Adaptive approximation bounds for vertex based contour encoding

When approximating the shape of a region, a fixed bound on the tolerable distortion is set for approximating its contour points. An adaptive approximation bound for lossy coding of the contour points is proposed. A function representing the relative significance of the contour points is defined to adjust the distortion bound along the region contour allowing an adaptive approximation of the region shape. The effectiveness of the adaptive contour coding approach for a region-based coding system is verified through experiments.

[1]  Gerald Heckner.  Redundancy reducing coding of moving object shapes , 1997, Signal Process. Image Commun..

[2]  Thomas S. Huang,et al.  Estimating three-dimensional motion parameters of a rigid planar patch , 1981 .

[3]  Aggelos K. Katsaggelos,et al.  An efficient boundary encoding scheme which is optimal in the rate distortion sense , 1997, Proceedings of International Conference on Image Processing.

[4]  Milan Sonka,et al.  Image pre-processing , 1993 .

[5]  M. Ibrahim Sezan,et al.  Content-scalable shape representation and coding , 1997, Proceedings of International Conference on Image Processing.

[6]  Peter Gerken,et al.  Object-based analysis-synthesis coding of image sequences at very low bit rates , 1994, IEEE Trans. Circuits Syst. Video Technol..

[7]  John F. Canny,et al.  A Computational Approach to Edge Detection , 1986, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[8]  Jörn Ostermann,et al.  Object-oriented analysis-synthesis coding of moving images , 1989, Signal Process. Image Commun..

[9]  Jae Kyoon Kim.  Shape information reduction based on contour prediction and shape coding type , 1995 .

[10]  M. Hotter,et al.  Optimization and efficiency of an object-oriented analysis-synthesis coder , 1994 .