[PD] mean color value of a video grid

[vincent rioux]

Mathieu Bouchard a écrit :
> On Thu, 24 Aug 2006, vincent rioux wrote:
>
>> pix_video (to read a stream from a webcam e.g.)
>> 8 pix_crop (to divide the image)
>> pix_snap to take a snapshot as a picture.
>> pix_mean_color to compute the mean value.
>
> if for example you want to reduce 240x320 camera input to 2x4 output,
>
> [metro 40]
>  |
> [#camera]
>  |
> [#downscale_by (120 80) smoothly]
>  |
> that's all.
hello Mathieu,
thanks, i will try it (probably with puredyne).
>
> but i might not understand what you want to do: what do you really 
> need pix_snap for?
well, that was a mistake indeed.
>
>> Moreover would it be possible to compute these values on a more 
>> complex shape than a rectangle?
>
> This can mean several different things, so you should say what you 
> mean here, in detail.
i was refering to a possibly non-rectangular shape. i am not used to 
gridflow but i would guess that it is possible to take the mean color 
over a group of pixels.

v