__/ [pravesh.subramanian@xxxxxxxxx] on Thursday 01 September 2005 17:33 \__
> Hello group,
> This is my first message. I have MRI Images and want to do
> inhomogeneity correction on them.
> How can I:
> 1. determine the noise in the images using Histogram?
A histogram might help in detecting salt-and-pepper noise in the case of MRI
images. It is not, however, a robust method for solving such a task. I
suspect that the dark background and the light ventricles might pose a
problem. Consider using localised histograms, i.e. histograms which treat
smaller portions of the images in question.
> 2. perform gaussian smoothing on the image? can anyone give me the
> function for a gaussian kernel?
Which programming language?
> 3. normalize this image?
Ditto. There are some MATLAB implementations in MATLAB Central and VXL <
http://vxl.sourceforge.net/ > provides C/C++ equivalents.
> Thanks in advance for the help!
Hope it helps,
Roy S. Schestowitz | "How do I set my laser printer on stun?"
http://Schestowitz.com | SuSE Linux | PGP-Key: 74572E8E
5:40pm up 8 days 8:11, 3 users, load average: 0.42, 0.27, 0.29