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 | 1 | initial version |
this time, it's not opencv's fault, hehe ;)
std::vector<std::vector<cv::DMatch>> matches;
this is a 2d vector, which is wrong, it should be a single one, like this:
std::vector<cv::DMatch> matches;
(so, in your current code, matches[i] is another vector<DMatch>, not the DMatch item itself [with the required distance member] )