Re: quick way to select the maximum pixel

Posted by Michael Schmid on Oct 08, 2009; 8:02am
URL: http://imagej.273.s1.nabble.com/quick-way-to-select-the-maximum-pixel-tp3690812p3690815.html

Hi Jacqueline,

it seems you are talking about hot pixels (pixels that appear as too bright).

You can try Ptocess>noise>Remove Outliers. It is a median filter with a
threshold; i.e., pixels that deviate by more than a given value from the
median of the neighborhood are set to the median.

Michael
__________________________________________________________________


On Wed, October 7, 2009 22:55, Jacqui Ross wrote:

> Hi All,
>
> I have a related question to the previous email about finding the
> maximum grayscale pixels.
>
> We recently discovered a couple of dead pixels in our monochrome camera.
> They only show up when people have very very low intensity labelling and
> are using long exposure times so normally not a problem.
>
> However, it was suggested to me that to eliminate them from the images,
> I could "find" the dead pixels (since they are maximum intensity) and
> then fill them with the average grayscale value of the background (I
> guess the minimum?).
>
> Can anyone offer me some suggestions on how to do this?
>
> Kind regards,
>
> Jacqui
>
> Jacqueline Ross
>
> Biomedical Imaging Microscopist
> Biomedical Imaging Research Unit
> School of Medical Sciences
> Faculty of Medical & Health Sciences
> The University of Auckland
> Private Bag 92019
> Auckland, NEW ZEALAND
>
> Tel: [phone] Ext 87438
> Fax: [phone]
>
> http://www.fmhs.auckland.ac.nz/sms/biru/
>