[filmscanners] Re: Why DSLR ouput looks sharper?

["David J. Littleboy" <davidjl@gol.com>]

"Nagaraj, Ramesh" <Ramesh.Nagaraj@ca.com> asks:
>>>>>>>>>>>
 Take a picture using 6MP DSLR at full resolution. Also scan a slide
 using 4000dpi scanner. Open both image files in Adobe and observe at 100%.

 Image from DSLR looks to have sharper edges compared to scanner output.
 What is the reason for this?
 Is it because of in-built sharpening of DSLR?
 <<<<<<<<<<<<<

It's because the digital image is sharper, cleaner, and better.

If your 4000 dpi scan is from a sharp slide, sharpen lightly, downsample to
2400 dpi, and sharpen lightly again. You should get an image that is almost
as good as the DSLR image and has a few more pixels as well.

(This works even better if you use the new version of Picture Window Pro's
Advanced Sharpen function, which includes Neat Image style noise reduction,
for the "sharpen lightly" steps.)

If your 4000 dpi scan is from a sharp _645_ slide, sharpen lightly,
downsample to 2800 dpi, sharpen lightly, downsample to 2000 dpi, and sharpen
lightly again. You'll get an image that is just as good as (if not better
than) any DSLR image, and has 13MP or so.

David J. Littleboy
davidjl@gol.com
Tokyo, Japan

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