Snap logic tells me that downsampling an image should not degrade that image in any way, but is that the real story? Get theoretical if necessary and help me put this to rest.
David, if I am reading your article correctly, downsampling DOES result in image degradation. Just to make sure, let me ask the question another way, if I scan a piece of film at 2000 dpi and downsample the file to 1000 dpi (no USM or other adjustments), how would it compare to a scan of the same film made at 1000 dpi to begin with?
The question arose during a conference with a client who will be having a number of large scans made for a specific large format output project. They will want to repurpose the scans (obviously) for more conventional output. Some repair and composite work will be done to the images which would be impossible to duplicate on multiple res versions of the same image. Even if retouching were not an issue, I think most people would assume that "scan high and downsample" is the way to go, especially when shooting digital originals.
Keith, Snap logic is knee jerk of the brain. Think "snap judgement".
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