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Author Topic: High precision Scanner Scans: scanner_refl_fix now on github  (Read 664 times)

Doug Gray

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https://github.com/doug3236/scanner_refl_fix

1. Provides a way to calibrate reflection scanners that will remove re-reflection errors from different scanners.
2. Provides a mechanism to make high quality ICC profiles necessary for high precision colorimetric scans.

It includes files for a 522 patch profile with a i1Pro 2 and 2871 patch file for those with an i1iSis.

Calibration of a scanner to remove re-reflection can be done with nothing other than a good printer. Making high quality ICC profiles requires either an XRite I1Pro 2 or i1iSis spectro but does nor require any other licensed software. It creates a CGATs RGBLAB file that is easily used with Graeme Gill's Argyll free software to make ICC profiles.

The github readme files has details on usage. Expect to be able to make scans that will have significant improvements over IT8. The average errors I get scanning prints from my Pro1000 are under .5 dE 1976 average.

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Doug Gray

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Re: High precision Scanner Scans: scanner_refl_fix now on github
« Reply #1 on: August 28, 2020, 12:23:53 am »

I've added a full release to Github of scanner_refl_fix and extended the readme which documents how the program can be used for the two major functions:

1. Correcting scanning errors from reflected internal light. Similar to lens glare but can cause nearly 20% difference in light levels depending on the nearby area.

2. Automating much of the work required to produce scanner ICC profiles. This requires a spectro and requires Argyll's profiling tools, especially "colprof."

https://github.com/doug3236/scanner_refl_fix
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