RE: graphics

Subject: RE: graphics
From: "Fred Ridder" <docudoc -at- hotmail -dot- com>
To: lhickling -at- Express-Scripts -dot- com, techwr-l -at- lists -dot- techwr-l -dot- com
Date: Tue, 02 May 2006 15:12:46 -0400

Actually, you lose the font outlines as soon as the graphic is handled
as a raster image. Raster images are nothing more nor less than
complex patterns of dots; the notion of lines or curves or font
outlines as entities has no meaning in the raster world.

When you're working with a vector drawing program, the font outline
information is lost as soon you save the drawing in a raster image
format like TIFF or GIF or PNG or BMP or JPEG. The only way to
preserve the font outlines is to save the drawing in a vector image
format like the application's native file format or a vector metafile
format like EPS, PDF, SVG, WMF, or EMF if you need the image to
be portable.

If you're talking about screen captures, the font outlines are lost
at the very beginning of the process by the code that renders the
screen display (whether that code is in the app or part of the OS).
Monitors are raster devices and only know about patterns of dots.

One further disadvantage of JPEG for line art or screen shots that
Joe didn't mention is the fact that its area-based compression
algorithm invariably produces artifacts near abrupt color transitions
(which pretty much defines text and most line art. Depending on
the compression setting, you'll see some amount of gray "smudginess"
surrounding the letters in a block of text and alongside lines in a
drawing. When you read a newspaper, you can always tell which
advertisers foolishly used a JPEG file to supply their logo or artwork.
It's simply the wrong format for that job.

My opinions only; I don't speak for Intel.
Fred Ridder
Parsippany, NJ

From: "Hickling, Lisa (TOR)" <lhickling -at- Express-Scripts -dot- com>
To: "Joe Malin" <jmalin -at- tuvox -dot- com>,"Techwr-L" <techwr-l -at- lists -dot- techwr-l -dot- com>
Subject: graphics
Date: Tue, 2 May 2006 12:24:17 -0500

As usual, you nailed that differentiation, Joe. My pain is still fresh
from looking at GIF captures that WWeP auto-converted to JPEG. None of
the labels are legible since JPEG lost the font outlines in the

Whose idea was it over there at Quadralay to default anchored frame
contents to JPEG? No offence to my fellows who capture colour-rich
graphics all day but (dare I say) most of us are into screencaps. So,
show me the GIFs!

Lisa H.

-----Original Message-----
From: techwr-l-bounces+lhickling=express-scripts -dot- com -at- lists -dot- techwr-l -dot- com
[mailto:techwr-l-bounces+lhickling=express-scripts -dot- com -at- lists -dot- techwr-l -dot- co
m] On Behalf Of Joe Malin
Sent: Tuesday, May 02, 2006 12:53 PM
To: obair81 -at- comcast -dot- net; techwr-l -at- lists -dot- techwr-l -dot- com
Subject: RE: graphics

Others have explained why and when on this, but I thought I should add
some background:

We refer to JPEG and GIF formats as "lossy" because they discard pixel
information during compression. These formats assume that the viewer
won't notice the discarded information, any more than a newspaper reader
will notice that the rendition of a color photograph in a newspaper
isn't the same as the photograph itself.

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graphics: From: Hickling, Lisa (TOR)

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