[argyllcms] Re: AW: Re: Problem with scanner calibration ISO 12641-2
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 21 Aug 2019 23:05:22 +1000
Hermann-Josef Röser wrote:
Hi,
I have streamlined my script to make it easier for analysis. I have also
uploaded all the input and output files as well as the log files to my Adobe
"fog" for retrieval: https://adobe.ly/2uYFMge
Input:
=====
E171004.cxf
Targetscan_1.tif
Targetscan_2.tif
Targetscan_3.tif
What worries me is the last line of the output from profcheck:
--> Profile check complete, errors (CIE94): max. = 69.509693, avg. =
21.758189, RMS = 25.497098
yes, this indicates a problem with the scanin process, and indeed,
looking at Targetscan_3_diagnostic.tif straight away shows the problem:
the chart is 180 degrees out of alignment.
I can't reproduce this though. If I run the command you list in your .bat file,
I get
a wrong alignment, but the chart is displaced one line down, not 180 rotation.
[ That would seem to indicate either a different set of options, or the
Targetscan_3.tif no longer matches the Targetscan_3_diagnostic.tif. ]
In fact, I can't get any of the 3 charts to align automatically with the files
you made available.
The easiest way of working around this I found was to crop out the
extraneous text on each scan. Another way would be to provide explicit
fiducial coordinates. With the charts properly aligned I get a self-fit
error in the profile of some where around average 0.7 and peak 5.6 delta E.
Cheers,
Graeme Gill.
Other related posts:
