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Global motion–compensated preprocessing algorithm for block-based frame-rate conversion

[+] Author Affiliations
Young Duk Kim

Samsung Electronics Company, Ltd., Media Development Team, System LSI Division, Nongseo-dong Giheung-gu, Yongin-si Gyeonggi-do 446-711, Korea

Joonyoung Chang

Yonsei University, Department of Electrical and Electronic Engineering, 134, Shinchon-Dong, Seodaemoon-Ku, Seoul 120-749, Korea

Moon Gi Kang

Yonsei University, Department of Electrical and Electronic Engineering, 134, Shinchon-Dong, Seodaemoon-Ku, Seoul 120-749, Korea

J. Electron. Imaging. 19(2), 023001 (April 08, 2010). doi:10.1117/1.3373514
History: Received July 15, 2009; Revised February 11, 2010; Accepted February 11, 2010; Published April 08, 2010; Online April 08, 2010
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We propose a global motion (GM) compensated preprocessing algorithm for block-based frame rate conversion (FRC). The proposed method estimates camera motions such as zooms or rotations between two input frames, and accordingly, produces nontranslational GM-free pictures by performing GM compensation with respect to the temporal location where the FRC method reconstructs an intermediate frame. To reduce the computational load, the proposed method first subsamples input images, and then block-wise motion estimation (ME) is performed. With the ME results, the proposed method detects scene changes and nontranslational GMs. This allows us to determine whether to proceed with the GM estimation and compensation processes. The geometric motion model is adopted to describe camera motions with four parameters, and these values are iteratively found on a motion vector (MV) field. Experimental results show that the proposed algorithm achieves significant performance improvements of subsequent FRC methods.

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© 2010 SPIE and IS&T

Citation

Young Duk Kim ; Joonyoung Chang and Moon Gi Kang
"Global motion–compensated preprocessing algorithm for block-based frame-rate conversion", J. Electron. Imaging. 19(2), 023001 (April 08, 2010). ; http://dx.doi.org/10.1117/1.3373514


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