Based on the experiences gained so far, and the problems
encountered in the aerial triangulation of the UAV imagery
with the very specific features the software UAVision (Huber,
2012) was specifically developed to produce improved input
data for bundle adjustment of UAV images by PAMS. The
selection of tie points and a multi-ray matching procedure was
based on the Open-Source Library OpenCV (Open Source
Computer Vision, Willow Garage 2011). The output was
intended to be used in a bundle adjustment using the Open
Source package sba (Lourakis and Argyros 2009)