Re: flexfax: Fax Quality Not Consistent

[Nico Garcia <raoul@cirl.meei.harvard.edu>]

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On Tue, 30 Dec 1997, CN Liu wrote:

> Hi! All,
> 
> I need your help to improve the fax quality.
> 
> The server: Hylafax 4.0p11 under Linux 2.0.32 with gcc 2.7.22 and ZyXEL
> U-1496E. gs3.33,fonts-3.33,jpeg-5a are used.

First gentle suggestion: upgrade your ghostscript to version 5.10,
available at ftp:://cs.wisc.edu/pub/ghost/aladdin/current/

> The client software is Whfc 0.5 running in Windows 95 Traditional Chinese
> version (4.00.950). The client printer driver is HP 4/4M Postscript.
 

Second suggestion: use the Apple Laserwriter driver instead of the 4M
postscript. Various chunks of Microsnot software interact poorly with
various funky Microsnot print drivers, in my experience, and I find
that the Laswerwriter driver is much more reliable in producing
simple, legible output for *all* uses.

> The qualities of the fax differ from sources to sources: documents of
> Word97,IE3.02, and Powerpoint97 are fair but documents of EUDORA 1.5.4,
> Excel97 are poor. The term "poor" means that the characters are too light
> (some pixels are missing). Enlarging the font size does not improve the fax
> quality because the missing pixels in the documents of larger font size may
> appear in those document of smaller font size, and vice versa. 
 
You might try using "fine" mode, 196 dpi, instead of the standard
"low" mode of 96 dpi. But it sounds like a font or ghostscript
problem, since it seems associated with specific characters.

What happens if you change the font to something else? Which one are
you using, and what happens if you examine the plain Postscript with
ghostscript on your computer screen?

			Nico Garcia
			Engineer, CIRL 
			Mass. Eye and Ear Infirmary
			raoul@cirl.meei.harvard.edu

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