7Motion Analysis
In order to analyze the change of the image information or moving objects, an image sequence (also known as motion pictures) should be used. Image sequence is a composition of a series of consecutive time variant 2-D (space) images or is often considered as a kind of 3-D images that can be expressed as f(x, y, t). Compared to the still image f(x, y), the time variable t has been added. When t takes a certain value, an image (a frame) in the sequence is obtained. Different from a single image, the image sequence (video is one kind of commonly used and will be used in the following) is continuously collected to reflect the change of moving objects and change of scenery. On the other hand, objective things are constantly moving ...
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