Re: 32-Bit Tiff Single Pixel Noise Removal

Posted by Michael Schmid on Feb 03, 2015; 2:16pm
URL: http://imagej.273.s1.nabble.com/32-Bit-Tiff-Single-Pixel-Noise-Removal-tp5011416p5011420.html

Hi Francis,

it depends what you want to do with the images. If the pixel intensities are not important (e.g. you only want to detect the position of the elliptical areas) the easiest would be using the logarithm of the image (Process>Math>Log).

I don't think that the excessively high pixel values are noise. Essentially all of the structure in the image seems to be made of streaky features similar to the very bright 'noise'.

Michael
________________________________________________________________
On Feb 3, 2015, at 03:26, Francis OBrien wrote:

> Hi,
>
> I need to remove single pixel noise from 1000's of 32-bit TIFF images. I tried to use the outlier process but its not working as I have to manually set the threshold. I think I need to automatically apply a known 95 or 99% threshold to the minimum and maximum of the histogram data before I can properly visualize the images.
>
> I am attaching an example of the type of image and its histogram. I hope someone on the list could advise on a batch type macro that could solve this problem.
>
> Best,
>
> Francis

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