Optical Flow Estimation using Fourier Mellin Transform
Date
2008
Authors
Ho, Huy Tho
Goecke, Roland
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Publisher
Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
In this paper, we propose a novel method of computing the optical flow using the Fourier Mellin Transform (FMT). Each image in a sequence is divided into a regular grid of patches and the optical flow is estimated by calculating the phase correlation of each pair of co-sited patches using the FMT. By applying the FMT in calculating the phase correlation, we are able to estimate not only the pure translation, as limited in the case of the basic phase correlation techniques, but also the scale and rotation motion of image patches, i.e. full similarity transforms. Moreover, the motion parameters of each patch can be estimated to subpixel accuracy based on a recently proposed algorithm that uses a 2D esinc function in fitting the data from the phase correlation output. We also improve the estimation of the optical flow by presenting a method of smoothing the field by using a vector weighted average filter. Finally, experimental results, using publicly available data sets are presented, demonstrating the accuracy and improvements of our method over previous optical flow methods.
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Keywords
Keywords: Artificial intelligence; Computer vision; Correlation methods; Estimation; Feature extraction; Fourier transforms; Hearing aids; Image processing; Image registration; Mathematical transformations; Optical correlation; Parameter estimation; Pattern recogni
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Source
Proceedings of CVPR 2008
Type
Conference paper
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2037-12-31
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