iy(:,:,i), Grd.', 'same') - conv2(Ix(:,:,i), Grd, 'same');

end

theCurl = 1/dim*sum(Ecurl,3);
8Â¥2012-04-26 10:49:19
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