No matching function for cv::merge











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1
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I want to merge 3 monochrome camera image in one 3 channeled opencv matrix. I try this in the following way:



    cv::Mat merged;
std::vector<cv::Mat> channels[3];

while(1){
channels[0]=Camera1->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[1]=Camera2->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[2]=Camera3->getNextFrameSWTrig();

cv::merge(channels, merged);

(*buffer).push_back(merged.clone());

}


But the following error message comes:




no matching function for call to 'merge'




Altough in the OpenCV documentation I found:




C++: void merge(InputArrayOfArrays mv, OutputArray dst)











share|improve this question






















  • Have you included <opencv2/imgproc.hpp> ?
    – sgarizvi
    Nov 8 at 11:19






  • 3




    Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
    – Miki
    Nov 8 at 11:21












  • @Miki this resolved the problem! Thank you!
    – Dániel Terbe
    Nov 8 at 11:46










  • Glad it helped, posted as an answer then ;)
    – Miki
    Nov 8 at 11:48















up vote
1
down vote

favorite












I want to merge 3 monochrome camera image in one 3 channeled opencv matrix. I try this in the following way:



    cv::Mat merged;
std::vector<cv::Mat> channels[3];

while(1){
channels[0]=Camera1->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[1]=Camera2->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[2]=Camera3->getNextFrameSWTrig();

cv::merge(channels, merged);

(*buffer).push_back(merged.clone());

}


But the following error message comes:




no matching function for call to 'merge'




Altough in the OpenCV documentation I found:




C++: void merge(InputArrayOfArrays mv, OutputArray dst)











share|improve this question






















  • Have you included <opencv2/imgproc.hpp> ?
    – sgarizvi
    Nov 8 at 11:19






  • 3




    Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
    – Miki
    Nov 8 at 11:21












  • @Miki this resolved the problem! Thank you!
    – Dániel Terbe
    Nov 8 at 11:46










  • Glad it helped, posted as an answer then ;)
    – Miki
    Nov 8 at 11:48













up vote
1
down vote

favorite









up vote
1
down vote

favorite











I want to merge 3 monochrome camera image in one 3 channeled opencv matrix. I try this in the following way:



    cv::Mat merged;
std::vector<cv::Mat> channels[3];

while(1){
channels[0]=Camera1->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[1]=Camera2->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[2]=Camera3->getNextFrameSWTrig();

cv::merge(channels, merged);

(*buffer).push_back(merged.clone());

}


But the following error message comes:




no matching function for call to 'merge'




Altough in the OpenCV documentation I found:




C++: void merge(InputArrayOfArrays mv, OutputArray dst)











share|improve this question













I want to merge 3 monochrome camera image in one 3 channeled opencv matrix. I try this in the following way:



    cv::Mat merged;
std::vector<cv::Mat> channels[3];

while(1){
channels[0]=Camera1->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[1]=Camera2->getNextFrameSWTrig(); //give back frame_time and frame_num
channels[2]=Camera3->getNextFrameSWTrig();

cv::merge(channels, merged);

(*buffer).push_back(merged.clone());

}


But the following error message comes:




no matching function for call to 'merge'




Altough in the OpenCV documentation I found:




C++: void merge(InputArrayOfArrays mv, OutputArray dst)








c++ opencv image-processing






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 8 at 11:16









Dániel Terbe

557




557












  • Have you included <opencv2/imgproc.hpp> ?
    – sgarizvi
    Nov 8 at 11:19






  • 3




    Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
    – Miki
    Nov 8 at 11:21












  • @Miki this resolved the problem! Thank you!
    – Dániel Terbe
    Nov 8 at 11:46










  • Glad it helped, posted as an answer then ;)
    – Miki
    Nov 8 at 11:48


















  • Have you included <opencv2/imgproc.hpp> ?
    – sgarizvi
    Nov 8 at 11:19






  • 3




    Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
    – Miki
    Nov 8 at 11:21












