OpenCV编写毛玻璃效果实现（需进一步提高）

#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

// color image processing Frosted-glass effect
int main() {
IplImage* src = cvLoadImage("../Test.jpg", 1);
if(src)    {
int w = src->width, h = src->height, ws = src->widthStep;
uchar* dsrc = (uchar*)src->imageData;
IplImage* dst = cvCreateImage(cvGetSize(src), src->depth, src->nChannels);
uchar* ddst = (uchar*)dst->imageData;
cvZero(dst);

// random window size, n must be odd number.
int n = 7;
int rw = n * n;
int nf = floor(n / 2.0);
IplImage* arr = cvCreateImage(cvSize(1, rw), src->depth, src->nChannels);
uchar* darr = (uchar*)arr->imageData;
IplImage* tmp = cvCreateImage(cvSize(1, 1), src->depth, src->nChannels);
uchar* dtmp = (uchar*)tmp->imageData;
int i, j, k, l, m;
for(i = nf; i < h - nf; i += n)
for(j = nf; j < w - nf; j += n)   {
for(k = -nf; k <= nf; k++)
for(m = -nf; m <= nf; m++)     {
darr[3 * l] = dsrc[(i + k) * ws + 3 * (j + m)];
darr[3 * l + 1] = dsrc[(i + k) * ws + 3 * (j + m) + 1];
darr[3 * l + 2] = dsrc[(i + k) * ws + 3 * (j + m) + 2];
l++;
}
srand((int)time(NULL));
for(k = 0; k < rw; k++)          {
m = rand() % rw;

dtmp[0] = darr[3 * m];
dtmp[1] = darr[3 * m + 1];
dtmp[2] = darr[3 * m + 2];

darr[3 * m] = darr[3 * k];
darr[3 * m + 1] = darr[3 * k + 1];
darr[3 * m + 2] = darr[3 * k + 2];
darr[3 * k] = dtmp[0];
darr[3 * k + 1] = dtmp[1];
darr[3 * k + 2] = dtmp[2];
}
l = 0;
for(k = -nf; k <= nf; k++)
for(m = -nf; m <= nf; m++)   {
ddst[(i + k) * ws + 3 * (j + m)] = darr[3 * l];
ddst[(i + k) * ws + 3 * (j + m) + 1] = darr[3 * l + 1];
ddst[(i + k) * ws + 3 * (j + m) + 2] = darr[3 * l + 2];
l++;
}
}

cvNamedWindow("src", 1);
cvShowImage("src", src);
cvNamedWindow("dst", 1);
cvShowImage("dst", dst);

cvWaitKey(0);

cvDestroyAllWindows();
cvReleaseImage(&src);
cvReleaseImage(&dst);
cvReleaseImage(&arr);
cvReleaseImage(&tmp);

return 0;
}
printf("Can't open image!/n");
return 1;
}