Classification Methods for Remotely Sensed Data, Second Edition
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Figure 4.6 Four types of commonly used fuzzy membership functions: (a) Monotonic; (b) triangular; (c) trapezoidal; (d) bell-shaped.
Trapezoidal:
(4.28) |
Bell-shaped:
(4.29) |
The parameter s denotes a measurement (e.g. a pixel value), μ(s) is the membership grade, a denotes the centre of the fuzzy membership function, and λ controls the width of the membership function.
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