If you are happy with other solutions, try looking at
ImageJ and its predecessor, NIH-Image, from
http://rsb.info.nih.gov/ij/. They are public domain
image processing so the full source code is available.
Problems of particle detection/analysis/tracking etc.
have been worked on in these programmes for 15+ years
- so there are good solutions out there.
Incidentally, pixel access in ImageJ is very fast
indeed. Way faster than with RGBsurface and all the
optimisation tricks. I don't know why it's so much
faster.
If you want to code this yourself - then ignore this!
But there are solutions off-the-shelf if you want.
Gary.
>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.
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