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

[Gabbygall]

Down-sizing seemed to go someway to getting it right, but the preview still
looks better. Hope they can get it right before V3 comes out.

-----Original Message-----
From: hdr-photo-bounces at hdr-photography.com
[mailto:hdr-photo-bounces at hdr-photography.com] On Behalf Of Bob Wise
Sent: 27 March 2007 22:13
To: High Dynamic Range Photography
Subject: Re: [HDR-photo] Why does the preview look better than the
finaloutput image?

Thanks Geraldine... I'm not quite sure I understand.

Are you suggesting to:

1) Upres the image
2) Run the HDR processing
3) Down-res the image?

-Bob

On Mar 27, 2007, at 2:36 AM, Geraldine Joffre wrote:

> 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
>
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