An Optimizing Cross-Entropy Thresholding for Image Segmentation based on Improved Cockroach Colony Optimization. - Jeng-Shyang Pan 001; Thi-Lan-Phuong Nguyen; Truong-Giang Ngo; Thi-Kien Dao; Thi-Thanh-Tan Nguyen; Trong-The Nguyen (J. Inf. Hiding Multim. Signal Process., 2020)