[Insight-users] Segmentation data

[criskross]

Okay sorry for my wrong description.

But what about the .vtk and .vti extension files? Are they real image files?
There I can construct faces and use vertices to create ROIs. Also you can
use other colors and so on. 

I only want to segment a slice of a dicom series. The segmentation file
should hold information about the pixels of interest like Postion(x,y):
(13,50) and a color(R;G;B;A): ....

Thanks in advance

Christian


maurom wrote:
> 
> Hi Christian,
> 
>> what I even didn't understand is how to save for example a transformation
>> or
>> windowing as a file which describes even the process to get the resulting
>> image. Do you unterstand what I would like to get?
>>
>> Example: I am a physician and I would like to mark a tumor within image
>> data
>> of a brain.  I don't want to change the original image data but I would
>> like
>> to save a description of how to segment the image for displaying the
>> tumor.
> 
> In the first paragraph you are talking about "transformation", broadly
> speaking a transformation occurs when you "transform" the original
> image into another image. For example, when you rotate an image you
> "transform" the original image into a rotated one. You can overwrite
> the transformed image to the original one, or you can save the
> transformation in another file, depending on what you are trying to
> achieve.
> 
> Segmentation is a totally different story. Segmentation do not
> transform an image into another one, but it is a process of mapping
> semantically the "objects" in the image. The output of a segmentation
> algorithm might be stored in another file, which -for convenience-
> might be an image with the same format/dimension/spacing/etc of the
> input image. When you segment an image you end up with the original
> image AND another image mapping the original one.
> 
> In your example, the segmented image might be an image with the same
> dimension/spacing/etc of the original image, but the values of the
> segmented image would be all ones in correspondence of the tumour, and
> zeros otherwise. Does it make sense? The physician might use a
> combination of those two images to have an idea of what goes on, often
> a rendering of the segmentation image might help the physician. You
> might want to have a look at VTK for the visualization bit.
> 
> HTH,
> Mauro
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