High resolution image formation from low resolution frames using Delaunay triangulation

Authors:
S. Lertrattanapanich;N. K. Bose
Affiliations:
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA;-
Venue:
IEEE Transactions on Image Processing
Year:
2002

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Abstract

An algorithm based on spatial tessellation and approximation of each triangle patch in the Delaunay (1934) triangulation (with smoothness constraints) by a bivariate polynomial is advanced to construct a high resolution (HR) high quality image from a set of low resolution (LR) frames. The high resolution algorithm is accompanied by a site-insertion algorithm for update of the initial HR image with the availability of more LR frames till the desired image quality is attained. This algorithm, followed by post filtering, is suitable for real-time image sequence processing because of the fast expected (average) time construction of Delaunay triangulation and the local update feature.