 This article aims to provide readers with a comprehensive overview of optical remote sensing image segmentation, RSIS, technology, by comparing various RSIS methods in terms of conceptual details, merits and demerits, and performance on optical images using the NWPUVHR 10 public dataset. The goal is to provide a clear comparative analysis of these methods to enhance our understanding of RSIS, and inform future research and development in this field. This article was authored by Yongju Wang, Hua Lv, Rui Deng, and others.