AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2002.09.19 07:33 "Correct way of creating CMY TIFF file ?", by Graeme Gill
2002.09.19 11:03 "TIFF Curious", by Mike Southern
2002.09.19 15:26 "Re: TIFF Curious", by Chris 'Xenon' Hanson
2002.09.19 17:11 "Re: TIFF Curious", by Leonard Rosenthol
2002.09.30 22:31 "Compile LibTIFF for Mac -- configuration", by Chris 'Xenon' Hanson
2002.09.19 19:08 "Re: TIFF Curious", by Peter Montgomery
2002.09.19 19:26 "Re: TIFF Curious", by Joel Schumacher
2002.09.20 12:54 "Re: TIFF Curious", by Martí Maria
2002.09.19 14:35 "Re: Correct way of creating CMY TIFF file ?", by Dwight Kelly
2002.09.19 15:00 "Re: Correct way of creating CMY TIFF file ?", by Jim Schueckler
2002.09.19 15:25 "Re: Correct way of creating CMY TIFF file ?", by Dwight Kelly
2002.09.30 21:46 "Re: Correct way of creating CMY TIFF file ?", by Chris Cox
2002.10.01 01:09 "Re: Correct way of creating CMY TIFF file ?", by Graeme Gill

2002.09.19 19:08 "Re: TIFF Curious", by Peter Montgomery

Mike,

I'm not entirely sure what you're looking for. You say you basically decrease the gamma before entering the image into a database. Okay, then you just need to write a program that will read an image, perform gamma correction on it, and then save the image. This is pretty basic stuff and shouldn't take you too long to write. Why use PhotoShop at all if that's what you're doing? Another poster mentioned CMYK, but I noticed that you didn't mention it anywhere in your post. I guess he assumed that you needed that since you are involved in printing, but is that the case or does your database store the images as RGB? What exactly are the steps you do from reading an image to entering it into the database?

    Thanks,
    PeterM

Good mornng

I work with TIFF files from completely the opposite end from most people I read here. I just place them on a page, in magazines.

Actually, I place JPEGs, as the magazines are USA National car ad magazines, and so we have huge collections of classified and dealer adverts.

We have image capture and databasing techniques based around a cross-platform database engine, and one of the processes we perform on the images is to enhance the contrast of the image. We do this after the image comes off the digital camera card, and before it is placed in the database. We process in Photoshop, using custom actions, and a set of adjustments set using the Intellihance plugin.

The image adjustment is basically to decrease the gamma to compensate for over-inking on the press (because we are not printing on good paper, the dot gain is high). There are also similar adjustments if the pic is colour.

The cost of using Photoshop is high - not only financially (72 copies in my region) - but more importantly we pay a price for flexibility. The original system was designed using Photoshop 5. Photoshop 6 didn't understand some of the actions, sowe had to rewrite. There were other problems.

It would all be a lot easier to control if we could do away with Photoshop for this process, and have something more automated and still controllable that would perform the same task.

I would be interested in your collective thoughts and observations.