On Jun 15, 2006, at 5:21 PM, Don Sanderson wrote:

> Thanks, that's what I _thought_ it meant! ;-)
> Visual acuity, or, the amount of visible detail in a photo
> would be practical terms for it.

Well, spatial resolution is certainly related to visual acuity  
(acutance more precisely, I think) but SR is an image property  
independent of perception and VA has to take perception into account.  
A lot of seeming sharpness in a photography comes from how well our  
eye/brain recognizes and follows edges, not from actual resolution.

> You're explanations are very good, even though complex for a novice.
> Have you taught mathmatics somewhere?

My degree is in Mathematics; I taught the subject as part of my  
college course work for two years. But I think I got a lot of  
practice explaining complex topics like this during the years I spent  
doing engineering support to the third party development community at  
Apple Developer Relations.

Godfrey

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