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Re: [css3-page] LCWD issue 22 -- [22] Section 3.3.2 <length>

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Wed, 18 Feb 2004 01:36:34 -0600
Message-ID: <40331602.5060400@mit.edu>
To: David Woolley <david@djwhome.demon.co.uk>, www-style@w3.org

David Woolley wrote:
> That's not my understanding.  My understanding is that a pixel is a real
> pixel at typical CRT resolutions (so that bit mapped images align on
> pixels) but is based on a arbitrary number of pixels per inch on high
> resolution mediums.

Not quite arbitrary.  "It is recommended that the reference pixel be the 
visual angle of one pixel on a device with a pixel density of 96dpi and 
a distance from the reader of an arm's length. For a nominal arm's 
length of 28 inches, the visual angle is therefore about 0.0213 degrees."

So we are in fact taking "96dpi" to be the standard "typical computer 
display" resolution.

Received on Wednesday, 18 February 2004 02:36:37 UTC

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