The Official ChromaPure thread - Page 216 - AVS | Home Theater Discussions And Reviews
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post #6451 of 6456 Old Yesterday, 01:29 AM
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Dear TOM!
1) What %background APL and ARL in yuor wonderfull calibration disk?
2) Why in the gamma is not possible to separate output by color -red, green, blue?
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post #6452 of 6456 Old Yesterday, 02:26 AM
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Quote:
Originally Posted by anta1974 View Post
Dear TOM!
1) What %background APL and ARL in yuor wonderfull calibration disk?
2) Why in the gamma is not possible to separate output by color -red, green, blue?
I don't understand the first question. APL is the average level for the entire screen, not just the background. I don't know what ARL stands for. In any case, the black backgrounds are 16. The APL patterns have an APL of about 25.
RGB Gamma is the same thing as grayscale. It is redundant.
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Tom Huffman
ChromaPure Software/AccuPel Video Signal Generators
ISF/THX Calibrations
Springfield, MO

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post #6453 of 6456 Old Yesterday, 09:55 PM
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Originally Posted by CalWldLif View Post
bt1886

Tried BT1886 and can't say I like the result. Maybe I'm doing it wrong. Color is awfully dull.
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post #6454 of 6456 Old Today, 02:03 AM
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I tried BT1886 myself last week, but although I'd ticked the box to manual measure white and black levels it didn't seem to let me change them as they are greyed out. As they were at 0.003 and 120 I left them there and the autocal (using a Lumagen 2041 with 729 point CMS), but results were poor with quite a few dEs in the 'poor' range (about 5% IIRC) for the colour gamut.

I plan to have another go soon, but I need to know how to set the black and white levels before I try with BT1886 again.

Zooming: Been there, done that, bought the lens...now using e-shift.
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post #6455 of 6456 Old Today, 04:23 AM
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Originally Posted by Kelvin1965S View Post
I tried BT1886 myself last week, but although I'd ticked the box to manual measure white and black levels it didn't seem to let me change them as they are greyed out. As they were at 0.003 and 120 I left them there and the autocal (using a Lumagen 2041 with 729 point CMS), but results were poor with quite a few dEs in the 'poor' range (about 5% IIRC) for the colour gamut.

I plan to have another go soon, but I need to know how to set the black and white levels before I try with BT1886 again.
You must enter your manual values for 0% IRE and 100% IRE in Options...there you will find BT.1886 and enter your own values.
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post #6456 of 6456 Old Today, 07:46 AM
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Originally Posted by maximus74 View Post
You must enter your manual values for 0% IRE and 100% IRE in Options...there you will find BT.1886 and enter your own values.
I'm pretty sure I tried this as I changed the black level to 0.04 to see if it appeared on the autocal page with this setting, but it remained at 0.03.

Zooming: Been there, done that, bought the lens...now using e-shift.
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