射影几何:长度信息丢失 ·哪些物理信息丢失? ·长度 Who is taller? Which is closer? Hangzhou①1 mzi Univer容内y杭州电子大学 School of Computer Science and TechinologyHangzhou Dianzi University 杭州电子科技大学 School of Computer Science and Technology 计算机学院 周文晖 • 哪些物理信息丢失? • 长度 Who is taller? Which is closer?