RE: FM8 screenshot compression problem

Subject: RE: FM8 screenshot compression problem
From: Fred Ridder <docudoc -at- hotmail -dot- com>
To: Bill Swallow <techcommdood -at- gmail -dot- com>, Rédactrice Technique <redaqtechnique -at- gmail -dot- com>
Date: Fri, 16 Nov 2007 14:51:53 -0500

Bill Swallow wrote this in response to Rédactrice Technique:
> Do they look bad in FrameMaker or in your final output? FrameMaker
> will just show thumbnails, or low resolution images while you're
> working. Resizing your images using PhotoShop will only garantee you
> one thing - that your images will never be as crisp or clean as they
> were when you shot them. All physical resizing of screenshots causes
> image distortion.

It might be worthwhile to make a distinction here between resizing
and rescaling.

The resizing that Bill refers to as inevitably degrading the image
is any approach that changes the pixel dimensions of the image.
Any process that changes the number of pixels has to resample
the image, averaging adjacent pixels together, either to eliminate
some number of pixels (to make the image smaller) or insert
interpolated pixels that didn't exist begfore (to make the image
larger). It's obvious that such an approach will have nasty
consequences when adjacent pixels are of significantly different
color values, as will be the case with text objects or the edges
of GUI elements in a screenshot.

When I refer to rescaling, I'm talking about changing the dpi
value in FrameMaker, which neither throws away nor creates
image pixels and is therefore a lossless process. The onscreen
display may suffer, but the printed output--whether to hard
copy or to PDF (as long as you have the right job options
settings for Distiller)--should be fine.

Fred Ridder

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FM8 screenshot compression problem: From: Rédactrice Technique
Re: FM8 screenshot compression problem: From: Bill Swallow

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