Understanding HDR in another way  

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magphil
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Understanding HDR in another way

by magphil » Sun Oct 29, 2006 6:03 pm

Check this site :
http://www.farrarfocus.com/ffdd/

They have changed the concept of blended exposure : get 8 stops dynamic range in a single tiff/psd without noise, and with no hdr artifact what-so-ever.

I bought the tool (version 4 was only 30$ with 1 year free upgrade, while version 5 is now 90$ !) and I am still learning but in principle, the idea is nice and their result is quite impressive.

I am sure autopano could apply similar technique to blend exposure : get the entire almost noise free dynamic range in a single blended 16 bit file. The draw back is that you need to load it in photoshopand work with masks which takes a huge amount of time on very big files.

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francois.simond
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by francois.simond » Tue Oct 31, 2006 3:16 pm

You are talking about http://www.farrarfocus.com/ffdd/blend.htm, right ?

I think that this exposure blend concept is already used for many years, but was mainly manual work.
It looks like this photoshop script work like a rudimentary tone mapper, working by layers of zones.

Here is an example of a gimp tutorial : http://www.halley.cc/photo/multexp/ using the same method.
from 1999 : http://www.luminous-landscape.com/tutorials/blended_exposures.shtml and a newer article : http://www.luminous-landscape.com/tutorials/digital-blending.shtml
Last edited by francois.simond on Tue Oct 31, 2006 3:18 pm, edited 1 time in total.
François Simond

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magphil
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by magphil » Tue Oct 31, 2006 4:21 pm

I have also used the manual method before.

This scripts just automates it in a very efficient way.

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by rkarpa01 » Tue Oct 31, 2006 4:23 pm

Hi,

I'm using Lightzone for this kind of work: http://www.outbackphoto.com/artofraw/raw_26/essay.html


Bye, Ralf.


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