3 M. Vasanthi , * I. Thivya Roopini *, 1 S. S. P. ,2 P. R. M. (2017) “Improved PSO algorithm approach in Gray scale image multi-level thresholding”, International Journal of Engineering and Computer Science. india, 5(5). Available at: http://ijecs.in/index.php/ijecs/article/view/1156 (Accessed: 18 May 2024).