How to begin ?

[Boudewijn Rempt]

On Tuesday 10 August 2004 22:56, Michael Thaler wrote:
>
> Do you have some references to useful papers about bicubic interpolation? 

Not really. I've found few books that specifically deal with 2D algorithms, 
and I must be reading the wrong journals. So what I know, I know from the 
source of the Gimp and websites like 
http://astronomy.swin.edu.au/~pbourke/colour/bicubic/. I notice that 
applications like Photoshop offer a choice between a 'fast' and a 
'best' (where best is described as bicubic) scaling, but for the life of me, 
I have never been able to discover any difference in performance, although 
the difference in quality is clear.

> I 
> am currently writing my Ph. D. phesis in theoretical physics and I should
> be able to handle the math but I no experience at all with image
> processing. But I think it would be fun to write some really good rescale
> algorithm. If someone gives me a hand, maybe I try it.

That would be very, very cool. I'm sure that there's a whole literature about 
it, most of it in Siggraph papers that any university library should have.
Qt's smoothscale is from libpnm, which surprised me a bit.

>
> How do you actually develop Krita? I know how to check out Krita from CVS
> and I know how to compile and install it. If you want to change a file in
> your local CVS tree, do you actually check it out from that tree and work
> on it and check the modified version back in or do you directly modify the
> file in the local CVS tree.

I work in the checked out code for Krita -- changing the files in the result 
of 'cvs co koffice'. If you haven't got KDE cvs commit access, you can create 
a unified diff with cvs diff > mydiff. (Use the attached .cvsrc). Anyone with 
commit access then can commit that diff using their own tree.


-- 
Boudewijn Rempt | http://www.valdyas.org/fading/index.cgi
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