Forest road surface detection using LiDAR-SLAM and U-Net. - Hiroyuki Nakagomi; Yoshihiro Fuse; Yasuki Nagata; Hidehiko Hosaka; Hironaga Miyamoto; Masashi Yokozuka; Akiya Kamimura; Hiromi Watanabe; Tsutomu Tanzawa; Shinji Kotani (SII, 2021)