wb changes automatically and behaves not logic

Submitted by arkitekt on Fri, 05/08/2015 - 05:54
Forums: 
Bug reports

i set the wb to custom, then i go to another picture and come back, the wb changes from custom to daylight (5143K/-14). it's quite near to custom (5149K/-), but its not the same and its disturbing, because its changes by it self.
i dont get the concept of wb either, what are the settings, if i want the wb not changed with the next pic? what does "next" really mean - if i go back several pics, the this would be also the "next" (and changed). could you please explain wb more in detail?
i have the same pic twice, i import them into lightroom, both with wb "as shot", but one with wb set to "as shot" (so it gets an xmp). then those picture look different. the one with the xmp has a strong color cast. 
at the moment, im going to delet all xmp files, because i get a color cast in LR - quite a bit time wasted ... 
thx for your help

lexa

Fri, 05/08/2015 - 06:48

The real WB is not Temperature/Tint, but WB coefficients for diagonal color adaptation matrix.

So, real coefficients are transformed to temperature/tint to dispay, than back. Precision is limited, but always within tolerance limits.

Please note, that Temperature/Tint is useless if different color profile is used. FRV's profiles are very close to Adobe's (last versions), but Adobes changes from version to version.

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Alex Tutubalin/FastRawViewer team

arkitekt

Fri, 05/08/2015 - 09:12

@lexa
thx for your quick reply, which doesnt help me much (i understood, what youre saying). there is still the problem, that frv changes some values by it self and when i "optimize" a pic (creats an xmp file),  in LR its worse than one without xmp. 
is there any tutorial, so i can use the those feature properly? otherwise i will not use the any settings in frv.  
many thx

lexa

Fri, 05/08/2015 - 15:39

You contacted us via contact form too.

Could you please provide the data we asked:

 - What camera

 - Do you use Color management on or off

 - If possible, sample file

 

 

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Alex Tutubalin/FastRawViewer team

lexa

Mon, 10/19/2015 - 08:40

Dear Sir,

several WB issues has fixed in FRV 1.2, also WB calculation is more compatible with Adobe programs.



FRV 1.2-Beta available here: http://www.fastrawviewer.com/testing/fastrawviewer-1-2

--

Alex Tutubalin/FastRawViewer team

Midori

Wed, 03/01/2017 - 05:49

Hey Arkitekt,  I suffer the same issue!
My thread also highlighted same problem, see  http://www.fastrawviewer.com/node/154
The problem is with our workflow and FRV workflow being different. In my case I shoot fashion runways (catwalks) and return with 1000 images all of which are shot in a controlled lighting environment. Before exposure adjustment, it is essential to decide and set a single value of White Balance (WB) because otherwise wrong exposure adjustment will occur. As you say, random viewing to decide and set an appropriate Custom WB causes xmp files to be generated for random images. Then when sweeping thru the full set of images. those random xmp files cause parsing of custom WB to fail, and everything thereafter screws up. 
I reverted from FRV to Lightroom for  WB & EV for 12 months, using LR WB batch sync, then using LR Auto Tone as batch process (this is very fast by the way). This worked well, but I returned to FRV 12 months later to try to overcome the problem.  This is a get-around for FRV:-
A - Disable Preferences/XMP/Read Only XMP (already default value probably)
B - Disable Preferences/XMP/Force XMP Creation.
C - Delete all xmp for the batch to be processed.
Note:   This will be the default Preferences with which FRV should open initially. (Restart FRV when you first make changes to be sure)

1 - Study images,  and decide and set a Custom WB which is to be deployed on all images within batch. (at this point no xmp are written).
2 - Now select first image in the batch to start from.
3 - Enable Preferences/XMP/Force XMP Creation
4 - Set your chosen value of for WB on the first image
5 - Adjust Exposure, etc whichever way you chose, and scroll ONCE thru the images doing similar adjustments (no need to do WB adjustment of course).
 
Finally before closing FRV, disable Preferences/XMP/Force XMP Creation. This will then enable you to  start procedure from 1 - when starting next workflow.
If FRV added a Keyboard Shortcut to toggle Preferences/XMP/Force XMP Creation,  life would be easier !

Windows 7 Professional 64 bit
FRV Windows x64-DX9
 

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