二维信号的卷积原理请参考另外一篇文章:http://blog.csdn.net/carson2005/article/details/43702241
这里直接给出参考代码:
- void Conv2(int** filter, int** arr, int** res, int filterW, int filterH, int arrW, int arrH)
- {
- int temp;
- for (int i=0; i<filterH+arrH-1; i++)
- {
- for (int j=0; j<filterW+arrW-1; j++)
- {
- temp = 0;
- for (int m=0; m<filterH; m++)
- {
- for (int n=0; n<filterW; n++)
- {
- if ((i-m)>=0 && (i-m)<arrH && (j-n)>=0 && (j-n)<arrW)
- {
- temp += filter[m][n]*arr[i-m][j-n];
- }
- }
- }
- res[i][j] = temp;
- }
- }
- }
- void Conv2Test()
- {
- int filterW = 3;
- int filterH = 3;
- int arrW = 5;
- int arrH = 5;
- int resW = filterW + arrW - 1;
- int resH = filterH + arrH - 1;
- int** pFilter = new int*[filterH];
- for (int i=0; i<filterH; i++)
- {
- pFilter[i] = new int[filterW];
- }
- int** arr = new int*[arrH];
- for (int i=0; i<arrH; i++)
- {
- arr[i] = new int[arrW];
- }
- int** res = new int*[resH];
- for (int i=0; i<resH; i++)
- {
- res[i] = new int[resW];
- }
- pFilter[0][0] = 1;
- pFilter[0][1] = 3;
- pFilter[0][2] = 1;
- pFilter[1][0] = 0;
- pFilter[1][1] = 5;
- pFilter[1][2] = 0;
- pFilter[2][0] = 2;
- pFilter[2][1] = 1;
- pFilter[2][2] = 2;
- arr[0][0] = 17;
- arr[0][1] = 24;
- arr[0][2] = 1;
- arr[0][3] = 8;
- arr[0][4] = 15;
- arr[1][0] = 23;
- arr[1][1] = 5;
- arr[1][2] = 7;
- arr[1][3] = 14;
- arr[1][4] = 16;
- arr[2][0] = 4;
- arr[2][1] = 6;
- arr[2][2] = 13;
- arr[2][3] = 20;
- arr[2][4] = 22;
- arr[3][0] = 10;
- arr[3][1] = 12;
- arr[3][2] = 19;
- arr[3][3] = 21;
- arr[3][4] = 3;
- arr[4][0] = 11;
- arr[4][1] = 18;
- arr[4][2] = 25;
- arr[4][3] = 2;
- arr[4][4] = 9;
- printf("pFilter: n");
- for (int i=0; i<filterH; i++)
- {
- for (int j=0; j<filterW; j++)
- {
- printf("%d ", pFilter[i][j]);
- }
- printf("n");
- }
- printf("*********************************************** n");
- printf("arr: n");
- for (int i=0; i<arrH; i++)
- {
- for (int j=0; j<arrW; j++)
- {
- printf("%d ", arr[i][j]);
- }
- printf("n");
- }
- printf("*********************************************** n");
- Conv2(pFilter, arr, res, filterW, filterH, arrW, arrH);
- printf("res: n");
- for (int i=0; i<resH; i++)
- {
- for (int j=0; j<resW; j++)
- {
- printf("%d ", res[i][j]);
- }
- printf("n");
- }
- printf("*********************************************** n");
- }
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