## Image Derivate for Time..

Moderator: Computer Vision

tanne
Endlosschleifenbastler
Beiträge: 162
Registriert: 30. Sep 2008 16:05

### Image Derivate for Time..

how do i calculate the derivate for the time from an image? i.e. the I_t of lucas-kanade.. i'm kinda stuck. :/

qgao
Moderator
Beiträge: 33
Registriert: 7. Apr 2009 11:38

### Re: Image Derivate for Time..

tanne hat geschrieben:how do i calculate the derivate for the time from an image? i.e. the I_t of lucas-kanade.. i'm kinda stuck. :/
$$I_t \approx I(t+1) - I(t)$$

robert.n
Nerd
Beiträge: 673
Registriert: 29. Sep 2008 19:17

### Re: Image Derivate for Time..

What is $$f_t$$ in the formula in task 2? How to calculate it?

$$f_x$$ is the first frame's x-derivative, right? (In this case: frame7's x-derivative.)

//EDIT:
$$f_t = frame7 - frame8$$