Invariant image reconstruction from irregular samples and hexagonal grid splines

Authors:
Flore Faille;Maria Petrou
Affiliations:
Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK;Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
Venue:
Image and Vision Computing
Year:
2010

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Abstract

We present an algorithm for the reconstruction of images from irregularly placed samples, using linear splines with control points on a hexagonal grid. Several spline approximations are computed for different transformations of the control point grid (e.g. translations and rotations). These approximations are then merged together after compensation of the transformations, yielding a high-quality invariant image reconstruction. Evaluations show that the use of hexagonal grids of the ''invariance by integration'' principle improves reconstruction quality. An application to image coding is also presented.