Optimal Threshold using GOA Multilevel based for Coastal Image Segmentation I Gusti Ngurah Agung Pawana1*, I Made Oka Widyantara2, Made Sudarma3, Dewa Made Wiharta4, Made Widya Jayantari5
1,2,3,4 Department of Electrical Engineering, Udayana University, Badung, Bali
5 Department of Civil Engineering, Udayana University, Badung, Bali