On Sep 5, 2009, at 5:07 PM, spencerg wrote:
What software exists for digitizing video to quantify the motion
of specific features in the image? I might be willing to use
something that's NOT in R, though I'd prefer something in R (or at
least with an R intereface).
A few options that I can think of (2 non-R, 1 R):
- If you have access to Matlab, Ty Hedrick (UNC Chapel Hill) has a
good digitizing program that can handle 3d digitizing with DLT (but
works fine for 2D), automatic point tracking, reads/writes csv.
http://www.unc.edu/~thedrick/software1.html
- James Rholf's tpsDig (Windows only; http://life.bio.sunysb.edu/ee/rohlf/software.html
) can be used as a general point digitizer. I think you would have to
save the videos as image sequences first and reformat the data after.
I haven't tried this, but I think it would work.
- For one-off, small digitizing projects in R, I have exported videos
to jpg sequences, loaded them with read.jpeg(), and used locator() for
digitizing. Negatives: (1) lack of flexibility, (2) very hard to go
back and fix mistakes, (3) plotting jpeg images is slow unless the
image dimensions are reduced. But it's a native R solution.
Kevin
-------------------------------------------------
Kevin M. Middleton
Department of Biology
California State University San Bernardino
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