RE: Why JPGs for screen captures? test results

Subject: RE: Why JPGs for screen captures? test results
From: "Sean Brierley" <sbri -at- haestad -dot- com>
To: "TECHWR-L" <techwr-l -at- lists -dot- raycomm -dot- com>
Date: Thu, 27 Feb 2003 10:47:06 -0500


EMFs reference fonts, they don't embed them like EPS does. Furthermore,
I have found some display discrepancies with complex vectors, though it
is a better format than WMFs which (I believe) uses short straight
segments for some splines and curves. I have had font spacing, kerning,
and other issues with fonts in EMF that were converted to curves, too.
Finally, it's Windows only.

The only problem I can think of with PNGs is that they don't support
CMYK color. I believe--don't know for absolute certainty--that they
support RGB+transparency. I use PNGs for my online help output. They
work fine. PNG is a raster format, btw.

Cheers,

Sean

-----------------------------------------
Sean Brierley
Software Documentation Specialist
Haestad Methods
http://www.haestad.com
203-805-0572 (voice)
203-597-1488 (fax)



-----Original Message-----
From: DGoldstein -at- DeusTech -dot- com [mailto:DGoldstein -at- DeusTech -dot- com]

Two questions for Sean re the following snips from his separate posts:

> What you should do is print PDF from Visio using the Distiller printer
> (you need Acrobat for this) and then Save the PDF as EPS. Otherwise,
> maybe EMF will do in a pinch (Visio really needs some work in the
> EPS-creation dept.)

1. Why only "in a pinch"? What's the disadvantage in working with EMFs
for
vector images?

> Non-lossy compression is used in things like PNG, where the
compression
> algorithm does not discard data from the file.

2. Is there *any* disadvantage in using PNGs for raster images?

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