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meijuanwx

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I=imread('eight.tif');
imshow(I) ;

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figure,imshow  (J1);

J2=imnoise(I,'salt & pepper',0.04); % µþ¼ÓÃܶÈΪ0.04µÄ½·ÑÎÔëÉù¡£
                                          
figure,imshow(J2);
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