Task 3, Segmenting the original image

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You can segment the original image using either the FANTASM plug-in program or the Fuzzy C-Means algorithm. The FANTASM plug-in program, a different version of the Fuzzy C-Means algorithm, provides segmentation that is less sensitive to noise. This section provides directions for both:
Using FANTASM to segment the image
Using the Fuzzy C-Means algorithm to segment the image

To use the FANTASM plug-in program

1 Select the original image.
2 Select Plug-In > Algorithms > FANTASM. The FANTASM dialog box opens.
Figure 44. FANTASM dialog box

{| align="center" | File:DialogboxFANTASM.gif |}


3 Complete the dialog box:
In Number of desired classes, select either 2 classes if the CPF was stripped off the image previously or 3 classes if the CPF is still in the image.
In Segmentation, select Hard only, which is the only segmentation needed for measurements.
4 Click OK. The Initial Centroids dialog box opens.
Figure 45. Initial Centroids dialog box

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File:TechGuide MappingBrainsTalairach28.gif



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5 Click OK.
A series of progress messages appear, and data appears on the Data page in the Output window ([TechGuide_MappingBrainsTalairach.html#1252994 Figure 46]).
Figure 46. Data on the Data page in the Output window

{| align="center"

DialogboxOutputFANTASMdata.jpg



|}


In a few moments, processing completes, and an image appears ([TechGuide_MappingBrainsTalairach.html#1221822 Figure 47]A).
Figure 47. FANTASM image

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ExampleCompositeImageFANTASM.jpg



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