Video super-resolution based on local invariant features matching

This paper presents an algorithm for video super-resolution based on scale-invariant feature transform (SIFT) matching. SIFT features are known to be a robust method for locating keypoints. The matching of these keypoints from different frames in a video allows us to infer high-frequency information in order to perform example-based super-resolution. We first apply a block constrained keypoint detection for a more precise superposition of features. Later, we extract high-frequency information with a gradient-based matching scheme. Our results indicate gains over interpolation and previous example-based super-resolution approaches.