3.5 floppy imaging

Paul Koning paulkoning at comcast.net
Mon May 18 14:57:12 CDT 2015

> On May 18, 2015, at 3:36 PM, Fred Cisin <cisin at xenosoft.com> wrote:
> ...
> (and, of course, I have encountered academics who would rather scan a photograph at 200dpi and then store with LOSSLESS compression rather
> that a scan at 1200DPI stored with LOSSY compression)

And, depending on the source material and intended usage, that may be the correct decision.  The 1200 DPI JPEG scan will have compression artifacts, which may corrupt the image to the point that its intended use can no longer reliably be achieved.  Or it may be, provided the compression parameters are set correctly.  By contrast, scanned images stored with lossless (or, equivalently, no) compression have properties that are likely to be better understood and more consistent.  If you’re doing astronomy, or radiology, or other activities where small spots on the image have meaning, this sort of thing may well be important.


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