[filmscanners] Re: PS sharpening

["Anthony Atkielski" <anthony@atkielski.com>]

I use a setting of 98 with 0.7-pixel radius and threshold of 2.  If you are
downsampling, downsample in steps of 2x (half, half, etc., until you reach
your final size) and unsharp mask with these parameters after each step
(except the last, if it is substantially less than 2x).  Alternately, you
can reset the parameters for the unsharp mask to match the total
downsampling ratio (radius equal to just slightly less than the total number
of pixels lost), but I don't have much experience with that method.

Note that you may have to reduce these values for very small image sizes,
and increase them somewhat for very large sizes, depending on image detail.

----- Original Message -----
From: "Alex Zabrovsky" <alexz@zoran.co.il>
To: <anthony@atkielski.com>
Sent: Wednesday, August 07, 2002 18:55
Subject: [filmscanners] PS sharpening


Hi.
I would be interested to know how people use Unsharp Mask in PS to make the
images sharper, especially following high settings of GEM (produced by Nikon
IV ED)
I'm still trying to establish the range of best Unsharp Mask settings for
different cases (scenic, portraiture and other kinds).
Let's assume the scanning resolution is 2900 dpi  and 1000 dpi.

Regards,
Alex Z

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