  • @Miki this resolved the problem! Thank you!
    – Dániel Terbe
    Nov 8 at 11:46










  • Glad it helped, posted as an answer then ;)
    – Miki
    Nov 8 at 11:48
















Have you included <opencv2/imgproc.hpp> ?
– sgarizvi
Nov 8 at 11:19




Have you included <opencv2/imgproc.hpp> ?
– sgarizvi
Nov 8 at 11:19




3




3




Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
– Miki
Nov 8 at 11:21






Also std::vector<cv::Mat> channels[3]; should be std::vector<cv::Mat> channels(3); You want a vector with 3 elements, not 3 vectors
– Miki
Nov 8 at 11:21














@Miki this resolved the problem! Thank you!
– Dániel Terbe
Nov 8 at 11:46




@Miki this resolved the problem! Thank you!
– Dániel Terbe
Nov 8 at 11:46












Glad it helped, posted as an answer then ;)
– Miki
Nov 8 at 11:48




Glad it helped, posted as an answer then ;)
– Miki
Nov 8 at 11:48












1 Answer
1






active

oldest

votes

















up vote
3
down vote



accepted










With



std::vector<cv::Mat> channels[3];
^ ^


you're creating an array of 3 std::vector, while you want a std::vector with 3 elements:



std::vector<cv::Mat> channels(3);
^ ^





share|improve this answer



















  • 1




    you're creating an array of vectors, same as int a[3]; is an array of 3 integers
    – Miki
    Nov 8 at 11:53










  • Aha, thanks for clarifying.
    – not an alien
    Nov 8 at 11:53











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
3
down vote



accepted










With



std::vector<cv::Mat> channels[3];
^ ^


you're creating an array of 3 std::vector, while you want a std::vector with 3 elements:



std::vector<cv::Mat> channels(3);
^ ^





share|improve this answer



















  • 1




    you're creating an array of vectors, same as int a[3]; is an array of 3 integers
    – Miki
    Nov 8 at 11:53










  • Aha, thanks for clarifying.
    – not an alien
    Nov 8 at 11:53















up vote
3
down vote



accepted










With



std::vector<cv::Mat> channels[3];
^ ^


you're creating an array of 3 std::vector, while you want a std::vector with 3 elements:



std::vector<cv::Mat> channels(3);
^ ^





share|improve this answer



















  • 1




    you're creating an array of vectors, same as int a[3]; is an array of 3 integers
    – Miki
    Nov 8 at 11:53










  • Aha, thanks for clarifying.
    – not an alien
    Nov 8 at 11:53













up vote
3
down vote



accepted







up vote
3
down vote



accepted






With



std::vector<cv::Mat> channels[3];
^ ^


you're creating an array of 3 std::vector, while you want a std::vector with 3 elements:



std::vector<cv::Mat> channels(3);
^ ^





share|improve this answer














With



std::vector<cv::Mat> channels[3];
^ ^


you're creating an array of 3 std::vector, while you want a std::vector with 3 elements:



std::vector<cv::Mat> channels(3);
^ ^






share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 8 at 11:53

























answered Nov 8 at 11:48









Miki

29k851131




29k851131








  • 1




    you're creating an array of vectors, same as int a[3]; is an array of 3 integers
    – Miki
    Nov 8 at 11:53










  • Aha, thanks for clarifying.
    – not an alien
    Nov 8 at 11:53














  • 1




    you're creating an array of vectors, same as int a[3]; is an array of 3 integers
    – Miki
    Nov 8 at 11:53










  • Aha, thanks for clarifying.
    – not an alien
    Nov 8 at 11:53








1




1




you're creating an array of vectors, same as int a[3]; is an array of 3 integers
– Miki
Nov 8 at 11:53




you're creating an array of vectors, same as int a[3]; is an array of 3 integers
– Miki
Nov 8 at 11:53












Aha, thanks for clarifying.
– not an alien
Nov 8 at 11:53




Aha, thanks for clarifying.
– not an alien
Nov 8 at 11:53


















 

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