Re: Measuring focus / sharpness

Posted by Andreas Maier on Jul 01, 2010; 7:08pm
URL: http://imagej.273.s1.nabble.com/Measuring-focus-sharpness-tp3687753p3687754.html

Hi,

usually you need an edge in the image to measure the "sharpness". Form
an edge you could estimate the modulation transfer function.
Do your images share a certain characteristic (as a certain edge) ?

Best,

Andreas

Am 7/1/2010 11:41 AM, schrieb David Faulstich Diniz Reis:

> Hi!
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> I want to know IF anyone already made na algorithm to measure the image´s
> sharpness.
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> I am trying to automatically apply an sharpness algorithm if needed.
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> Reading I discover that we need to discover the spatial frequency. Mesure
> high spatial frequency / low frequency, and based on this result, apply the
> sharpness algorithm.
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> Thank you in advance.
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> David
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> www.infosolo.com.br
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> [hidden email]
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> [phone]
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>    

--
Dr.-Ing. Andreas Maier
Stanford University
Department of Radiology
The Lucas Center for Imaging
Mail Code 5488, Route 8
Stanford, CA  94305
http://med.stanford.edu/profiles/Andreas_Maier/