Dual-correlate optimized coarse-fine strategy for monocular laparoscopic videos feature matching via multilevel sequential coupling feature descriptor

Ziang Zhang, Hong Song, Jingfan Fan, Tianyu Fu, Qiang Li, Danni Ai, Deqaing Xiao, Jian Yang

Abstract: Highlights•Establish a coarse-fine feature matching network for monocular laparoscopic frames to conduct high-quality matches.•Design sequential coupling mechanism to extract and express multilevel feature maps efficiently.•Propose dual-correlate optimization for refining pixel-wise fine-level matches.•Achieve outstanding performance on Scared and EndoSLAM datasets.