[PD] video analysis II

Tom Schouten doelie at zzz.kotnet.org
Mon Mar 24 01:32:33 CET 2003


>  pdp has no analysis objects as such, but yves' pidip extention
>  has a couple:
>    pdp_ctrack     colour tracker, outputs the coordinates of a
>                   colour(+luminosity) in a video stream..
>    pdp_mgrid      outputs cell coordinates of a grid where motion
>                   is detected..
>

just a hint:

there is a "workaround" to analyze pictures by using pdp_scanxy~
this object works like tabplay~, but it scans the luminocity channel of a
video frame, instead of an array. it accepts coordinates as signal input.
(0,0) is top left and (1,1) is bottom right. you could use a phasor~
object to generate coordinates.

if you use the audio output of pdp_scanxy~ in combination with env~ and
some lop~ and hip~ objects, you can construct some very basic motion
(hip) and intensity (lop) detection objects.

tom





More information about the Pd-list mailing list