[argyllcms] Causes of and remedy for black crush
- From: Jos van Riswick <josvanr@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 30 Jul 2013 11:55:22 +0200
Hello
I've been using argyll / dispcalgui for my eizo 2232w monitor for some time
now. I'm quite happy with the results but I never manged to get rid of the
'black crush'.
If I look at my monitor at 90 deg angle (ie I'm sitting exactly straight in
front of it), the shadow details disappear. But when I move slightly to the
sides, I can see details in the shadows again. Calibration doesnt seem to
help.
Now I was pondering this last night in bed and it occurred to me that it is
no wonder the calibration doesn't help. The calibration device (i1pro) is
sitting directly on top of the monitor, so it receives light emanating from
all directions from the surface. Where as the light *we* view from the
monitor, at some distance, is emanating from it more or less at an angle of
90 degrees. So if the angluar distribution of light intensity is smaller at
90 degrees, the calibration will always be too dark there.
I was trying to think of some way to remedy this. Maybe have the
calibration device look through a 'honey comb' (ala studio lights) or have
the calibration device sitting at a distance, looking through a telescope
or binoculars. Is there some way to compensate the effects of looking
trough a telescope?...
josvanr
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