ProTractor: A Lightweight Ground Imaging and Analysis System for Early-Season Field Phenotyping. - Nico Higgs; Blanche Leyeza; Jordan R. Ubbens; Josh Kocur; William van der Kamp; Theron Cory; Christina Eynck; Sally Vail; Mark G. Eramian; Ian Stavness (CVPR Workshops, 2019)