Images, DPI and PPI
Cre8asite member Frank Elley lays down the fundamentals of images, DPI and PPI — and the differences between print and Web — in the thread showing images in actual size. Good reading; non-headache-making.
So: DPI describes the resolution of printers. PPI describes the density of pixels within a graphic file format. The act of printing is the act of mapping the PPI of the graphic to the DPI of the printer.
Update: another Frank Elley post re DPI resolution for print.
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