Operator * doesn't do multiplication for two cv::Mat Objects (Bug #2498)
| Status: | Cancelled | Start date: | 2012-10-31 |
|---|---|---|---|
| Priority: | Low | Due date: | |
| Assignee: |  Alexander Shishkov |
% Done: | 0% |
| Category: | trash | ||
| Target version: | - | ||
| Affected version: | Operating System: | ||
| Difficulty: | HW Platform: | ||
| Pull request: |
Description
Operator * doesn't work for matrix multiplication.
Please see the source file attached to verify.
I will appreciate a response to why this is not working....A discussion in Stackoverflow was raised under thread no. 13119314
http://stackoverflow.com/questions/13130864/re-13119414-matrix-multiplication-using-cvmat
Kind Regards,
Associated revisions
Merge pull request #2498 from dreamworld:fix_tutorial_mat_the_basic_image_container
History
Updated by Alexander Shishkov over 12 years ago
int p[4] = {3,1,2,4};
cv::Mat testMat = cv::Mat(1,4,CV_32S,p);
std::cout << testMat << std::endl; // Doesn't show the correct result
std::cout << testMat.at<unsigned int>(3) << std::endl; // Displays 4
//cv::Mat resDot = testMat*(testMat.t());
cv::Mat testMatTransp(testMat.t());
std::cout << testMatTransp << std::endl; // Doesn't display correct result
cv::MatExpr multRes = testMat.mul(testMat);
std::cout << "dot product result = " << multRes << std::endl;
cv::Mat tMf;
testMat.convertTo(tMf, CV_32F);
std::cout << "product result = " << tMf*tMf.t() << std::endl;
std::cout << "continous blocks ? " << testMat.isContinuous() << std::endl;
>>>>> [3, 1, 2, 4] 4 [3; 1; 2; 4] dot product result = [9, 1, 4, 16] product result = [30] continous blocks ? 1
- Category set to trash
- Assignee set to Alexander Shishkov
- Priority changed from Normal to Low
- Status changed from Open to Cancelled