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184   Chapter 6 Plant leaf disease classification based on feature selection




                                       The model is run within the algorithm as the cost function. Af-
                                    ter reaching the maximum iteration, the best subset of feature is
                                    obtained (Fig. 6.26).
                                       After running the proposed wrapper algorithm for 20 itera-
                                    tions, the best solution is [1, 1, 0, 1, 1 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1,
                                    1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1], which means there
                                    are 24 features that are selected out of 36. Details of the solution
                                    are in Table 6.9.


                                      (A)
                                                      Training and Valida on Loss
                                        0.8
                                        0.7
                                        0.6
                                        0.5
                                        Loss  0.4
                                        0.3
                                        0.2
                                        0.1
                                         0
                                           1  3  5  7  9 1113151719212325272931333537394143454749
                                                                  Epochs
                                                          Training loss  Valida on loss

                                      (B)
                                                      Training and Valida on Result
                                         90.00%
                                         80.00%
                                         70.00%
                                         60.00%
                                        Accuracy  50.00%
                                         40.00%
                                         30.00%
                                         20.00%
                                         10.00%
                                         0.00%
                                              1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49
                                                                   Epochs
                                                          Training acc  Valida on acc
                                             Figure 6.26 Result of MLP. MLP, multilayer perceptron.
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