From: Tom Nakamura <imifumei@...>
Date: 2005-04-30T04:16:28+09:00
Subject: Realtime Ruby/Tk image display?

Here's what I'm trying to do:

I have a matrox frame grabber, from which I can grab a 640x480x24bit
image from, 30 times per second.

I want to make a gui where I can grab a frame, do some simple
calculations, add a rectangle or two, and blit it on to a canvas, in
real time (30 times per second). 

The grabbing part, I think I can do with the ruby-v4l; I want to know
how I can update a canvas with this relatively large image at 30 times
per second. I'm trying to use Tk's photo class, but I think since it was
designed for static images, it can't reach that level of performance. 

ideas strongly appreciated,
Tom N