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this is an INTEGER Mat:

cv::Mat labels(100, 1, CV_32SC1);

but you access it as FLOAT:

labels.at<float>(i)

so, either use float or integer types consistently, and it'll work ;)

this is an INTEGER Mat:

cv::Mat labels(100, 1, CV_32SC1);

but you access it as FLOAT:

labels.at<float>(i)

so, either use float or integer types consistently, and it'll work ;)