Originally Posted by Franin
I have a question if anyone can answer. I have been thinking about this and wanted to see what members here think.
I have a JVC X35/RS46 and the Lumagen 2041. Which option is the best way to calibrate:
- Use the internal test patterns of the JVC to calibrate the Greyscale & Gamma multipoints adjust going through the JVC and use the 2041 test patterns for the 3D Lut CMS going through Lumagen 2041
- Use the Lumagen 2041 test patterns to calibrate the Greyscale & Gamma mulitpoints adjust going through JVC and 2041 test patterns for the 3D Lut CMS going through Lumagen 2041
- Use the internal test patterns of the JVC to calibrate the Greyscale & Gamma multi points adjust going through JVC and JVC internal test patterns for 2041 3d Lut going through 2041
Just curious to read which way members would go.
So I assume you are doing a 3D LUT cal using Calman ?!? (u need to state exactly what your calibration approach is)
regarding patterns, you ALWAYS want pattern to go through the entire signal chain, so that the (final) calibration can accommodate for any distortion devices in the chain may introduce...
regarding your pre-3D LUT PJ setup:
* choose a wide gamut, larger than your target gamut of Rec 709 (--> the CM 3D LUT will bring that in)
* you can pre-adjust GS and Gamma in the PJ before profiling to bring the PJ in better shape and make it easier for the 3D LUT, I def recommend at least setting the white point as accurately as possible
there's no need to manually adjust the 3D LUT stored inside the Lumagen, unless you are not using CM to create a 3D LUT but then why would you post here... ?
once CM has profiled the display, created the 3D LUT and uploaded it to the Lumagen, DO NOT ADJUST ANY VALUES (not the GS, not the Gamma, and not the 3D LUT data).... no matter what you think and what others "tell you"... it will throw off thousands of colors whether your eyes immediately notice that or not depends on the verification patterns u're viewing.... but u are messing with the offsets that the color engine calculated from lots of data...
if u don't like the 3D LUT results (as always: validate results and PJ performance with a large validation patch set
), then try to improve your pre-profile setup or try other solutions (as a comparison)...