Hi Andy, I have just discovered that the GIMP can work with color profiles. See http://www.coloraid.de/, which was referenced at http://www.normankoren.com/color_management_3.html Norman Koren has a web site that discusses a lot of aspects of digital darkroom. To calibrate things, you need a printed color chart, an example of which is the IT8 target. I have seen them sold by Praxisoft for $70.00, but you can get the same chart from Germany for $10.00 US + $5.00 S&H. Check out SCARSE which is a Linux program for scanner profiles. HTH, Skip
-----Original Message----- From: wlug-admin@mail.wlug.org [mailto:wlug-admin@mail.wlug.org]On Behalf Of Andy Stewart Sent: Friday, December 27, 2002 1:09 AM To: Worcester Linux Users' Group Subject: [Wlug] Color matching scanned photos vs. printed output
Hi Everybody,
I've been playing with my new toy, an Epson 1660 Photo scanner, which works very nicely with Linux.
I have noticed that photos that I scan in and then print don't look the same as the original. I am using Xsane, Gimp-Print, and CUPS. If it matters, the photo is 4x6 inches, scanned at 400 DPI, and printed in 1440x720 high quallity mode. The photo was originally printed from my 3 Mpixel digital camera (2160x1440 pixels), so I believe I've used a more than sufficient DPI when scanning.
I suspect the problem is that neither the scanner nor the printer is perfect, and that the cumulative effects of the transfer functions (scanner to computer to monitor to computer to printer) are causing this. Its actually worse if I let Xsane compensate for me with its automatic adjustments of gamma, brightness, and contrast. Adjusting the image on my monitor screen probably isn't going to help much since my monitor isn't perfect, nor is there any guarantee that I have it properly adjusted.
Is there any good way, other than trial and error, to fix this? Would generating some simple test patterns help in making the proper adjustments?
Thanks,
Andy
-- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA USA http://www.wlug.org
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