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. Author manuscript; available in PMC: 2009 May 1.
Published in final edited form as: IEEE Trans Med Imaging. 2008 May;27(5):577–588. doi: 10.1109/TMI.2007.908687

Fig. 2.

Fig. 2

Illustration of a mathematical treatment of the categorization procedure that is equivalent to a rating procedure. Ellipses with different shadings schematically represent the distributions of decision variables for the three classes. Triangle is a random sample from class 1, the square is a random sample from class 2, and the disk represents a random sample from class 3. (a) Illustration of a case where the triplet can be correctly categorized. (b) Illustration of a case where correct categorization is not possible for any position of the proposed decision structure.