[REBOL] Re: convolve effect
From: petr::krenzelok::trz::cz at: 14-Nov-2001 23:02
Gregg Irwin wrote:
>RT, et al
>A while back, I made a brief attempt at writing an edge detection filter in
>REBOL but it was hideously slow so I gave up.
>I don't know how the compositing engine effects work, but would it be
>feasible to expose a generic 'convolve effect that took a 3x3 kernel so we
>could create new effects with it? That way RT wouldn't have to fill our
>requests for new compositing effects.
Well, long time ago I asked about the feature. My friend suggested me
that general native matrice operations could be used for many
computational stuff, but I am no math folk, so I don't know if it would
However - here's link Rebol is talking about upcoming effect pipeline:
taken directly from Holger's description:
- Added "func" effect. This allows you to call a REBOL function from
within the effect pipeline, manipulate the current image (including
its alpha information) and pass an image back to the effect pipeline.
Is that what you are asking for? Or do you mean operations upon image
datatype directly? Now another question popped in my mind - are Core and
Command users left behind? What do I mean? Core and Command both know
image datatype. But they don't know of face composition. How can we work
with images using Core and Command? Hmm, shouldn't datatype manipulation
functionalities be part of the kernel of the system?
PS: just don't tell me to use View ;-)