According to Scott Kelby, in PS CS (re: ISBN 0-7357-1411-8), in
"downsizing" an image, one should turn off the "resample image"
option in the Image Size dialog box. In "upsizing" an image, one
should leave the "resample image" on (bicubic smoother, say), but
increase the size by no more than 10 percent at a time, applying that
formula repeatedly until the desired size is reached. He offers no
explanation for this magical formula but asserts that it works,
attributing the magic to the gurus at PS. Presumably, the final
result can be saved for whatever purpose one desires. He asserts
that this way, one can create a "poster size" image from a 3.2
megapixel digital image with little loss in definition. In the book
referenced, he shows the result of taking a 4.75" X 4.75" image to
20" X 20" with little loss of quality.
Roger
Roger Eichhorn
eichhorn@xxxxxx
