How do I calibrate 10 point gamma with colorhcfr? - AVS Forum | Home Theater Discussions And Reviews

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post #1 of 6 Old 12-30-2015, 12:00 PM - Thread Starter
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How do I calibrate 10 point gamma with colorhcfr?

I've used this guide and hcfr to calibrate my tvs for years http://www.curtpalme.com/forum/viewtopic.php?t=10457

The problem is it doesn't cover calibrating 10 point gamma and I have absolutely no idea how to do it. Can anyone talk me through it?

Thanks.
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post #2 of 6 Old 12-30-2015, 12:26 PM
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moving the RGB points at each IRE in the minus direction
lowers the luminance so gamma goes up.
increasing the RGB increase luminance so gamma goes down.
this is the general way.
use 2 point first. same deal.
then switch to 10 point and measure first to see if the 2 point changes stayed.
if the 2 point changes did stay, then you can use both 2 and 10 to bend the luminance curve to your target.

be aware, color temp D65/6504k will be done at the SAME time.

so first, run measures with different tv settings of both color temp and gamma settings to find the combo that gets the grayscale and gamma close.

Loving D65
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post #3 of 6 Old 12-30-2015, 01:00 PM
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While you're adjusting the 2-point or 10-point controls on the TV, make sure to switch the preview window in HCFR to Gamma. That allows you to see your changes in real-time.

Henry
Vizio M70-C3
Onkyo HT-RC360
Synology DS1813+ & DX513 x2
X-Rite i1Display Pro, ArgyllCMS, DisplayCAL, madVR, HCFR
HTPC running Kodi with MPC-HC + madVR, Plex for remote streaming
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post #4 of 6 Old 12-30-2015, 02:27 PM
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Quote:
Originally Posted by Overhaze View Post
The problem is it doesn't cover calibrating 10 point gamma and I have absolutely no idea how to do it.
I have outlined the steps in a previous post:
LG 60" PB5600 Calibration (Following "For Dummies")
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post #5 of 6 Old 12-31-2015, 06:57 AM
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Quote:
Originally Posted by VBB View Post
While you're adjusting the 2-point or 10-point controls on the TV, make sure to switch the preview window in HCFR to Gamma. That allows you to see your changes in real-time.
A further note if you're trying to adjust the gamma using the 2-point controls [NOT recommended!]: when monitoring the 70- or 80-IRE point, the gamma curve on the preview may appear to be responding to the adjustment of RGB-High controls in real-time, but it will not show the actual gamma until you re-measure the 100-IRE point - and that will be very different.
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Last edited by Dominic Chan; 12-31-2015 at 10:49 AM.
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post #6 of 6 Old 12-31-2015, 02:04 PM
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Quote:
Originally Posted by Dominic Chan View Post
A further note if you're trying to adjust the gamma using the 2-point controls [NOT recommended!]: when monitoring the 70- or 80-IRE point, the gamma curve on the preview may appear to be responding to the adjustment of RGB-High controls in real-time, but it will not show the actual gamma until you re-measure the 100-IRE point - and that will be very different.
Thank you Dominic. I was thinking grayscale for some reason

Henry
Vizio M70-C3
Onkyo HT-RC360
Synology DS1813+ & DX513 x2
X-Rite i1Display Pro, ArgyllCMS, DisplayCAL, madVR, HCFR
HTPC running Kodi with MPC-HC + madVR, Plex for remote streaming
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