How to combine a bunch of feature points into a blob in OpenCV?

Question

I was wondering whether it is possible to combine a bunch of feature points (detected by, lets say GoodFeaturestoTrack() ) and create a solid blob out of them?

If not, then how can I ensure detection of a solid object in an image sequence.

Answer 1

In OpenCV, you can use convexHull() to find the convex hull of a point set.

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Edit: if you simply need a bounded rectangle, in OpenCV, you can call boundingRect() instead.