Page 328 - NGTU_paper_withoutVideo
P. 328

Modern Geomatics Technologies and Applications



























                                                                                     Object oriented classification
               Pixel base classification                                                                                        Fig. 5

                                                Fig.4. Classification maps of two methods in IKONOS image.


          6 - Comparison of the classification results by pixel-based and object-oriented approaches


          In flowing graphs, the evaluation results of pixel base classification and object-oriented classification were shown.


                  120

                  100

                   80

                   60
                   40

                   20

                    0
                    Vegetation   Road  Residental   Bare  Shadow   Kappa Coefficient
                                                           Overall Accuracy





                       LISS-PB          LISS-OB         IRS-PAN -PB
                       IRS- PAN - OB    IKONOS -PB      IKONOS- OB


          Fig.5 comparing classification accuracy by two methods in different images (emphasizing class extraction)



                                                                                                               7
   323   324   325   326   327   328   329   330   331   332   333