PIXEL
DIMENSIONS
are the horizontal and vertical measurements of an image expressed in
pixels. The pixel dimensions may be determined by multiplying both the
width and the height by the dpi. A digital camera will also have pixel
dimensions, expressed as the number of pixels horizontally and vertically
that define its resolution (e.g., 2,048 by 3,072). Calculate the dpi achieved
by dividing a document's dimension into the corresponding pixel dimension
against which it is aligned.

Example:

An 8"
x 10" document that is scanned at 300 dpi has the
pixel dimensions of 2,400 pixels (8" x 300 dpi) by 3,000 pixels
(10" x 300 dpi).

Reality
Check

What
are the pixel dimensions of a 5x7-inch photograph scanned at 400
dpi?

Answer
(check one):

Reality
Check

If
an 8.5x11-inch page is scanned and has pixel dimensions of 2,550
x 3,300, what is the dpi?