I just scanned some pic of the Zilog Z8800. tried saving to gif = 3.4 megs same pic to jpg = 545 kbytes same 300 dpi. since there' small print, arrows, tables and if you scan at 200 dpi no one will be pleased with the pic. If you got bad eyes and try to enlarge the jpeg, you'll like it at 300 dpi , BUT hate it at 200 dpi.
Did you save it as B+W, 8 bit mono, or color?
-- Former professional electron wrangler. Michael A. Terrell Central Florida
greyscale , it dosen't look good as b/w.
I scan at 300 dpi monochrome and convert to .pdf files and I usually get a very readable datasheet that only takes about 50k-100k bytes a page. I use the Xsane driver scanner program under Linux, outputting Postscript and then distill the postscript to .pdf using the Ghostscript ps2pdf script. In tough cases, (Like old National databooks that are old, yellow and have a lot of print-through from the other side of the page) I have to scan as grey scale and convert to a monochrome using threshold function in The GIMP image manipulation program, manually finding the brightness range of black or white pixels.
The key is to use an "indexed" graphics format (gif, postscript, png) where there is a small pallette of colors/brightness, and have as few colors as possible. These formats are run length encoded where, if adjacent pixels are the same color, they just keep a count of them and the size of the data file depends on the number of changes in color. Having a greyscale picture with a lot of little variations in brightness balloons the file size right up there.
The .pdf format seems to yield the smallest monochrome files. .Png are a bit bigger. Then .gif, by a factor of about two or so. The programs for viewing .pdf files seem to have the best image scaling in them. Viewing a GIF on anything but some integer scaling factor can look real ugly if the people who write the viewer software didn't spend much effort on that.
Examples at ftp://ftp.eskimo.com/u/m/mzenier/
Mark Zenier snipped-for-privacy@eskimo.com Washington State resident
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