Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 1

Bezier curves Related Publications

1 Shape Error Concealment for Shape Independent Transform Coding

Authors: Jaroslav Polec, Sandra Ondrušová

Abstract:

Arbitrarily shaped video objects are an important concept in modern video coding methods. The techniques presently used are not based on image elements but rather video objects having an arbitrary shape. In this paper, spatial shape error concealment techniques to be used for object-based image in error-prone environments are proposed. We consider a geometric shape representation consisting of the object boundary, which can be extracted from the α-plane. Three different approaches are used to replace a missing boundary segment: Bézier interpolation, Bézier approximation and NURBS approximation. Experimental results on object shape with different concealment difficulty demonstrate the performance of the proposed methods. Comparisons with proposed methods are also presented.

Keywords: Bezier curves, NURBS, error concealment, shape coding, object-based image

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