How the sampling time is choosen by calcOpticalFlowPyrLK??

asked 2015-06-29 10:41:27 -0600

kong gravatar image

updated 2015-06-29 11:01:20 -0600

  1. In the lucas kanade theory of optical flow measurement, instentanious velocity (vx,vy) of a point in an image is calculated at time t, given that the intensity will be same at time t+dt. But in calcOpticalFlowPyrLK, provide the new postion of the given input point at t+dt. So if they are using Euler method then how they select dt.

Or how they are calculating the position.

  1. What is the requirement to give input "nextImg" to the function calcOpticalFlowPyrLK() ??
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Not sure but (Lucas–Kanade method) I think that Ix and Iy are the spatial derivatives across the first image and It is the derivative between the next and the current image.

Eduardo gravatar imageEduardo ( 2015-06-29 12:01:47 -0600 )edit