Improving Spatial Resolution in Exchange of Temporal Resolution in Aliased Image Sequences
Lucas J. van Vliet, Cris L. Luengo Hendriks · Research Repository (Delft University of Technology) · 1999
We present a method to improve the spatial resolution of an aliased image sequence in exchange for a lower temporal resolution.The frames are acquired by a vibrating infrared camera, which yields severely undersampled (aliased) image frames of a static scene.The vibration causes a random sub-pixel shift of the scene before sampling.The proposed method first estimates the relative position of all frames after which the periodic-random samples are interpolated on a equidistant grid with a smaller pixel pitch to improve spatial resolution and (partially) eliminate aliasing.The presented method is robust, is completely data driven and has a moderate computational complexity, which permits a real-time implementation in hardware.