Detail from Downtown Images


Downtown at 1x

This is typical of output from a good scanner without multi-sampling.  Noise appears in darkest areas.

Downtown at 16x

At 16x columns in lower-right of image appear clearer.


Downtown at 16x with 40% An. Gain  

CCD scanned, also at 16x.

The histogram for this picture was shifted to the left.  Increasing the analogue gain to 40% mapped the image into the scanner's entire tonal space, which resulted in imaging more detail.



Below, same as previous, but scanned at 2700 dpi.

Downtown at 16x with 40% An. Gain, 2700 dpi
Downtown S3900

The drum scanner version.  Detail in lower-right jumps out.