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Hello, i'm using OpenCV for some objectrecognition application. When i calculate KeyPoints with a method like SIFT the KeyPoints have a parameter size. In the documentation it says that this is the diameter of KeyPoint. My question is how this is calculatetd? Or is the parameter depending on the scale where a KeyPoint is found? And if yes, how?

Hello, i'm using OpenCV for some objectrecognition application. When i calculate KeyPoints with a method like SIFT the KeyPoints have a parameter size. In the documentation it says that this is the diameter of KeyPoint. My question is how this is calculatetd? calculateted? Or is the parameter depending on the scale where a KeyPoint is found? And if yes, how?