Block-matching subpixel motion estimation from noisy undersampled frames: an empirical performance evaluation
Sean Borman, Mark A. Robertson, Robert L. Stevenson · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1998
The performance of block-matching sub-pixel motion estimation algorithms under the adverse conditions of image undersampling and additive noise is studied empirically. This study is motivated by the requirement for reliable sub-pixel accuracy motion estimates for motion compensated observation models used in multi-frame super-resolution image reconstruction. Idealized test functions which include translational scene motion are defined. These functions are sub-sampled and corrupted with additive noise and used as source data for various block-matching sub-pixel motion estimation techniques. Motion estimates computed from this data are compared with the a-priori known motion which enables an assessment of the performance of the motion estimators considered.