I want to find each of the "blobs" (sets of contiguous pixels). For
each blob I want to get the center of mass and number of pixels. I
actually have a method for doing this, but it seems very slow and
inefficient. As I said, I did some web searching and it seems to be a
fairly common problem, but I couldn't get sufficiently deep into it.
The overall problem is tracking a marker on an animal from frames of
a movie. As one can imagine, doing this on each frame is very time
consuming. I've thought of using frame differences, but I'm not
convinced it will buy much.
I hadn't thought of using floodfill. I can see how this would be a
fast method to paint a blob. But I don't see how I can efficiently
get information about which pixels have been painted without
painstakingly going through each pixel and looking at its color.
john kubie
On Sep 24, 2006, at 3:57 PM, Phil M wrote:
What exactly are you looking for?
If you are looking for the difference between two pictures, you
might try using a formula to convert a color photo into 1-bit, and
then XOR the difference between the two. Let me know if this is
what you mean and I will see if I can do something about it.
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