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[OM] ( OM ) Evaluating colour in digital images

Subject: [OM] ( OM ) Evaluating colour in digital images
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
Date: Mon, 17 Jun 2002 10:53:07 +1200
Hi folk,

I wonder if any of you have faced and dealt with this problem.

When I scan images, they are always from prints, on a flat-bed scanner.

So I have no idea if the print-maker has the colour right. The scanning 
software and the post-scanning imaging software then throw a few wobblies 
into the image-making process. Not least of these is during the conversion 
from whatever patented format the program uses, to jpeg.

Another source of error arises in the colour temperature of the light I use 
when comparing the print with the on-screen image. Unless I have access to 
good daylight from a window to the side, I have only an incandescent bulb 
which emits light that is obviously yellow.

All of these things make it difficult to adjust the light level, the contrast 
and 
the colours on the digital image so that it represents the reality at the time 
of 
exposure.

What do you use for a white-light source?

Brian

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