I am trying to extract features using OpenCV's HoG API, however I can't seem to find the API that allow me to do that. What I am trying to do is to extract features using HoG from all my dataset (a set number of positive and negative images), then train my own SVM. I peeked into HoG.cpp under OpenCV, and it didn't help. All the codes are buried within complexities and the need to cater for differe

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