类matlab find函数
逻辑矩阵，找出元素1并记录其位置索引。
1 int main(int argc, char** argv) 2 { 3 unsigned char acSrc[4][4] = 4 { 5 0, 1, 1, 0, 6 1, 0, 0, 1, 7 1, 0, 1, 1, 8 1, 1, 0, 0, 9 }; 10 printf("acSrc-data address:%p\n", acSrc); 11 12 Mat src(4, 4, CV_8UC1, acSrc); 13 printf("src-data address:%p\n", src.data); 14 15 cout << src << endl; 16 17 vector<int> vec_row; 18 vector<int> vec_col; 19 20 for (int j = 0; j < src.cols; ++j) 21 { 22 for (int i = 0; i < src.rows; ++i) 23 { 24 if (1 == src.at<unsigned char>(i, j)) 25 { 26 vec_row.push_back(i); 27 vec_col.push_back(j); 28 } 29 //cout << src.at<int>(i, j) << endl; 30 } 31 } 32 33 cout << "vec_row.size:" << vec_row.size() << endl; 34 cout << "vec_col.size:" << vec_col.size() << endl; 35 36 vector<int>::iterator iter_row = vec_row.begin(); 37 vector<int>::iterator iter_col = vec_col.begin(); 38 39 Mat m = Mat::zeros(4, 4, CV_8UC1); 40 cout << m << endl; 41 42 for (; (iter_row != vec_row.end()) && (iter_col != vec_col.end()); ++iter_row, ++iter_col) 43 { 44 cout << *iter_row << ", " << *iter_col << endl; 45 46 m.at<uchar>(*iter_row, *iter_col) = 1; 47 } 48 49 cout << m << endl; 50 51 return 0; 52 }
