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2012-08-16 22:21:39 -0500 asked a question How to control Dense SIFT
Ptr<FeatureDetector> detector = FeatureDetector::create("Dense");

I want to control how to detect features, such as step. How can I do it before calling detect instructions.

It's best to use factory method, because I want to change different feature detector conveniently.

detector->detect(image, keypoints);