Originally Posted by guida74
Those are some pretty good tips and I will try them this weekend. HCFR is limited to basic measurements; you really need a good understanding of color science so that you can interpret the data.
This is my first attempt at calibrating so please bear with me. What do you think of the before& after graphs overall. The picture definately looks warmer with more natural colours to my eyes. Can you interpret the gamma "u-shaped" graph for me in laymens terms. Is this acceptable in the world of videp calibration?
I am no expert by any means and have never used HCFR.. but I am guessing that the brightness and contrast are not correct. The lower end of the range is to bright (to much light) and the upper end is not bright enough. I assume there are no gamma adjustments on your projector.
Again not sure how HCRF works, but in Calman, the 100% is what is used to calculate the gamma at the end of the run, so if you do a full run, then change something, the only way to get an accurate graph is to do the complete run again so the software knows what the light output is at each percentage.
Write down the setting you have now.
Reset everything to default
set your brightness and contrast with the AVS disk (17 just flashing) everything below 254 flashing, all bars flashing up to 254 on the color clipping chart.
Then put up a gray scale ramp if you have no way to display chads patterns and what I talked about to see the interaction of cuts and gains.
find out what color clips first and then proceed to do the 2 point.
After the initial first set of adjustments at 80/30, go back to the brightness and contrast patterns and reset both if need be.
Then continue with 2 point.
When you are done with 80/30 recheck Br/Cont and do a complete run. If you have any colors that peek or dip along the way, you want to try and level them out, which may mean you need to give up some small amount of perfection on the 30 and 80 points. Watch our DeltaE charts (I assume HCFR has them) keep them below 3. It is better to have all of them for instance under 2 than to have 30/80 .5 and 50 and 60% 3.5
Get the gray scale correct with the brightness and contrast correct. If your display has no gamma adjustment you are stuck with whatever the gamma is. There is no way to effectively change it without gamma controls or a 10 point adjustment.
Just took a quick look at your projectors users guide.
These are the setting I would use to start with to do the calibrations
Image advanced setting
Noise Reduction off
Color temp Warm (but measure each to see which is closest to D65 if you have not)
Pure engine off
dynamic black off