hi all
I havent got experience with manipulating video in PD just sound so far, I would like to know if it is possible/how dificult it is to create a live chroma key effect within PD with the image source from a camera. And with libraries to use.
thanks!
-- enrike
On Wed, 10 May 2006, altern wrote:
I havent got experience with manipulating video in PD just sound so far, I would like to know if it is possible/how dificult it is to create a live chroma key effect within PD with the image source from a camera. And with libraries to use.
gridflow/pd_examples/color_detect.pd can do keying in any of:
R, G, B, RG, RB, GB, RGB, Y, U, V, YU, YV, UV, YUV.
the chroma key is UV, the luma key is Y.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada
in (new versions of) GEM you have pix_chroma_key - works for RGB and YUV, if you have black background you could also use alphablending. and there are also good pdp objects. marius.
altern schrieb:
hi all
I havent got experience with manipulating video in PD just sound so far, I would like to know if it is possible/how dificult it is to create a live chroma key effect within PD with the image source from a camera. And with libraries to use.
thanks!
-- enrike
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On Thu, 11 May 2006, Marius Schebella wrote:
in (new versions of) GEM you have pix_chroma_key - works for RGB and YUV, if you have black background you could also use alphablending. and there are also good pdp objects.
Make sure you use the correct ranges with [pix_chroma_key] because it's rather non-standard. It wants values from 16 to 239 in YUV, instead of from 0.0 to 1.0 in RGB. (I don't recall whether this is supposed to change in the next version of GEM)
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada
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altern -
Marius Schebella -
Mathieu Bouchard