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...

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Veröffentlicht in:	Applied Optics 2011-01, Vol.50 (3), p.356-359
Hauptverfasser:	Tu, Li-fen, Zhong, Si-dong
Format:	Artikel
Sprache:	eng
Schlagworte:	CHARGE-COUPLED DEVICES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIGITAL SYSTEMS INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY RESOLUTION SENSORS
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Beschreibung
Zusammenfassung:	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.
ISSN:	0003-6935 2155-3165 1539-4522
DOI:	10.1364/AO.50.000356