本书主要说的是低空数码影像处理的内容，其中包括摄影测量的内定向、相对定向、绝对定向、影像匹配、以及dem的处理等等内容-This book says that the low-level image processing of digital content, including within the photogrammetric orientation, relative orientation, absolute orientation, image matching, as well as the handling and much more dem