Posted by
Michael Schmid on
Aug 22, 2011; 12:29pm
URL: http://imagej.273.s1.nabble.com/Leveling-Image-tp3683357p3683363.html
Hi Ahsan,
your image looks like an application for Process>FFT>Bandpass filter
with only "Remove Stripes" with a small low angular tolerance and an
infinite bandpass ('Small structures:' 0, 'Large structures:' An
number much larger than the side length of the image in pixels, e.g.
1e6.)
It is best to convert the image to float (32 bit) before, then you
can disable the 'autoscale' and 'saturate' options.
This filter essentially subtracts a line-by-line background.
For some scanning probe microscopy images an even better option would
be to subtract not the mean but rather the median of each line (after
subtracting a plane); maybe someone knows about such a plugin.
Michael
________________________________________________________________
On 22 Aug 2011, at 12:34, ashamim wrote:
>
http://imagej.588099.n2.nabble.com/file/n6710969/sample.jpg>
> Gabriel
>
> Thank so much for the reply. I really appreciate that. I have
> attached the
> sample image. The image on the left is what I have and the image on
> the
> right is what i want. Beside the contrast of the image there are
> prominent
> lines in horizontal direction (dark) in the image on the left.
> These are the
> lines because of the different levels.
>
> Regards
>
> Ahsan
>
>
> -----
> Ahsan
> --
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