Re: Bayer Pattern images in Pixbuf or Pixmaps

[Tor Lillqvist <tml iki fi>]

Stefan Kost writes:
> it would be helpful if you tell us what the heck a 'bayer pattern' is ...

See for instance http://www.cambridgeincolour.com/tutorials/sensors.htm .

That was the first Google hit when searching the words "bayer array"
(without the quotes).

> > I was wondering if Pixmaps or Pixbufs support Bayer Pattern 

Nope. That would be way too application domain specific for GTK+.

> > if there is a simple conversion technique to get a Bayer
> > Pattern image into an RGB or other image format that could be used
> > properly by a Pixbuf or Pixmap.

You mean a simple demosaicing (debayering) technique? Well, a trivial
one like "nearest neighbour" for the missing colour channels of each
pixel is probably "simple", but it isn't good qualitywise.

High-quality demosaicing algorithms are not simple. See for instance
http://www.cs.pdx.edu/~cklin/demosaic/ .

The Open Source dcraw program
(http://www.cybercom.net/~dcoffin/dcraw/) uses an algorithm called
"Interpolation using a Threshold-based variable number of gradients"
described in http://www-ise.stanford.edu/~tingchen/algodep/vargra.html

--tml