Panasonic GX9 color profile

[dpawson]

https://filebin.net/ktdcj5hptq1x3x1t daylight image.
I have the data files associated with this image if needed.
Charge: R170112

Tungsten file added - 194

[Beep6581]

@dpawson thank you but that shot does not meet the quality requirements. Please follow the shooting instructions at http://rawpedia.rawtherapee.com/How_to_create_DCP_color_profiles#Shooting_the_Color_Target and submit both daylight + tungsten shots.

[dpawson]

Tungsten added. What else is wrong?
OK, very precise. Will try again later today.

[dpawson]

Try again
https://filebin.net/ktdcj5hptq1x3x1t

Wolf Faust C1 Din A4, IT8.7
Supporting files available

[Beep6581]

@dpawson take 2 is much better, but it seems the shot marked as tungsten is actually also daylight.

The shot is now evenly lit, not distorted, fills not more and not less than ~1/3rd of the frame, has a non-reflective background, in-focus, low ISO, good aperture. All good.

Remaining areas of improvement:

1. I could increase exposure by +1.3EV without clipping. Would be perfect if you could bracket by 1EV and send the 0EV and +1EV shots.
2. Please include info on where you took the daylight shot, as daylight in Norway is a bit different to daylight in Uganda, for example, and I'd like to keep track of this info for future reference.

[Beep6581]

camconst.json so far, white levels need to be improved:

diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 35cb524a..d30bd7a2 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -1938,6 +1938,15 @@ Camera constants:
         }
     },
 
+    { // Quality X, no white frames yet
+        "make_model": [ "Panasonic DC-GX9" ],
+        "dcraw_matrix": [ 7564,-2263,-606,-3148,11239,2177,-540,1435,4853 ], // ColorMatrix2 from Adobe DNG Converter 10.3
+        "ranges": {
+            "black": 16, // 271? BlackLevelRed=128 + BlackLevel=143 143 143 143
+            "white": 4080
+        }
+    },
+
     { // Quality B, Same as Panasonic G7
         "make_model": [ "Panasonic DMC-G8", "Panasonic DMC-G80", "Panasonic DMC-G81", "Panasonic DMC-G85" ],
         "dcraw_matrix": [ 7610,-2780,-576,-4614,12195,2733,-1375,2393,6490 ], // DNG_v9.7 D65

[dpawson]

tungsten.0 and tungsten.1 (+1ev) uploaded, same location.

[Beep6581]

@dpawson in addition to the color target shots, we also need to find out where the sensor clips so that clipped white stays white instead of getting a magenta cast. Maybe this data can be copied from some other Panasonic model - @iliasg is the expert.

If you would like to go ahead and take the required shots to measure the white levels, the instructions are here:
http://rawpedia.rawtherapee.com/Adding_Support_for_New_Raw_Formats
Looking at the other Panasonics, it looks like aperture scaling isn't taking place so we don't need those, we'd only need white-frame shots at:
ISO 100, 125, 160, 200, 400, 800, 1600, 3200, 6400, 12800, 25600.

[Beep6581]

@dpawson there is too much glare in the tungsten shot (over 1.5 stops) and a clear light fall-off from the top-right corner to the bottom-left:

[dpawson]

"white frame"? What is meant by that?
Under daylight and tungsten?

The 'fall off' is due to my avoiding glare. Suggestions please how to set up to avoid fall-off
and glare?

Sorry, you asked for location. 52.5695° N, 0.2405° W - mid UK

[Beep6581]

Under daylight and tungsten?

The light used for white-frames is irrelevant, as long as the entire frame is clipped white.

What is meant by that?

See the link.

Suggestions please how to set up to avoid fall-off
and glare?

First, position yourself and the light source in such a way that there is no glare. Then, if due to this the light fall-off becomes too strong, move the light source further away but keep the same angle.
I usually have the lamp 2 meters behind me, at an angle of 10-30 degrees.

P.S. Avoiding glare is only relevant for the target shot. The white-frame shots are meant to be entirely clipped, so it's as simple as setting your camera to each required ISO, e.g. ISO120, pointing at the sky or at a lamp and overexposing by several stops so that the entire frame is completely clipped.