Talks and Poster Presentations (with Proceedings-Entry):
J. Otepka, C. S. Fraser:
"Accuracy Enhancement of Vision Metrology Through Automatic Target Plane Determination";
Talk: International Society for Photogrammetry and Remote Sensing XXth Congress,
- 2004-07-23; in: "Proceedings",
O. Altan (ed.);
Vol XXXV, Part B/5
In digital close-range photogrammetry, commonly referred to as vision metrology, circular targets are often used for high precisionapplications. The most common target type used consists of retro-reflective material, which provides a high contrast image with flashphotography. The measurement of image coordinates of signalised targets continues to be a factor limiting the achievable accuracyof high-precision vision metrology systems. Mathematical algorithms are used to determine the centres of imaged targets in 2Dspace. These 2D centroids are then used in a triangulation process to calculate the target position in 3D space. This computationalprocess assumes that the targets represent perfect `points´ in space. However, in practice target-thickness and target-diameter canadversely effect this assumption, leading to the introduction of systematic errors and to incorrect calculation of 3D position. Thepaper presents the development of a target plane determination process, which will serve to automatically correct for these errors.This will also lead to high accuracies within the bundle adjustment via an improved mathematical model.
Online library catalogue of the TU Vienna:
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.