[HDR-photo] Why does the preview look better than the final output image?

[keith.henson21 at ntlworld.com]

> no Vista

8gb of memory Dual Processing but I've had it crash with an Error twice in the last ten minutes too.
> From: Bob Wise <bob at bobsplanet.com>
> Date: 2007/03/27 Tue PM 04:04:48 GMT
> To: High Dynamic Range Photography <hdr-photo at hdr-photography.com>
> Subject: Re: [HDR-photo] Why does the preview look better than the
> 	final	output image?
> 
> 
> I haven't had a crash. I'm running WinXP SP2 on a dual-core conroe w/ 
> 2gb main memory. You?
> Not using Vista are you? :-)
> 
> -Bob
> 
> On Mar 27, 2007, at 8:04 AM, <keith.henson21 at ntlworld.com>  
> <keith.henson21 at ntlworld.com> wrote:
> 
> > Hi guys,
> >
> > I've been putting 2.4 through some serious work over the last few  
> > days and when it's doing the job it's great, but it seems a bit  
> > 'buggy' and crashes on a regular basis.
> >
> > Has anybody else noticed this?
> >
> > Keith
> > www.northscape.co.uk
> >>
> >> From: "Geraldine Joffre" <hdr-photo at hdrsoft.com>
> >> Date: 2007/03/27 Tue AM 09:36:13 GMT
> >> To: High Dynamic Range Photography <hdr-photo at hdr-photography.com>
> >> Subject: Re: [HDR-photo] Why does the preview look better than the  
> >> final
> >> 	output image?
> >>
> >> On Mon, 26 Mar 2007 17:02:24 -0700, Bob Wise wrote
> >>> Perhaps a silly question... can the software not provide the preview
> >>>  algorithm as an option for image processing?
> >> The preview algorithm is already used for the final result. The  
> >> difference is
> >> not in the algorithm but in the size of the image to which the  
> >> algorithm is
> >> applied. If you resize your HDR image to the size of the preview,  
> >> then the
> >> final output will be exactly the same as with the preview.
> >>
> >> Actually, in case you get a large difference with the preview,  
> >> with the final
> >> result being very dark, resizing the image only slightly may be  
> >> sufficient. In
> >> this case, the dark final result is because the HDR image includes  
> >> too many
> >> abnormally low values which confuse the Details Enhancer  
> >> algorithm. But if you
> >> resize the HDR image, the interpolation done for resizing should  
> >> smooth out
> >> the outliers low values, and the algorithm should then work normally.
> >>
> >> Geraldine Joffre
> >>
> >> _______________________________________________
> >> HDR-photo mailing list
> >> HDR-photo at hdr-photography.com
> >> http://www.hdr-photography.com/mailman/listinfo/hdr-photo
> >>
> >
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