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Scanning Quality

The Perfection 3490 is a CCD scanner with a good optical system, so it can scan volumetric objects with a rather big depth resolution. This feature helps to create a sharp image of the centerfold of a thick book or magazine – for your character recognition software to process it without errors. Another application of this property may be to “photograph” volumetric objects. To check this out I put a few pens on the scanner’s glass and scanned them.


Volumentic objects scan

Well, scanning such objects is rather a purely theoretical test. Let’s see what we have with standard-type originals. First, let’s check the color restoration technology on a faded snapshot:


Without Color Correction


With Color Correction

Next you can visually evaluate the scans of two types of originals. The originals were KODAK IT8.7/2 Q-60 R2/E3A color targets. The scan parameters were set up according to the three basic modes: without color correction, with an ICM profile, and with automatic tone correction.


A scan of 35mm slide of the KODAK IT8.7/2 Q-60E3A target
in the Auto Exposure mode


A scan of 35mm slide of the KODAK IT8.7/2 Q-60E3A target
with an ICM profile


A scan of 35mm slide of the KODAK IT8.7/2 Q-60E3A target
with no color correction

 
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