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Hi ! In error already writen the answer - " Can not get new positive sample " How you can read in the docs opencv_traincascade arguments numPos and numNeg is number of positive/negative samples used in training for every classifier stage. So if you have 437 positive samples put as numPos argument 437 / numStages

Hi ! In error already writen the answer - " Can not get new positive sample " How you can read in the docs opencv_traincascade arguments numPos and numNeg is number of positive/negative samples used in training for every classifier stage. So if you have 437 positive samples put as numPos argument 437 / numStages numStages.