Bob Williams wrote:
> The popular wisdom is that a flatbed scanner is no match for a good
> Digicam as regards resolution, color purity, density range etc., etc.
> I think this must be qualified. It depends on what the subject is.
> I think that a large continuous tone subject like an 8 x 10 oil
> painting, scanned at 600 dpi on a good consumer flatbed will produce a
> better image than that from a good 6-8 MP digicam, including a DSLR.
> The scanner image will be 28.8 MP whereas the camera image will be only
> 8 MP. Even taking into consideration, the pixel sensor's alleged
> superiority of "Pixel Quality", I think that the vastly larger number of
> pixels from the scanner will trump the camera sensor's quality.
> Has anyone made this test? What did you find?
> Bob Williams
>
I'm not sure the popular wisdom has a concensus on this. However,
regardless of the object, resolution and density range are objective,
measurable quantities.
Now, there are many ways to measure or specify resolution. To me,
measured resolution is the only one that counts. One can make umpteen
samples per inch, but if the optics are crummy, or the detectors have a
lot of crosstalk, or there is a lot of scattering, the measured
resolution will not come anywhere near the sampling pitch, whether it be
a camera OR a scanner. Density or dynamic range is similarly objective.
Color purity is a bit funnier, and more open to interpretation.
>> Stay informed about: Scanner vs Camera. 
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