The compute method and error analysis of intersection frequency as well as the measuring principle and designing concept of hardware and software of two methods via single-chip computer are focused.
重点介绍了交点频率的计算方法和误差分析，提供了用单片机实现这两种方法的测量原理和硬软件设计思路。
The high accuracy center measuring method of marked points technique based on the fitting sub-pixel edge, and the methods of coded points designing and coded points auto-detecting were investigated.
采用编码点和非编码点相结合的方法实现摄影测量中对应点匹配技术，讨论了标记点的中心亚像素定位方法、两类标记点的识别及编码标记点的解码方法。
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