Does DNG Converter 5.6 Alter WB Info of DMC-LX3 RW2s?

Question

I have converted a Panasonic DMC-LX3 generated ".RW2" to DNG using DNG Converter 5.6 for the exclusive purpose of being able to open it in the current version (2.1040) of Rawnalyze. The conversion prodeeds OK, and I am able to view the resulting DNG in Rawnalyze. It is my (humble, and barely-informed) understanding that the DNG Converter 5.6 performs de-mosaicing upon the RW2. However, I am uncertain as to:
(1) Whether or not the DNG Converter 5.6 has altered any White Balance information contained in the original DMC-LX3 RW2 image-file; and
(2) Whether any such alterations as described above in (1) result in an alteration of the "Shot WB Coefficients" (that I am assuming represent the DMC-LXW "raw" mode White Balance Scales) displayed when Rawnalyze is in Histogram display mode.
My goal is to accomplish a "UniWB" scheme using the DMC-LX3 - by setting the "Custom White Balance" in the DMC-LX3 to a self-created color-target image displayed on my computer's LCD/TFT flat-screen display. See:
http://ricohforum.com/phpbb/viewtopic.php?f=22&t=1556&start=50#p17852
My original self-created color-target image was derived from the DxO Mark database for the DMC-LX3 Firmware Level 1.0 first published on or around November 17, 2008. See:
http://ricohforum.com/phpbb/viewtopic.php?f=22&t=1556&start=40#p17389
for my initial details (including a link to the DxO Mark database entry for the DMC-LX3).
The DxO Mark White Balance Coefficients are: Red = 2.55; Green = 1.00; and Blue = 1.52.
When I used the relative weightings listed directly above to create a color-target (using the DMC-LX3 at the latest Firmware Level 2.1, and using the "Standard Color" selection within the "Film Mode" settings: Contrast = 0; Saturation = 0; Sharpness = -2; and Noise Reduction = -2) ...
the resulting DNG (converted from a DMC-LX3 RW2) shows "Shot WB Coefficients" as: Red = 1.0760; Green = 1.0000, Green = 1.0000; and Blue =1.1597 when viewed in Rawnalyze Histogram display mode.
My first (humble, and barely-informed) assumption from the above result is that (perhaps) I need to re-scale the DxO Mark White Balance Coefficients used in my initial experiment by a factor equal to what Rawnalyze reports as the "Shot WB Coefficients". When I do such a re-scaling (shown here rounded to four digits following the decimal point - despite the fact that the original DxO Mark data is only precise to two digits following the decimal point), I get:
Red = 2.370
Green = 1.0000
Blue = 1.3107
I am thinking that I should make a new color-target for setting the DMC-LX3 Custom White Balance where the relative weighting of Red, Green, and Blue in the color-target reflects the above-listed modified RGB Coefficients. In fact, I did just that (as you will find if you read the first Ricoh Forum post that I cite above) ...
However, I am (just barely) wise enough to recognize how little I know about these things (details surrounding "raw" image-files in general, the Adobe DNG Converter 5.6, and the very interesting Rawnalyze 2.1040. I want my action sand information disseminated to be accurate (for the benefit of my own DMC-LX3 "UniWB" implementation scheme, as well for the benefit of any readers who might assume that I actually may know something about what I am posting!).
Gabor, I know that you are out there somewhere (it appears only a few hundred miles to the north of me in Seattle). I have been doing all the "Googling" and forum-reading that I can to try to understand the details of these matters (including reading your Rawnalyze on-line help information). If you have the time - would you be so kind to enlighten me as to what your understanding of these matters is (or, if possible, refer me to information sources where I might be able to be able to figure these specific questions out on my own). Many thanks!

Answer 1

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It is my (humble, and barely-informed) understanding that the DNG Converter 5.6 performs de-mosaicing upon the RW2
You could convert it in demosaiced format (it is an option under Preferences, if you select the compatibility as "Custom"); however, if Rawnalyze can display the DNG, then it is certainly not demosaiced.
function(){return A.apply(null,[this].concat($A(arguments)))}
Whether or not the DNG Converter 5.6 has altered any White Balance information contained in the original DMC-LX3 RW2 image-file
The converter usually changes the temperature and tint; however, Rawnalyze displays the coefficients of the raw channels, which are stored in the raw file either by the camera or by the raw/DNG converter.
function(){return A.apply(null,[this].concat($A(arguments)))}
the resulting DNG (converted from a DMC-LX3 RW2) shows "Shot WB Coefficients" as: Red = 1.0760; Green = 1.0000, Green = 1.0000; and Blue =1.1597 when viewed in Rawnalyze Histogram display mode
This is not excellent, but not horrendeous either. Have you tried using a totally clipped raw image as white balance template? It works with some cameras, but not with all. Give it a try and post the results pls:
a. shoot a white sheet with +4 EV bias,
b. verify in Rawnalyze if everything was clipped,
c. load that raw image in the camera as WB template,
d. make a shot with "custom WB" or whatever the name of that option is with your camera, i.e. using the previous shot as WB template,
e. verify the WB coefficients; they should be very close to 1.
Gabor