摘要
在光电经纬仪测量信息转换成数字图像过程中,如果直接将光测胶片转换成位图图像,形成的数据量极大,不利于传输和存储,而进行压缩又影响图像质量,降低判读精度。本文采用图像处理技术,根据光测胶片的信息记录原理及数据处理的具体要求,设计了一种将胶片图像划分成不同区域进行处理的方法,对影响判读精度的区域进行直接存储,对其他区域进行压缩处理,并保存各区域与十字丝中心的相对位置以保证图像恢复时各区域精确地合成,此种方法降低了图像信息的数据量,确保了数据处理精度,实现了光测胶片图像的数字化,解决了光电经纬仪测量信息存储和传输中数据量巨大的难题。
During the course of changing film theodolite survey information into numeral pictures, if the optical survey films are transformed into the bitmap directly, the data will become larger, which will hinder transmission and storage. If the data are compressed, the precision of judging the position of the object will be reduced. This paper adopts picture_handling technology, according to the information recording principles of optical survey film, and the concrete demands of data processing. It designs a new method which can divide the film pictures into different areas, realize direct storage of the areas affecting precision, conduct compression in other areas, and maintain the relative position of different areas to the cross. The goal is for these areas to compose properly when the pictures are restored. The method reduces the data, assures the precision of data, realizes the number of optical survey films and also solves the serious problem of information storage and transmission of optical theodolite survey information.
出处
《光学精密工程》
EI
CAS
CSCD
2002年第6期569-572,共4页
Optics and Precision Engineering
