Feature Extraction and Image Processing for Computer Vision, 4th Edition

9.4. Moving feature extraction and description

9.4.1. Moving (biological) shape analysis

If we are to find and recognise moving shapes the approach depends on their basic nature. If the shape is that of a man-made object, then we can deploy the object detection approaches of Section 9.2 and the tracking approaches of Section 9.3 so as to derive a trajectory from which the motion can be determined. Certainly these techniques can operate at high speed, especially when compared with later approaches but can lack an explicit model of the tracked object. The tracking procedure does depend on appearance, and viewpoint invariant approaches are those which can recognise an object irrespective of the pose of the object relative to the direction ...