航测CCD预处理系统的设计与实现

The design and implementation of preprocessing system based on aerial photograph measurement

设计了一个应用于航空摄影测量的CCD预处理系统。系统由相机数据处理和控制分系统组成。相机数据处理部分实现与记录系统和机上数传系统间的数据通信,要求对CCD相机送来的数据进行合成、压缩、缓存和视频编码。控制分系统实现与各系统之间的串口通信、温度控制以及电压转换。介绍了视频编码芯片和单片机通过I2C总线进行数据通信的原理和具体实现。该系统已经通过验证,可满足航空摄影测量的需求。

A preproeessing system applied to aerial photograph measurement is designed. The system includes camera data processing and controlling subsystem. The part of camera data processing is to implement data communication with recording system and data transport system on the plane. The data from CCD camera are demanded to combine, compress, store and video encode. Controlling subsystem is to achieve serial port communication with other systems, temperature controlling and vohage conversion. The theory and realization of data communication through I2C bus between video encoding chip and single-chip are presented. The system is validated and satisfies the requirement to aerial photograph measurement.