Opencv 8 （打印一个稀疏矩阵中的所有非0元素)

#include <stdio.h>

#include "opencv2/highgui/highgui.hpp"

#include "opencv2/imgproc/imgproc.hpp"

using namespace std;

void main()

{

int size[] = { 10,10 };

cv::SparseMat sm(2, size, CV_32F);

for (int i = 0; i < 10; i++)

{

int idx[2];

idx[0] = size[0] * rand();

idx[1] = size[1] * rand();

//Fill the array

sm.ref<float>(idx) += 1.0f;

//Print out the nonzero elements

//

}

cv::SparseMatConstIterator_<float>it = sm.begin<float>();

cv::SparseMatConstIterator_<float>it_end = sm.end<float>();

for (; it != it_end; ++it)

{

const cv::SparseMat::Node* node = it.node();

printf("(%3d,%3d)%f\n", node->idx[0], node->idx[1], *it);

}

return;

}

结果打印：