Singh, Aman, Ahemad Mohammed, and Trupti Barasakar. 2018. “A Multi-Level Thresholding for Image Segmentation Using Improved PSO Algorithms”. Asian Journal For Convergence In Technology (AJCT) ISSN -2350-1146 3 (3). http://www.asianssr.org/index.php/ajct/article/view/209.