一、前言摄影测量中最繁重的工作莫过于用人眼观测象片以提取有用数据,经相应处理后得到符合一定比例尺的地图.现今的自动测图仪或自动测图系统,已经利用光电转换技术来代替人眼观测以取得有用信息经相关器和电子计算机处理后完成测图任务。自动测图仪中的光电转换系统主要由扫描器和传感器组成。图一表示出它们在自动测图 I. Foreword The heaviest work in photogrammetry is the observation of images with human eyes to extract useful data and, after appropriate processing, a map that meets a certain scale is available.Nowadays, automatic plotters or automated mapping systems have utilized photoelectric conversion techniques To replace the human eye observation to obtain useful information by the correlator and electronic computer processing completed mapping tasks. The photoelectric conversion system in the automatic plotter mainly consists of a scanner and a sensor. Figure 1 shows that they are in automatic mapping