Gregg Loewen
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Gregg Loewen
KeymasterHi Rhythm,
see above your post.
email me if any problems.regards
Gregg
gregg@lionav.comKeymasteruse the HDR work flow.
Most likely do not adjust the black level and white level controls.
measure peak luminance and then enter the screen offset.
Do 2 point white balance and EOTF adjustment.
Consider multi point white balance.Keymastergood stuff.
last year Sonys would only have an accurate gamma in Cinema mode?
This years Sonys require Custom mode.Becareful when doing 10 or 20 point white balance because point 7 (as an example) may affect 50-80 %.
As a general rule of thumb always measure 20 points even if the display only has 10 points of adjustment. Also always do an entire run of measurement after doing each point to ensure no interaction.
Keymasteruse blue only mode if doing by eye.
usually do not adjust tint as it is left over from analogue days (of hue / phase).
Much better to do any tint / hue adjustments in the CMS menus.KeymasterKeymasterHi Johnny
this is a question for Calman and ChromaPure directly.
Please email them.
You may want to email Tyler directly at CalMan and Tom at Chromapure.
Both softwares are very stable, they must be assuming different target values.Gregg
Keymasterreport looks good!
the offset will make the target peak luminance around 1000 nits.
IF PEAK LUMINANCE IS AROUND 1000 NITS, then 50-65% will be at 400- 500 ? NITS (guessing ).
Keymaster“high controls”
refers the the white balance controls for the brighter part of the gray scale.
Contrast, Gains, Drives, are all examples of high controls (RGB).in the hdr workflow, select 50-65% of the gray scale as the target point for the RGB high balance point.
Keymasteri saw a lot of banding on Sony 5000 PJ that I worked on a few months ago.
Engineers are still figuring some of this new technology out.
If CMS adjustments make banding worse, then do not use the CMS 🙁Keymasterthe Sony looks good.
Use the White Balance high controls to target about 50-65% stimulus for d65.Keymaster1. correct. Remain to be aware of what you are doing at 40-50% and how that effects 75 -100. Do not go crazy with getting 40-50 perfect if 75-100 goes very bad.
2. When you select a screen offset, you are changing the target eotf. you are not changing the PJ. if you had selected the offset of 3, your reports would have looked better.
KeymasterIve only calibrated 1 Optoma. It accepted an HDR signal but converted it to SDR, with a gamma of 2.2 – 2.4 (I dont remember). It do nothing beyond rec 709.
if in HDR mode, consider rec 2020 for your color space. But with the PJs you have listed, do not look for anything accurate beyond 40-50% of rec 2020.
the 150 nits (is my example), is what you would be measuring, with lamp on high and iris open. This is the PJ running at 100% capacity.
Start with the contrast at the default position. (on the Sony 60 is a good start, but will be clipping abit). Then look for Gamma presets or other settings that will move the EOTF to be brighter or darker to match the Calman reference.
Keymasterhello Johnny.
What projector are you calibrating? Some PJs can not do more than rec 709 in HDR (ie: Sony).
In regard to setting the HDR Gamma:
using 2084 (which is an absolute)… I start at considering 1000 nits. If the PJ max output is 150 nits, then take 1000 and divide by 150 = 6.6, so round up to 7. This is the value you will enter in the large Y value for screen offset. So every measurement you perform will be multiplied by 7. Adjusting the Contrast may affect the clipping point, and or roll off.CalMan also has a BT2390 setting. Where you can select 1000 vs 4000 nits as a starting point. Tyler at CalMan recommends using this method for setting the EOTF on a PJ, Toshi at Sony does NOT recommend this, and suggests my method of creating a screen offset.
KeymasterJVC Software v 6 is needed
KeymasterI cant seem to upload the color space files. Please email me if you want them.
there is a 709, and 2020NF (no filter), and 2020 -
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