Re: RAW images look great in GQView, how does it do it?

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On Thursday 03 May 2007 07:36, Patrick wrote:

> I have a Nikon camera that I was convinced to set to write RAW image
> files. GQview can open and view these raw files and they look great.
>
> When I use a program like ufraw-batch to convert them to jpeg they
> look horrible! Very dark and useless. I have tried to tweak ufraw to
> produce similar results to gqview but it is very time consuming and it
> is not something I want to waste time doing. And it never looks as
> good as gqview anyway!
>
> How does gqview make the nef files look so good when ufraw makes them
> look so bad? How do I duplicate what gqview is doing and create jpg
> files?
>
> Thank you for any help!
>
> Patrick
>
> ps here is an example! It is a rather large png screen shot. ufraw
> output on the left, gqview viewing the nef file on the right.
> http://www.patbert.com/screencaps/snap050307-1.png

Ufraw is a very low-level raw converter; this means that you have to do all=
=20
operations manually. Especially, by default, your are still in linear=20
space, while an image needs to be converted in a 2.2 (or so) gamma space=20
to be correclty displayed on a monitor. Gqview, as other raw browsers,=20
automatically does this operation. I guess this is the most important=20
difference you can see.

=2D-=20
   Fr=E9d=E9ric

   http://www.gbiloba.org

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