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Proceedings Paper

FFT-based 4-parameter global motion estimation
Author(s): Zhengbing Zhang; Zhenhua Xia; Xiaodong Xiong; Guangxi Zhu
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Paper Abstract

Motion estimation and compensation play important roles in video coding. The most commonly used motion estimation technique is block matching. In recent years, the global motion compensation (GMC) is paid great attentions because it is an important tool for a variety of video processing applications including for instance registration, segmentation and video coding. The phase correlation is a typical global motion estimation (GME) method in frequency domain. In this paper, a new 4-parameter GME method is proposed based on the Fourier transform properties of the tow images before and after global motion. At first, the scale and rotation parameters of the affine transform are estimated according to the formulas derived in this paper. Then the effect of scale and rotation of the affine transform are corrected with the estimated parameters. After that, the well-known phase correlation technique is used to determine the two shift parameters. An algorithm according to this principle is proposed in this paper, and simulation results show that the 4 affine parameters can be exactly estimated with our new method.

Paper Details

Date Published: 11 January 2007
PDF: 6 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62790S (11 January 2007); doi: 10.1117/12.725107
Show Author Affiliations
Zhengbing Zhang, Yangtze Univ. (China)
Huazhong Univ. of Science and Technology (China)
Zhenhua Xia, Yangtze Univ. (China)
Xiaodong Xiong, Yangtze Univ. (China)
Guangxi Zhu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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