We propose a new multiframe algorithm to enhance the spatial resolution of frames in video sequences. Our technique specifically accounts for the possibility that motion estimation will be inaccurate and compensates for these inaccuracies. Experiments show that our multiframe enhancement algorithm yields perceptibly sharper enhanced images with significant signal-to-noise ratio (SNR) improvement over bilinear and cubic B-spline interpolation.

This paper focuses on the spatial resolution enhancement of a video sequence. In contrast to previous work with grayscale images and highly constrained motion, we present a technique for color video frames with general motion. The method consists of determining subpixel motion estimation between video frames and subsequently using these estimates along with the original low resolution frames to iteratively create a sequence of enhanced resolution frames. We present a novel motion estimation technique based on determining a set of candidate motion estimates per pixel. Experimental results for video sequences containing general motion are presented to verify our technique. Enhanced frames using this technique show significant improvement in both SNR and perceived visual quality over methods such as bilinear and cubic B-spline interpolation.

Given a subspace 𝒳 ⊆ Rd and a finite set S⊆Rd, we introduce the Delaunay simplicial complex, D𝒳, restricted by 𝒳. Its simplices are spanned by subsets T⊆S for which the common intersection of Voronoi cells meets 𝒳 in a non-empty set. By the nerve theorem,⋃D𝒳 and 𝒳 are homotopy equivalent if all such sets are contractible. This paper shows that ⋃D𝒳 and 𝒳 are homeomorphic if the sets can be further subdivided in a certain way so they form a regular CW complex.

Article Incremental topological flipping works for regular triangulations Share on Authors: H. Edelsbrunner View Profile , N. R. Shah View Profile Authors Info & Claims SCG '92: Proceedings of the eighth annual symposium on Computational geometryJuly 1992 Pages 43–52https://doi.org/10.1145/142675.142688Published:01 July 1992 56citation651DownloadsMetricsTotal Citations56Total Downloads651Last 12 Months9Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access