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Proceedings Paper

Control grid interpolation using motion discontinuity patterns
Author(s): Joon Hyun Sung; Joon-Ho Chang; Dong-Il Chang; ChoongWoong Lee
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Paper Abstract

Control grid interpolation (CGI) was suggested to overcome the drawbacks of the block matching algorithm such as blocking artifacts. In CGI, smooth motion field is obtained because motion vectors are spatially transformed from the control points. However, when there are more than two objects which move in different directions, distortion may be involved near the motion boundaries due to the continuity of the motion field. To cope with this problem, we use motion discontinuity pattern and the motion vectors are transformed according to the motion discontinuity. For the determination of motion discontinuity pattern, the similar vectors are grouped together and the grouping pattern is checked. Since this determination is carried out by simple calculation of the motion vectors which are available at the decoder, no side information is necessary and the additional complexity is negligible. The modified CGI with motion discontinuity outperforms the conventional CGI in objective and subjective qualities.

Paper Details

Date Published: 9 January 1998
PDF: 9 pages
Proc. SPIE 3309, Visual Communications and Image Processing '98, (9 January 1998); doi: 10.1117/12.298379
Show Author Affiliations
Joon Hyun Sung, Seoul National Univ. (South Korea)
Joon-Ho Chang, Samsung Electronics Co. (South Korea)
Dong-Il Chang, Seoul National Univ. (South Korea)
ChoongWoong Lee, Seoul National Univ. (South Korea)


Published in SPIE Proceedings Vol. 3309:
Visual Communications and Image Processing '98
Sarah A. Rajala; Majid Rabbani, Editor(s)

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