Research on coding and decoding method for digital levels.
A new coding and decoding method for digital levels is proposed. It is based on an area-array CCD sensor and adopts mixed coding technology. By taking advantage of redundant information in a digital image signal, the contradiction that the field of view and image resolution restrict each other in a digital level measurement is overcome, and the geodetic leveling becomes easier. The experimental results demonstrate that the uncertainty of measurement is 1 mm when the measuring range is between 2 m and 100 m, which can meet practical needs.
School of Electronic Information, Wuhan University, Wuhan, Hubei 430079, China. tulifen_0301@163.com
Li-fen
LF
Tu
Si-dong
SD
Zhong