Erik Ringaby

Biography:

I received my MSc in Applied Physics and Electrical Engineering at Linköping University in 2008. Since then I have been a Ph.D. student at the Computer Vision Laboratory.

Research interests include registration, geometry, non-linear optimisation, rolling shutter and pushbroom sensors, video stabilisation and parallel computing.

Check out our tutorial Computer Vision on Rolling Shutter Cameras at CVPR 2012.

Project

I'm currently working in a project on rolling shutter cameras: Virtual Global Shutters. Project funded by CENIIT.

A data-set for rolling-shutter evaluation is available here.
The dataset is described in the CVPR paper: Per-Erik Forssén and Erik Ringaby, Rectifying rolling shutter video from hand-held devices, CVPR 2010, IEEE Computer Society [PDF]. [Supplementary material]

Publications

• "Optical Flow Computation on CUDA", Ringaby, Erik, Proceedings of SSBA 2009, IAPR, 2009. 81-84.
• "Co-alignment of Aerial Push-Broom Strips using Trajectory Smoothness Constraints", Ringaby, Erik and Ahlberg, Jörgen and Forssén, Per-Erik and Wadströmer, Niclas, Proceedings of SSBA 2010, IAPR, 2010, 63-66.
• "Rectifying rolling shutter video from hand-held devices", Forssén, Per-Erik and Ringaby, Erik, Proceedings of CVPR 2010, IEEE Computer Society, 2010. (Oral)
• "Co-aligning aerial hyperspectral push-broom strips for change detection", Ringaby, Erik and Ahlberg, Jörgen and Wadströmer, Niclas and Forssén, Per-Erik, Proceedings of SPIE Security+Defence 2010, September 2010, SPIE Vol. 7835
• "Rectifying Rolling Shutter Video from Hand-Held Devices", Ringaby, Erik and Forssén, Per-Erik, Technical Report, SSBA11, March 2011
• "Efficient Video Rectification and Stabilisation for Cell-Phones", Ringaby, Erik and Forssén, Per-Erik, International Journal of Computer Vision, Online June 2011, In press.
• "Structure and Motion Estimation from Rolling Shutter Video", Hedborg, Johan and Ringaby, Erik and Forssén, Per-Erik and Felsberg, Michael, IMVW11, November 2011
• "Stabilizing Cell Phone Video using Inertial Measurement Sensors", Hanning, Gustav and Forslöw, Nicklas and Forssén, Per-Erik and Ringaby, Erik and Törnqvist, David and Callmer Jonas, IMVW11, November 2011 (Best paper award)
• "Scan Rectification for Structured Light Range Sensors with Rolling Shutters", Ringaby, Erik and Forssén, Per-Erik, International Conference on Computer Vision, November 2011.
• "Rolling Shutter Bundle Adjustment ", Hedborg, Johan and Forssén, Per-Erik and Felsberg, Michael and Ringaby, Erik, Proceedings of CVPR 2012, IEEE Computer Society, June 2012.
• "Anisotropic Scattered Data Interpolation for Pushbroom Image Rectification ", Ringaby, Erik and Friman, Ola, and Forssén, Per-Erik, and Opsahl, Thomas, and Haavardsholm, Trym Vegard and Kĺsen, Ingebjřrg, IEEE Transactions on Image Processing, Vol. 23, No. 5, Pages 2302-2314. May 2014.
• "A Virtual Tripod for Hand-held Video Stacking on Smartphones", Ringaby, Erik and Forssén, Per-Erik, Proceedings of ICCP 2014, IEEE Computer Society, IEEE Xplore. May 2014.
• "Fast segmentation of sparse 3D point trajectories using group theoretical invariants", Vasileios Zografos, Reiner Lenz, Erik Ringaby, Michael Felsberg, Klas Nordberg, Proceedings of ACCV 2014, IEEE Computer Society, Nov 2014.