I have performed some experimentation with xsane, as I was wondering why
the Copy feature was taking so long.
My setup is an Epson Perfection 1200S scanner (1200 dpi), and a Hewlett
Packard LaserJet 6MP printer (600 dpi postscipt).
Using xsane, version 0.58, I performed the following tests, scanning
greyscale of an A4 page. All scans at 200 dpi
Copy/Scan filetype filesize Printsize
Copy -------- 65.9Mbytes
ps 7.4Mbytes 7.6Mbytes
jpeg 302kbytes
png 501kbytes 4.8Mbytes
pnm 3.8Mbytes
tiff 552kbytes 4.7Mbytes
I made the initial mistake of using xv to print the jpeg files, which while
producing a printfile of only 848.3kbytes, there was a loss of quality.
The tiff and png printsizes were obtained using gimp.
The 200dpi postscript file was virtually identical to the Copy image.
Question - why does xsane send such a large file to the printer in the
Copy mode. The ideal while scanning greyscale would seem to be to scan
at third resolution of the b/w printer. Even scanning at 600 dpi to a
postscript file produces a file of 31.8Mbytes.
I tried using xsane within Gimp, but the image was smaller - why?
Regards
Harry
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