Motions. - Python

Dr. Pastor

Hi:
I would like to track the motions of
small birds in short (20-30sec) .avi films.
What tool-set/programs would be wise to use?
Thanks for any guidance.

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Oct 10 '06 #1

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Gerrit Holl

On 2006-10-11 00:26:38 +0200, Dr. Pastor wrote:

I would like to track the motions of
small birds in short (20-30sec) .avi films.
What tool-set/programs would be wise to use?
Thanks for any guidance.

I'd use PIL with numpy and subtract a birdless background picture
from each picture. Make that binary (choose a suitable treshhold,
100 or so) and you'll get a matrix for each frame with value 1 for the
position of the bird. Been there, done that, though my problem was
slightly easier: I had a few dozen of equal balls flying around and all
I needed was the average total position, not tracking each individually.
How to do that if birds pass each other (projecting 3D on 2D) I don't
know, but I'm sure it's been done before (not necessarily in Python
though).

Gerrit.

Oct 11 '06 #2

dug

Hi,

I think that the science discipline you will be working with is called
'computer vision' (CV). It will be worthwhile also posting your
question in a CV group.

Best wishes

Douglas

Dr. Pastor wrote:

Hi:
I would like to track the motions of
small birds in short (20-30sec) .avi films.
What tool-set/programs would be wise to use?
Thanks for any guidance.

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Oct 12 '06 #3

Dr. Pastor

Thank you Sir!

Gerrit Holl wrote:

On 2006-10-11 00:26:38 +0200, Dr. Pastor wrote:

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Oct 14 '06 #4

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