[Insight-users] Histogram equalization
Radhika Sivaramakrishna
radhika.sivaramakrishna at synarc.com
Mon, 1 Mar 2004 11:58:50 -0800
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Hi Luis,
Although it is often used for better visualization, I think having a
histogram equalization filter is definitely useful. For example for
preprocessing images for better contrast prior to other filters. So I think
it would be good to have this tool.
Radhika
-----Original Message-----
From: Luis Ibanez [mailto:luis.ibanez at kitware.com]
Sent: Saturday, February 28, 2004 8:34 AM
To: Radhika Sivaramakrishna
Cc: 'insight-users at itk.org'
Subject: Re: [Insight-users] Histogram equalization
Hi Radhika,
There is no Histogram Equalization filter in the Toolkit.
Note that HistogramEqualization is mostly a visualization
technique rather than something you want to use for image
analysis.
The closest thing available in the toolkit is the Histogram
Matching filter that will modify the histogram of an image
in order to match the histogram of another image.
http://www.itk.org/Insight/Doxygen/html/classitk_1_1HistogramMatchingImageFi
lter.html
This is sometimes used for image registration.
Could you describe in more detail your motivation for
performing histogram equalization ?
Thanks
Luis
---------------------------------
Radhika Sivaramakrishna wrote:
> Hi Luis,
> Is there already a filter for Histogram Equalization?
> Radhika
>
>
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<P><FONT SIZE=3D2>Hi Luis,</FONT>
</P>
<P><FONT SIZE=3D2>Although it is often used for better visualization, I =
think having a histogram equalization filter is definitely useful. For =
example for preprocessing images for better contrast prior to other =
filters. So I think it would be good to have this tool.</FONT></P>
<P><FONT SIZE=3D2>Radhika</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Luis Ibanez [<A =
HREF=3D"mailto:luis.ibanez at kitware.com">mailto:luis.ibanez at kitware.com</=
A>] </FONT>
<BR><FONT SIZE=3D2>Sent: Saturday, February 28, 2004 8:34 AM</FONT>
<BR><FONT SIZE=3D2>To: Radhika Sivaramakrishna</FONT>
<BR><FONT SIZE=3D2>Cc: 'insight-users at itk.org'</FONT>
<BR><FONT SIZE=3D2>Subject: Re: [Insight-users] Histogram =
equalization</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Hi Radhika,</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>There is no Histogram Equalization filter in the =
Toolkit.</FONT>
<BR><FONT SIZE=3D2>Note that HistogramEqualization is mostly a =
visualization</FONT>
<BR><FONT SIZE=3D2>technique rather than something you want to use for =
image</FONT>
<BR><FONT SIZE=3D2>analysis.</FONT>
</P>
<P><FONT SIZE=3D2>The closest thing available in the toolkit is the =
Histogram</FONT>
<BR><FONT SIZE=3D2>Matching filter that will modify the histogram of an =
image</FONT>
<BR><FONT SIZE=3D2>in order to match the histogram of another =
image.</FONT>
</P>
<P><FONT SIZE=3D2><A =
HREF=3D"http://www.itk.org/Insight/Doxygen/html/classitk_1_1HistogramMat=
chingImageFilter.html" =
TARGET=3D"_blank">http://www.itk.org/Insight/Doxygen/html/classitk_1_1Hi=
stogramMatchingImageFilter.html</A></FONT>
</P>
<P><FONT SIZE=3D2>This is sometimes used for image registration.</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Could you describe in more detail your motivation =
for</FONT>
<BR><FONT SIZE=3D2>performing histogram equalization ?</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Thanks</FONT>
</P>
<BR>
<BR>
<P><FONT SIZE=3D2> Luis</FONT>
</P>
<BR>
<BR>
<BR>
<P><FONT SIZE=3D2>---------------------------------</FONT>
<BR><FONT SIZE=3D2>Radhika Sivaramakrishna wrote:</FONT>
</P>
<P><FONT SIZE=3D2>> Hi Luis,</FONT>
<BR><FONT SIZE=3D2>> Is there already a filter for Histogram =
Equalization?</FONT>
<BR><FONT SIZE=3D2>> Radhika</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT =
SIZE=3D2>>  =
;  =
;  =
;  =
; </FONT>
<BR><FONT SIZE=3D2>> =
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sp; &nb=
sp; &nb=
sp; &nb=
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