Feature based image mosaicing using regions of interest for wide area surveillance camera arrays with known camera ordering
Date of Award
M.S. in Electrical Engineering
Department of Electrical and Computer Engineering
Advisor: Eric Balster
Today, modern surveillance systems utilizing camera arrays can capture several square miles of ground activity at high resolution from a single aircraft. A camera array uses multiple cameras to capture images synchronously with partial overlap between cameras' fields of view. This allows a wide area to be monitored continuously in real time by image analysts or processed for information such as object identification and location tracking. The task of combining these images from each individual camera into one large image containing all of the images' views of the scene activity is commonly called image mosaicing in the field of computer vision. Though the process of image mosaicing is not new, what makes image mosaicing a topic of current research is the difficulty and variety of both problems and solutions. The objective of this thesis is to demonstrate the most suitable system to mosaicing images captured by wide area surveillance camera arrays with known camera ordering by using regions of interest combined with a feature based approach. The proposed system utilizes algorithms for feature extraction, matching, and estimation. The key difference between the proposed mosaicing system and prior successful mosaicing systems within other application domains is the use of known camera ordering. In many previously researched mosaicing systems no assumption is made for camera order, and in fact in some applications there is no assumption that images may even be viewing the same scene at all. However, for applications involving wide area surveillance camera arrays these assumptions are perfectly valid. This allows bounded regions of interest near the appropriate image borders to be used which is demonstrated in the proposed system to increase performance in both pixel accuracy and mosaic computation times over the more generalized mosaicing approach.
Image registration, Photographic mosaics, Aerial photogrammetry, Imaging systems, Remote sensing
Copyright 2011, author
Ballard, Brett S., "Feature based image mosaicing using regions of interest for wide area surveillance camera arrays with known camera ordering" (2011). Graduate Theses and Dissertations. 317.