Contributions to Colon Segmentation Without Previous Preparation in Computer Tomography Images

METHODOLOGY

• Selecting Valid Regions

• Two adjacent regions parallelepipeds- inside the colon, one with feces matter and the other with air.

• The region descriptors (Variance and mean) are the main parameters for both explorer evaluation and region growing steps.

METHODOLOGY

• Defining the advance vector

• The procedure defines an initial direction vector, the first main explorer

• (the vector between the centroids of the two selected valid regions)

METHODOLOGY

• Defining the Explorer Beam

• The explorer beam (EB) is a set of vectors used to guide the advance in the segmentation process.

• the main explorer of the EB ep and a set of vectors to build an an explorer semi-conic beam

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