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2015-04-16 11:19:27 -0500 answered a question how do I remove outliers from goodFeaturesToTrack?

You can try several heuristics once you get the features. Some ideas:

  1. Discard items that are too long/short. Maybe calculate the mean and standard deviation and discard features that are more than mean + 2standard deviation or less than mean - 2standard deviation.
  2. If you have a sequence, tracking vector from N to N+1 should be similar to N-1 to N.
  3. Try different feature tracking by OpenCV - FAST, SIFT, SURF etc. Each one has advantages/disadvantages based on the features you are trying to track.
2015-04-16 11:12:14 -0500 answered a question How to access GpuMat members if its vector is created?

Did you use the vector notation of accessing elements.

Suppose the vector, vec consists of 2 elements and you want to access the second GpuMat:
GpuMat g = vec[1];

I am assuming by members you mean individual element of vector.

2015-04-16 11:05:38 -0500 asked a question Efficient conversion from Mat to GpuMat


I am trying to convert Mat to GpuMat so that I can use GPU for processing.

I tried the following two ways:

GpuMat g; 
Mat m; 
1. g = GpuMat(m) -> takes around 2 ms 
2. g.upload(m)   -> takes roughly 1 ms.

I have around 10 Mat to be converted to GpuMat - the time just adds up, is there a quick and efficient way to do the conversion?