W3C home > Mailing lists > Public > www-style@w3.org > December 1995

Re: style sheet scalability (was: Specifying style notation in <link>)

From: Jacob Cazzell <jacobcaz@inetdirect.net>
Date: Tue, 5 Dec 1995 13:36:09 -0500
Message-Id: <v01510103630bff906bd4@[]>
To: marym@finesse.com (Mary Morris)
Cc: www-style@w3.org
>> Legibility should normally be increased with a larger display area,
>> assuming you don't get make the image too big for your display ;), as
>> long as the number of pixels you use on your screen is an integral
>> multiple of the number in the bitmap.

This would work although it would still be a bit rough.  It would look far
better than if the enlargment is *not* a multiple of the bitmap.

>OK. I'm confused here. It has been my experience that if you blow up
>a GIF image too much, the image loses quality due to the face that
>the image is a bunch of pixels being drawn absolutly. Text gets
>"jaggies" quickly under this scenario. That is why Postscript
>uses algorythms to scale text larger instead of just blowing up
>the pixels. I would assume that this would be true for many other
>image types as well. Highly ditherable but not already dithered
>images would benefit from being blown up better than others, but
>images that the designer dithers suffer from scaling problems.

Sure - postscript is a great fix to the 'jaggies' but there are other
methods of getting rid of 'em -- Photoshop is a great example of how to
enlarge and smooth at the same time.  Anti-alias it!  PS can use several
different schemes to "smooth" images and they all look pretty good.  What
about a built in anti-aliaser?  Dithering doesn't do much with how the
edges look -- it's a method for reducing colors or using fewer colors to
approximate a graident (or more colors than are present).

>Can you explain "how" legibility increases with significant size

If using a bitmap it won't -- it will only appear to be smoother with
significant size enlargments of a multiple of the bitmap size...  Whew, say
that five times fast! ;)

=B-)  Jacob Cazzell

|Jacob Cazzell                       | My name is Ozymandias, king of |
|jacobcaz@inetdirect.net             | kings:  Look on my works, ye   |
|http://www.inetdirect.net/jacobcaz/ | mighty, and despair!           |
Received on Tuesday, 5 December 1995 13:34:13 UTC

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