matlab對圖像加入噪聲的方法

隨機噪聲：

>> snoise = 0.25*randn(size(original));

>> j = imadd(original,im2uint8(snoise));
>> imshow(j);

>> imwrite(j,'H:\randNoise0.25.jpg','JPG');         %imwrite可以確保保存的圖片周圍沒有save as的白色區域

椒鹽噪聲：

>> j = imnoise(original,'salt & pepper',0.01);

高斯噪聲：

>> j = imnoise(original,'gaussian',0,0.01);