Accuracy research on coded levelling staff using digital photos/Niveliacijos matuokliu kodiniu skaliu tikslumo tyrimai pagal ju skaitmenines nuotraukas

The article introduces accuracy research on coded levelling staff using digital photos. The principles of photogrammetry can be used for comparing the views of the etalon and meter to be calibrated. The etalon view is saved in the PC memory and the view of the tested meter must be extracted from the...

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Bibliographic Details
Published in:Geodezija ir kartografija 2009-12, Vol.35 (4), p.140
Main Authors: Aksamitauskas, Vladislovas Ceslovas, Rekus, Donatas
Format: Article
Language:English
Subjects:
Electronic cameras
Equipment and supplies
Geodetic research
Image processing
Methods
Photogrammetry
Technology application
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Summary:The article introduces accuracy research on coded levelling staff using digital photos. The principles of photogrammetry can be used for comparing the views of the etalon and meter to be calibrated. The etalon view is saved in the PC memory and the view of the tested meter must be extracted from the digital camera. All measurements are performed on the PC screen using an analyzing gap covering both images. Accordingly, gauges to measure deviations between the lines of the coded scales can be evaluated. The article is aimed at conducting accuracy research on coded levelling staff using digital photos. The conclusions are presented. Pristatomas kodiniu niveliavimo matuokliu tikslumo tyrimas pagal ju skaitmenines nuotraukas. Niveliavimo matuokliu bruksniu padeties tikslumas nustatomas lyginant atramines ir tikrinamos matuokliu fotogrametrinius vaizdus arba atramini mata pakeitus fotogrametriniu atramines matuokles vaizdu, uzfiksuotu skaitmeniniu fotoaparatu ir perkeltu i kompiuterio atminti. Siuo atveju atramines kodines niveliavimo matuokles skales bruksniu padetis yra lyginama su kalibruojamos matuokles bruksniu padetimi. Pagal tai galima ivertinti matuokliu kodiniu bruksniu tarpusavio nuokrypius. Tyrimo tikslas--atlikti kodiniu niveliavimo matuokliu tikslumo tyrima pagal ju skaitmenines nuotraukas. Reiksminiai zodziai: kodines niveliavimo matuokles, kalibravimas, skaitmeninis fotoaparatas, pikseliai.
ISSN:1392-1541
DOI:10.3846/1392-1541.2009.35.140-143