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Optical Engineering

Frame-rate conversion using hybrid-search-based motion estimation and adaptive motion-compensated interpolation
Author(s): Young Duk Kim; Joonyoung Chang; Gun Shik Shin; Moon Gi Kang
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Paper Abstract

We propose a frame-rate conversion algorithm using hybrid-search-based motion estimation (ME) and adaptive motion-compensated interpolation (MCI). The ME method uses three search strategies: recursive search, three-step search with predictions, and single predicted search. One of them, which is best suited for the predicted motion type, is adaptively performed on a block basis. This adaptation process improves the accuracy of the estimated motion vectors without increasing the computational load. With the estimated motion vectors, the proposed MCI method reconstructs high-quality frames, without producing block artifacts, by considering multiple motion trajectories. The method utilizes pixel smoothness constraints besides motion-vector reliability when creating and combining the multiple motion-compensated results to remove block artifacts in regions with unreliable motion vectors. Experimental results show that the proposed ME method produces reliable motion vectors that are closer to true motions. Also, the proposed MCI method achieves better image quality than existing algorithms.

Paper Details

Date Published: 1 September 2008
PDF: 13 pages
Opt. Eng. 47(9) 097002 doi: 10.1117/1.2977793
Published in: Optical Engineering Volume 47, Issue 9
Show Author Affiliations
Young Duk Kim, SAMSUNG Electronics Co., Ltd. (Korea, Republic of)
Joonyoung Chang, Yonsei Univ. (Korea, Republic of)
Gun Shik Shin, Yonsei Univ. (Korea, Republic of)
Moon Gi Kang, Yonsei Univ. (Korea, Republic of)

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