In a message dated 12/4/2001 2:07:36 AM EST, julianv@mindspring.com writes:
> Here are two sample scans (one from VueScan, one from Nikon Scan) that
> show the benefit of a manually selected focus point:
>
> <>
No, there are too many other differences for this to be a useful
test. It isn't clear if sharpening has been applied to the NikonScan
result, and the range of intensities is different in the NikonScan
and VueScan images which makes them look different.
A more useful test would be to first use the Advanced Workflow
suggestions to lock the exposure, film color and image color.
Set "Device|Auto focus" to "Scan" and scan the whole slide.
Then crop to a smaller area and scan again with auto focus
on the smaller area. Then change "Device|Auto focus" to
manual and manually offset the computed focus value by some
numbers while scanning the smaller area.
You'll probably be able to come to some useful conclusions
using this test.
Regards,
Ed Hamrick
