Title :
Coding of arbitrarily shaped video objects using B-spline wavelets
Author :
Sepponen, Mervi ; Koivunen, Visa
Author_Institution :
Dept. of EE, Univ. of Oulu, Oulu, Finland
Abstract :
This paper addresses the problem of encoding and decoding image patches in a model-based image coding scheme. Any arbitrarily shaped video object can be represented using a triangular mesh. A method for coding triangular image blocks using B-spline wavelet filter banks is developed here. Triangles are considered degenerate rectangular blocks hence the same coding can be used for rectangular blocks as well. Triangles at the boundary of a video object are allowed to have curved boundaries in order to have more accurate shape representation using fewer elements. In the decoding end, patches are warped using affine motion estimates. Examples are given using real image data.
Keywords :
affine transforms; channel bank filters; decoding; image filtering; image representation; motion estimation; splines (mathematics); video coding; wavelet transforms; B-spline wavelet filter bank; affine motion estimation; arbitrarily shaped video object coding; image patch decoding; image patch encoding; model-based image coding scheme; shaped video object representation; triangular mesh; Encoding; Filter banks; Image coding; Image reconstruction; Shape; Sparse matrices; Splines (mathematics);
Conference_Titel :
Signal Processing Conference (EUSIPCO 1998), 9th European
Conference_Location :
Rhodes
Print_ISBN :
978-960-7620-06-4
