Re: VIGRA - Image processing for boost

From: brianjparker_at_[hidden]
Date: 2001-11-15 15:59:40

--- In boost_at_y..., "Peter Dimov" <pdimov_at_m...> wrote:
> From: "Ullrich Koethe" <u.koethe_at_c...>
> > BTW, what's your image library doing? Is it also public?
> 
> To reply to the specific question:
> 
> Currently I focus on operations relevant to computer games. These 
include
> 
> * import/export (you've got this covered)
> 
> * resampling
> 
> * copy (as fast as possible) image A onto image B at point (x, y) 
using
> effect E (additive blend, alpha blend, multiplicative blend... like 
the
> photoshop layer effects)
> 
> * (quickly) convert image A to the specified packed-pixel format, 
like 555
> RGB.
> 
> * crop image A leaving only the parts where the alpha channel is 
not zero.

Hi,

As a game developer, I presume you are targeting x86 platforms.

If so then you can't really go past the (free, but not open source) 
Intel Performance Primitives library-
http://www.intel.com/software/products/perflib/

More generally, I think that such low-level image processing 
operations are best handled by such a set of optimised standard 
functions (much like the BLAS is used for linear-algebraic 
primitives) rather than duplicating this code for each array class. 
The IPP has an excellent low-level design and so would be an ideal 
candidate for such a standard low-level library, IMHO. Various array 
classes, (VIGRA, valarray etc.) can then have wrappers written to 
provide convenient access to this functional interface.

Another excellent site for more advanced machine vision algorithms is 
the (open-source) OpenCV library at 
http://www.intel.com/research/mrl/research/opencv/. 

,Brian Parker
Senior Research Engineer,
Canon Information Systems Research, Australia

PhD student, 
Biomedical & Multimedia Information Technology (BMIT) Group,
Computer Science Department, Sydney University, Australia

(brianjparker_at_[hidden])