PPI and DPI - Great confusion

greenspun.com : LUSENET : Imaging Resource Discussion : One Thread

When discussing PC monitor resolution everybody refers to 72 ppi resolution. How comes? Most modern monitors have from 640 by 480 pixel to 1200 by 800 pixels and larger desktop areas. So, resolution should be different for those various monitor settings. Also, what is the correlation between monitor resolution and monitor dot pitch?

Can anybody provide the source for a good article that explains the differences between ppi and dpi. It seems that some authors don't understand this issue thus creating more confusion with their articles.

-- Bork Mulnik (neslonik@aol.com), March 02, 2000

Answers

dpi and ppi are the same thing! dpi is dot per inch, and ppi is pixel per inch. Pixel, Dot.....just nomenclature differences.

Monitor resolution is just the actual pixel width and height divided by the width and height of the monitor in inches, thus 72 ppi, or dpi.

-- Jason Kirk (jasonkirkphoto@hotmail.com), March 02, 2000.


Moderation questions? read the FAQ