At 04:24 4/18/01, Dave Dougherty wrote:
What scan rate are most using for TOPE? If I scan a photo at much over
100dpi it is too large to see on screen. I am still pretty ignorant as to
how to overcome this issue, but when I look at some of the new photos in TOPE
5 I am jealous. I am especially struck by how sharp #22 is. My submission
is as sharp in the original photo, but loses something in the scanning. Any
input would be appreciated. Thanks.
Dave Dougherty
Dave,
Mine was done from a Kodak Photo CD created by a pro lab. Scans are done
from the film (in most cases transparency) and the pixel dimensions are
3072 X 2048 . . . for a 4x6 print that translates to 512 dpi on a
flatbed. Last step after adjusting contrast and color balance from the
scan to bring it back to the transparency is a combination of sharpening
using an "unsharp mask" algorithm, resizing to 639x426 pixels (if it's
still a 3:2 aspect ratio) using a smoothing algorithm, and then sharpening
again using an "unsharp mask." The level of sharpening done the second
time depends on how sharp the image is following the resizing.
-- John
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