Refined quadrilinear interpolation

Image analysis – Image transformation or preprocessing – Changing the image coordinates

Reexamination Certificate

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C358S525000

Reexamination Certificate

active

07315660

ABSTRACT:
A method of concealing error within a surface delimited by edges and containing points with which erroneous values are associated. A new value is interpolated for at least one point on the surface from interpolation points defined in a projection step by the projections in orthogonal directions of the point to be interpolated onto the edges of the surface. Primary distances are determined between the point to be interpolated and the interpolation points. The sums of the primary distances in each of the directions are calculated, the sums being called secondary distances. The interpolation step provides for determination of the new value of a point to be interpolated from the values associated with the respective interpolation points weighted by weights calculated according to the respective primary distances and second distances.

REFERENCES:
patent: 6697126 (2004-02-01), Moni et al.
patent: 7110947 (2006-09-01), Cox et al.
patent: 2002/0133764 (2002-09-01), Wang
patent: 2002/0157058 (2002-10-01), Ariel et al.
“Multi-Directional Interpolation for Spatial Error Concealment” Wilson Kwok et al, IEEE Transactions on Consumer Electronics, IEEE vol. 39, No. 3, Aug. 1, 1993, p. 455-460.
“Temporal and Spatial Error Concealment Techniques for Hierarchical MPEG2 Video Codec” S. Aign et al, Proc. Globecom '95 oo, 1778-1783.

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