[argyllcms] Re: is my colorimeter broken?
- From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 10 Jun 2009 23:11:02 +0400
Karl Beckers wrote:
> quick question: Is there any way to detect whether my i1d2 is broken
> other than comparing its results against known good results?
May be yes, but probably no. If you've find that softproof is "close",
therefore the colorimeter is most likely OK.
I've struck such problem when calibrating the MVA TV-display. Probably your
display white point is very far from any correct white. In addition, the
display black point isn't enough black and have considerable tone shift. So the
display may be just a TV-display or laptop display which not intended for color
work.
I've solved my problem by the service menu of my TV-set (which has the
PC-display mode). I've corrected the R,G,B values to match the white locus
curve with help of Argyll dispcal. The resulting equivalent temperature of
white for my TV-display was about 9500K. When I comparing the realtive gamut of
my TV-display with relative sRGB, I found that it is quite close to the
reference. But when I try to tune the display white to 6500K for example, I
have significant brightness decrease, poor contrast and not neutral black,
because the black is not adjustable by the display itself. So I think, your
case may be close to mine.
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