Fiji: New Filter "Normalize Local Contrast"

Posted by Stephan Saalfeld on Jun 15, 2012; 1:18pm
URL: http://imagej.273.s1.nabble.com/Fiji-New-Filter-Normalize-Local-Contrast-tp4999077.html

Hi,

I added a new filter to Fiji:

Plugins->Integral Image Filters->Normalize Local Contrast

It adjusts local contrast resulting in an effect that superficially
reminds to CLAHE.  It is however solely based on block-statistics: mean
and STD, no histograms involved.  The nice point compared with CLAHE is
that each pixel is processed truly individually and still it is as fast
thanks to using integral images for calculating the block-statistics.

Do not forget to check the preview checkbox for testing.

I use the filter to correct for uneven illumination and to compensate
for artifacts that introduce a large contrast shift in 16bit images.  I
hope it's useful for somebody.

Best,
Stephan

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html