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Innovation and Digital Transformation for a Sustainable World




                     4.  RESULTS AND DISCUSSION

             The model  framework, along  with a number  of
             performance parameters, has been carefully examined. In
             images of a  mixture of healthy and  diseased  potato
             leaves, the current study can reliably identify diseased
             potato plant leaves. The present work is carried out using
             a  16GB NVIDIA  P100 GPU and Pytorch libraries
             loaded  on  the  Kaggle  platform  on kaggle  notebook.
             The Adam  optimizer  (which  yielded  the best results in
             comparison  to the other three)  was  used  to train the
             three distinct architectures which acted as the backbone
             to the detection model FRCNN. For ten epochs, a batch        (a)                         (b)
             of size  four is employed.  The 5-layer  CNN validation
             accuracy  was  97.16%,  the  4-layer  CNN  accuracy  was     Fig. 9 (a) Confusion matrix of     (b) Precision-Recall  5_layer_cnn
                                                                                        with the 3 classes
                                                                       5_layer_cnn
             73.21%  and  the  mobilenet  validation  accuracy  was
             78.43%. The accuracy comparison graphs are displayed
             in Fig. 7. The best model (5-layer CNN) then trained over
             30 epochs and fed to the FRCNN model shown in Fig. 8.
             Fig.  9(a) and Fig.  9(b) illustrates the creation of the
             confusion matrices and  precision-recall curves for the
             optimal architecture. In the  present  work,  the accuracy
             comparison with  the different optimizers  viz. Adam,
             AdamW, Sgd, Adadelta,  RMS Prop  has also been
             executed and the best  result is obtained  with the Adam
             optimizer as shown in Fig.  10  and reported  in table – 1.
             The performance parameter matrices attained potentially
             superior  values  with  precision  –  97.24%,  recall  –
             97.16%  and  F1  score  –  97.18%. Hence,  the  results
             obtained are promising in their values for the proposed 5-
             layer custom CNN model.                            Fig. 10 Training and validation Accuracy comparison curves for
                                                                    5-  layer CNN with different optimizers

                                                                Table – 1: Accuracy comparison of 5-layer custom CNN model with
                                                                                different optimizers















                                                                The FRCNN model has been deployed for the detection
             Fig.7 Accuracy Curves for the      Fig. 8 Training and  validation    purpose  of the diseased and  healthy  potato leaves. The
                  3 models                accuracy of 5-Layer CNN   model leverages minimum losses with the best model (5-
                                           over 30 epochs       layer custom CNN) in comparison to the other models as
                                                                reported  in  table  –  2.  The  best  IoU  (Intersection  over
                                                                Union) value achieved is 0.78 under a threshold of 0.6.
                                                                The  IoU comparison  with  the  considered  classifier
                                                                models as well as the  IoU comparison curves  with
                                                                different  optimizers for 5-  layer custom CNN has also
                                                                been plotted and shown in Fig. 11.












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