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October 24, 2012
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:iconokavanga:
Behind the scenes of the Infrared-Club (Extra-Visible Imaging) :iconinfrared-club: Leucareth :iconleucareth: and I have have been having a good discussion about the HDR and tone-mapping software known as Luminance [link]. Peviously known as "qtpfsgui", this free software is a platform for different methods for generating HDR images from bracketed exposures, and for several tone-mapping operators (TMOs) that can be used to generate low dynamic range images that we can view. One of the TMOs is known as Mantiuk 06, after the principal author of the theory, mathematics and coding. Both Leucareth and myself think this is one of the hidden gems of the HDR tone-mapped world and does not appear to be used in commercial software. Here are some examples of the gentle use of the Mantiuk TMO. The parameters used to generate the images are given below. Each of the scenes comes from 3 images at 0 and +/- 2 stops.

Pregamma 0.5; contrast mapping 0.1; saturation 0.8; detail factor 5.
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:iconeddie-81:
Mood: Joy ~eDDie-81 Nov 5, 2012
You're a professional photographer, your non-figurative nature photo-manipulations are specific and out of critique, I'm happy! :) :peace:
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:iconokavanga:
=Okavanga Nov 5, 2012
That sounds like a nice complement, Eddie, although I am not a professional. I'm just interested ion all these things.

Many Thanks

David
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:iconcolinbm1:
Mood: Joy *colinbm1 Oct 27, 2012  Hobbyist Photographer
Nice use of 'luminance' her David
Cheers
Col
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:iconokavanga:
=Okavanga Oct 28, 2012
It fairly glows I think, Col - that is one of the reasons I like the Mantiuk TMO.

Cheers

David
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:iconrobsouzza:
*robsouzza Oct 24, 2012
Very beautiful. Do the images always come out this "over"?
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:iconokavanga:
=Okavanga Oct 25, 2012
Hi Robson - many thanks, and good question.One characteristic of tone-mapped HDR images is that local contrast is enhanced, that is the contrast between "small" objects is greater than you would find in a straight single shot. By increasing that local contrast you can make the image look "over" or "over-the-top" (OTT). In this set, I have kept that aspect fairly low! Even so the effect is quite noticeable. There is a great deal in HDR work. Leucareth :iconleucareth: has some extraordinary work in this line - well worth a visit.

Cheers

David
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:iconrobsouzza:
*robsouzza Oct 25, 2012
Thanks for the explanation, David. I've already been watching Leucareth for some time, her work is impressive!
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:iconokavanga:
=Okavanga Oct 25, 2012
:thumbsup:

David
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:icongoodgirl-badgirl:
~GoodGirl-BadGirl Oct 24, 2012
It has a dream like feel to it, very nice. :)
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:iconokavanga:
=Okavanga Oct 25, 2012
Many thanks, Stacey.

Cheers

David
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