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Some 'camera tone mapping' results

Posted: Mon Oct 08, 2007 1:39 pm
by OnoSendai
Here are some results, after calibration, using data from Carbon's experiment. See http://www.indigorenderer.com/joomla/fo ... php?t=2046 for more details

Camera was a Nikon D80

Camera white balance was set to 2800K.

Indigo white point was set to A (correlated colour temperature of 2856K)

More results will follow shortly.


8 second exposure:

Image
photo

Image
render


4 second exposure:
Image
photo

Image
render

0.5 second exposure:
Image
photo

Image
render

Posted: Mon Oct 08, 2007 2:19 pm
by CoolColJ
nice - colour looks better than the actual photo :o

great to finally have Indigo calibrated!

Posted: Mon Oct 08, 2007 11:38 pm
by Kram1032
What I can see, is, that your renders are more saturated than the shots...

Could be an Exponent + bumpmap issue (or the lack of one), though....
would be very hard, to get that right.
Oh, and it also could be the lack of that black cloth, that also reflects light, which gets ignored in your test...

especially the very dark photo shows bandings, so, Indigo is superior in that point. :)

Besides those two things and the slightly folded appearance of the photo-chart and some slight noise in Indigo, they match :D GREAT WORK!!!!

Posted: Tue Oct 09, 2007 4:42 am
by kadajawi
Kram1032 wrote:What I can see, is, that your renders are more saturated than the shots...

Could be an Exponent + bumpmap issue (or the lack of one), though....
would be very hard, to get that right.
I think the color issue is due to the camera software, the sensor, ...
Looks pretty good I think, quite close, close enough for me :)

Posted: Tue Oct 09, 2007 4:53 am
by Slobodan
All I can say, it's WOW. Great job ONO. I think this is as close as it's going to get considering all the conversion factors and different environment (studio/indigo).

Just WOWOWOWOW..

Thanks ONO..

Posted: Tue Oct 09, 2007 7:20 am
by manitwo
many thanks nik and carbon !

Posted: Tue Oct 09, 2007 1:03 pm
by carbon
hi Ono
did you used the jpeg or raw files, because jpgs are indeed processed by camera software, raws are usually less saturated in their default.. and also have less contrast..

and Kram, what you see is not black cloth but glance of black velvet (nothing is less reflective except black fur)..

banding is caused by uneven glass of clear light bulb..

c.

Posted: Wed Oct 10, 2007 4:19 am
by Kram1032
what's about Super Black?
:shock:

Posted: Wed Oct 10, 2007 4:23 am
by OnoSendai
carbon wrote:hi Ono
did you used the jpeg or raw files, because jpgs are indeed processed by camera software, raws are usually less saturated in their default.. and also have less contrast..

and Kram, what you see is not black cloth but glance of black velvet (nothing is less reflective except black fur)..

banding is caused by uneven glass of clear light bulb..

c.
Jpegs.

Posted: Wed Oct 10, 2007 4:39 am
by suvakas
Very very nice stuff Ono!
I can't wait to use it.

Posted: Wed Oct 10, 2007 12:06 pm
by CoolColJ
Ok I guess this is what the new exposure settings is for :)

Posted: Fri Nov 02, 2007 5:52 am
by 5OnIt
Now if I just knew what all this meant and how to use it!

A page that explains the difference between the three tone mapping methods would be nice. Can someone post a link please.

Posted: Fri Nov 02, 2007 6:44 am
by CTZn
Indeed the documentation is lacking. Would be cool if someone could update the wiki, before leaving 3d and Indigo ^^

thx