HP psc 2175 scanner curiosity

Hi..

My HP psc 2175 printer/scanner seems to be working
perfectly, but I'm a
little concerned.  With xsane, I scanned a normal page at
200dpi and
full color, and then, inside xsane, zoomed into the picture
at 400%.  

The problem is there seems to be jpeg-like artifacts around
the letters!
What is going on?  Is the scanner sending jpeg data over the
usb link,
or is there a conversion step to jpeg and back behind the
scenes?  Does
this happen with all scanners?

(I'm using Fedora 6.)

Thanks!
-- 
PF <sanedevelch.pkts.ca>


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