Re: Edge-detection on results of pfDraw

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Rémi Arnaud (remi++at++remi.asd.sgi.com)
Fri, 17 Jan 1997 11:35:07 -0800 (PST)

chris++at++mpik-tueb.mpg.de wrote:
>
>
> Does anyone have experience of carrying out simple image processing
> on the results of pfDraw. In particular i'd like to perform thresholding,
> convolution and edge detection on what's being sent to the framebuffer
> by a given channel.
> Thanks
> Chris

 the result of a pfFrame is available in the Frame Buffer. You can, for example,
 read it back using glReadPixels() right after the call to pfFrame.

 You can use the localPostDraw(channel, data) function of perfly.c to do this.

 Best Regards

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