I am new to opencv and am trying to extract keypoints of a gesture image by ORB algorithm in python interface. The image input is binary and has many curvatures. So ORB gives too many points as keypoints (which are actually not). I am trying to increase the threshold of ORB algorithm so that the unnesessary points dont get detected. I have searched for ORB algorithms and haven't found any use of threshold except for in c++ function description. So my question is what are the input parameters for ORB detection algorithm and what is the actual syntax in python. Thanks in advance.