I was informed that using software to increase the number of pixels in a 4000
dpi slide scan would bring the scan's
resolution closer to matching the actual appearance of the slide and
demonstrate how close 4000 dpi comes to capturing all the information present
on the film. I tried it, and it's true.
Click the links below to see comparisons between
the unaltered 4000 dpi scan, the scan upsampled 200%, the scan upsampled 400%,
and the actual appearance of the Kodachrome and Velvia slides as-seen through a
microscope. After upsampling, the 4000 dpi scan comes very, very close to
showing all the information present in the film images.
Note that I have not included images from the Kodachrome scan because the
Kodachrome scanned so poorly.
Click on the highlighted area in the image of the slide below to download a
361K .tif file cropped from
the original scan of the Velvia slide. This crop is unaltered and represents an
area on the film of 1/8" x 3/32" (3.2mm x 2.4mm).
