Setting the Hessian Threshold on Ptr

Question

Using this particular FeatureDetector, I can't figure out how to set the Hessian Threshold.

Ptr<FeatureDetector> detector = FeatureDetector::create("SURF");

Anyone know how?

Answer 1

Try this:

float newThresh = detector->getDouble("threshold") + 3;
detector->set("threshold", newThresh);