[PD] Gem: resizing a pix smaller

IOhannes m zmoelnig zmoelnig at iem.at
Thu Apr 14 19:04:27 CEST 2005

Martin Dupras wrote:
> I need to take the output of pix_video and reduce the resolution 
> considerably, to something like 16 x 12. Can anyone suggest a reasonable 
> way to do that?

this has been on my todo-list for ages ;-(

> While on the subject, does anyone have good pointers to doing something 
> in the general ballpark of track-them-colors (Director) or Cyclops (Max)?

i have no idea what they do, but from the director-name, i guess it has 
something to do with color.

[pix_blob] (0.90), [pix_multiblob] (CVS) do blob-tracking based on the 
color-planes (well, this is true for [pix_blob]; [pix_multiblob] only 
considers the luminance)
so you'll have to transform the color-to-track-information to be 
directly accessible via linear combination ([pix_blob]) of the 
color-planes (or via the luminance-plane with [pix_multiblob])
i use [pix_rgb2hsv] for this, but this surely eats a considerable amount 
  of your cpu...


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