Andy, I do quite a bit of photo work, using Photoshop on the Windows side of things for my art. I've found that each scanner has it's own constant way of skewing the image scanned. For example, on almost every image I scan on my HP 4100C, I first go and drop the Brightness by -10, and up the Contrast by +20 - +25. Since the Gimp is so closely aligned with Photoshop, I'm sure it is not hard to adjust these two characteristics of the image. Play with these to start with. I've seen drastic color improvements and dust/scratch removal just by up-ing the contrast. Maybe if you play with it across a few different images, you can find a few constant adjustments that can be made to each image, before you start getting picky and tweaking other things like Color Balance and such. Good luck! - Sands <x>< --- Andy Stewart <andystewart@attbi.com> wrote:
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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