Re: Focus measurement (more general image analysis question)

Posted by Filip Rooms on Mar 07, 2007; 4:48pm
URL: http://imagej.273.s1.nabble.com/Focus-measurement-more-general-image-analysis-question-tp3700123p3700138.html

Just a quick idea: what about a histogram of gradient intensities
(possibly at a few different scales)?

A blurred image won't have any sharp edges, thus producing a histogram
with only low gradient values. An image which doen contain sharp
features will have at least a few high intensity gradients, so this
histogram will look different.

Add some denoising routine maybe to eliminate high gradient
intensities due to noise...

Kind regards,

Filip