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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Image Vis Comput. 2009 Nov 1;27(12):1826–1844. doi: 10.1016/j.imavis.2009.02.005

Fig. 7.

Fig. 7

Shown here is an example of the detection of a circular motion. (a) The motion trajectory of an ASL sign. (b) The 2D projection of the sign trajectory. Shown in red is the detected circular motion. (c) The Hough transform result.