Quoting Cory Papenfuss <[EMAIL PROTECTED]>:

>       Irfanview is based on dcraw for its RAW conversion.  I've had 
> issues with dcraw in doing starry-night conversions because of the
> way it 
> decides on the white point.  By default, I think it chooses the
> white 
> point at the luminosity of the 99th percentile of the photo.  Thus,
> by 
> default, 1% of the pixels are blown out.
> 
>       I've changed that setting on my version of it a few times to make
> 
> it 99.9th or 99.99th percentile for star photos.  Works great.


That's interesting.  I've had a similar experience with the interpretation of 
Raw files in Studioline Photo Classic, a program that I use for cataloging 
images.  It also uses dcraw.  The raw conversion of photos I took some months 
ago of Comet McNaught are all blown out badly in the Studioline conversions.

I don't quite understand the setting changes you made to Irfanview.  Can you 
elaborate?


Cheers

Brian

++++++++++++++++++++++++++++++++++
Brian Walters
Western Sydney, Australia
http://members.westnet.com.au/brianwal/SL/
http://www.pentaxphotogallery.com/brianwalters

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