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Re: ATM "Focaultgrams" images

To: Ricardo Dunna <rdunna@apit.furnas.gov.br>
Subject: Re: ATM "Focaultgrams" images
From: Ken Lowther <s0109366@cc.ysu.edu>
Date: Thu, 18 Sep 1997 13:36:08 -0400 (EDT)
cc: atm@shore.net
In-Reply-To: <199709181655.NAA09665@apit>
Reply-To: Ken Lowther <s0109366@cc.ysu.edu>
Sender: owner-atm@shore.net

On Thu, 18 Sep 1997, Ricardo Dunna wrote:

>    It was about a 28 cm , 20mm thick tabletop glass, taken with 150 mm
> telephoto lens. All surface details are easily visible and were enhanced
> with unsharp masking.

I have tried putting the knife edge in front of my camera lens, but have
never been able to get any detail from the test.  What is unsharp masking.

Ken Lowther  
s0109366@cc.ysu.edu
Youngstown, Ohio  USA

References:
- ATM "Focaultgrams" images
  - From: Ricardo Dunna <rdunna@apit.furnas.gov.br>

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