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void salt(IplImage *img, int saltNum)
{
int x,y;
int i ;
unsigned char *src = NULL;
src = (unsigned char*)img->imageData;
for(i = 0; i < saltNum; i++)
{
x = rand() % img->width;
y = rand() % img->height;
if(img->nChannels == 1)
{
src[y * img->widthStep + x] = 255;
}
else if(img->nChannels == 3)
{
src[y * img->widthStep + x * 3] = 255;
src[y * img->widthStep + x * 3 + 1] = 255;
src[y * img->widthStep + x * 3 + 2] = 255;
}
}
}
IplImage* img = cvLoadImage("E:\\bgtest.bmp", CV_LOAD_IMAGE_GRAYSCALE);
IplImage* img1 = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1);
img1 = cvCloneImage(img);
salt(img1,38000);
cvSaveImage("E:\\saltfull38000.bmp",img1);
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原文地址：http://www.cnblogs.com/faith0217/p/4981763.html
