On Thu, Aug 13, 2009 at 10:59:18AM +1200, Richard Mason wrote: > >> >My question to you is why a box of 100px equals a inch > >> measured by a > >> >ruler and not what I expected 96px? > >> > > >> Don't understand the statement.
> I didn't make clear what I meant when I said "I don't understand the > statement". I was querying why he would expect a 100px box to be 96px. You misunderstood what the questioner was expecting. He didn't mean that he expected 100px to be 96px. His question was "My computer is set to 96DPI, so I expected a 96px line to be one inch when measured by a ruler, but, instead, 100px is an inch. Why is that?" You and I (and a couple others) have already answered that question quite thoroughly, so there should be no need to answer it again; I just wanted to clarify that he didn't mean that he expected 100px to be 96px. Overall, though, I have to agree with one of your later posts: > but why, generally, would anyone want to do that? A monitor is not a > sheet of paper and the distance and orientation one reads text on > paper is quite different to that at which one reads text a screen. I've never really understood graphics software's obsession with DPI. As already noted by someone else in this thread, a 100x100px image saved at 300DPI and a 100x100px image saved at 72DPI are *exactly the same image*. There is no difference other than the value of a header field whose sole purpose is to store the creator's declared DPI-by-fiat and has no actual effect on how the image is displayed. But, then, my background is in software development, not print design, so I think about on-screen image sizing purely in terms of pixels and find the idea of trying to size things on-screen based on inches or any other physical measurement to be silly, at best. For someone coming from a background in print design, I can certainly understand why there would be a tendency to think in terms of physical units (even if it is nonsensical when talking about on-screen display by the general public). -- Dave Sherohman ______________________________________________________________________ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
