Interactive Media Systems, TU Wien

On Robust Homography Estimation Across the 2D/3D Modalities

Thesis by Adam Barclay

Supervision by Hannes Kaufmann


Co-registered intensity and range imaging is one example of complementary multi-modality that has been extensively explored for 3D reconstruction, yet not fully researched for robust estimation. The classic RANdom SAmple Consensus and its variants such as PROSAC, Preemptive RANSAC and SCRAMSAC, to name a few, have been the most commonly applied approaches to visionbased homography estimation, with single modality input as a precondition. In this thesis, RANSAC- based homography estimation that builds on the properties of both the 2D intensity modality and 3D spatial modality is to be explored, extended and evaluated with focus on robust estimation. The outcome of this thesis is an extension to the RANSAC algorithm, termed FT-RANSAC, that builds on state-of-the art in RANSAC approaches, and enables a robust homography estimation using both the 2D intensity modality and the 3D point cloud modality inputs. The proposed FT-RANSAC approach has demonstrated its ability to exceed singlemodality state-of-the art in robustness and stability, with implementations as a stand-alone and as an ROS node, and with cross-platform functionality on both Intel x86 and ARM Cortex-A15 architectures.


A. Barclay: "On Robust Homography Estimation Across the 2D/3D Modalities"; Supervisor: H. Kaufmann; Institut für Softwaretechnik und Interaktive Systeme, 2015; final examination: 06-19-2015.


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