Browsing by Subject "engineering photogrammetry"

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Access status: Open Access ,
Wykonywanie naziemnych zdjęć cyfrowych o ściśle określonej orientacji
(Wydawnictwa AGH, 2006) Bernasik, Jerzy; Mikrut, Sławomir
Taking surface images of precisely known (at the level of a theodolithe accuracy) elements of external orientation makes a rarely taken chance in terrestrial photogrammetry. Usually control points are used to increase the accuracy of the processing images when the orientation is not enough precisely known. It is particularly difficult - apparently - in case of photographs taken with non-metric cameras. The solution solved by the authors in the measurements of shape anomalies of slender buildings was based on a prototype instrument allowing the installation of a KODAK DCS 760 camera on a Theo 010 theodolithe. In the paper the authors present the results of studies enabling them to assess the accuracy of the orientation level of pictures. The described solution makes a new chance for the digital photogrammetry of a close-to-zero distance by widening the range of economically justified applications of this method in engineering and construction. The application of author's algorithms of the detection of features in a digital image allowed the analysis and measurement with a sub-pixel accuracy. This enables an accurate definition of the terrain co-ordinates of the measured points (elements).