Motion extraction by spatiotemporal filtering of analytic signal derived from images and moving area tracking
✍ Scribed by Kyoji Tanaka; Yoshiaki Shirai
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 973 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0882-1666
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✦ Synopsis
Abstract
We propose a method for tracking a moving object in a specified direction from time sequence images which include multiple moving objects, assuming that a camera rotates to look at the specified object. First, an image analytic signal is generated by spatial‐Hilbert transform. The horizontal and vertical motion of specific velocities are extracted by spatiotemporal filters applied to the analytic signal. Although the impulse response function of a temporal filter for the analytic signal is complex, that of a spatial filter becomes real. The 2‐D motion component is computed from the extracted horizontal motion and the vertical motion. The tracking window is set to the high motion component area. Object tracking is performed by estimating the motion through an α‐β‐γ filter on the window.