[Insight-users] ITK for 3D range data

[Luis Ibanez]

Hi Eehui,

Are the X,Y,Z, coordinates of your data distributed
in a regular grid ?

The current implementation of LevelSets in ITK
intended to be used with images (regular grids).

It should be possible to extend this to your data,
or to map your data onto a regular grid for
performing the segmentation.

Extending level sets to a non-regular grid may
require to write a significant ammount of code...

If your dataset representas a terrain taken
from an airborne RGB detector then you may also
want to interpret this dataset as parameterized
on a regular grid in angular positions (for X,Y)
and contaning 4 values { Z, R, G, B }. In this
way your segmentation will find commong regions
that have similar altitude and similar color
composition.


    Regards,


       Luis


-----------------
ee hui lim wrote:

> Hi All,
> 
> I am a postgraduate research student in Monash
> University Australia, Electrical and Computer System
> Department. I have downloaded  ITK toolkit, and I'm
> interested in using it for segmenting my dataset, in
> this case, point clouds of building from LIDAR. I am
> not interested in researching into level set, instead
> I am interested in looking at how well level set can
> perform for my datasets and evaluate the performance
> with respect to other methods.
> 
> Therefore I hope someone can help me in figuring out
> the way to use your toolbox on my data. My range data
> has few components, 1. x range, 2. y range, 3. z
> range, 4. intensity, 5. color - R G and B values. for
> eg:
> X[m] Y[m] Z[m] R[0..1] G[0..1] B[0..1] Intensity[0..1]
> 0.291 4.324 1.653 0.008 0.008 0.008 0.000
> 0.289 4.291 1.624 0.012 0.008 0.000 0.000
> 0.290 4.297 1.609 0.004 0.004 0.004 0.000
> 0.292 4.334 1.606 0.008 0.008 0.008 0.000
> ...
> 
> Thanks.
> 
> Regards,
> Eehui 
> 
> 
> 	
> 
> 	
> 		
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