Originally Posted by AdamAttewell
OK so a little progress, after turning on Epson Super White the white clipping issue was resolved.
I went ahead with leaving the iris closed right down to get to 16fL.
I adjusted the colour temperature to the 6000K setting as this seems to be closer to 6500K that the 6500K setting.
After that I moved onto the two point controls for the grayscale.
Now with the 10 point grayscale Gamma is way off 2.4 which I guess accounts for the large amounts of error.
Now after using the gamma controls.
I can see what you guys were saying about the gamma controls, there is quite some overlap between the controls with controls 1 & 8 no serving any purpose at all but making small adjustments & remeasuring every time you soon build a picture of how the controls work & I was able to get a pretty good result in terms of gamma.
So that leaves the CMS, what do you guys think of these?
Your gamma looks great after adjustment! Now you understand the pain of the manual gamma adjustment on these projectors...
Regarding your CMS you can probably get it dialed in almost perfect. Most of my dE levels are less than one on my saturations/luminance.
This is actually pretty easy to do. For each saturation level you adjust the "Hue" which moves the data point between two colors (imagine a line between them, the data point moves along it). The saturation moves the data point away from the center/white. Finally, the brightness affects the Y (luminance) value. Keep in mind that Y will also be affect by saturation and sometimes hue. So I do the following for each color in the CMS:
1. Go to the 80% saturation level and adjust hue and saturation until the point is as close to "in the box" as possible.
2. Then adjust brightness to get Y close to target.
3. If the data point has moved outside of the box go back to 1 and repeat until you get as close as possible x,y and Y.
4. Verify that the other saturation levels are good. Maybe make some adjustments to move the whole color a bit to compromise and get the best overall results.
It is important not to sacrifice accuracy on lower saturation levels in order to get 100% to match. Try to get 20-80% very accurate and hope that 100% is close.