Abstract
Standard approaches to motion analysis assume that the optic flow
is smooth; such techniques have trouble dealing with occlusion
boundaries. The image sequence can be decomposed into a set of
overlapping layers, where each layer's motion is described by a smooth
flow field. The discontinuities in the description are then attributed
to object opacities rather than to the flow itself, mirroring the
structure of the scene. A set of techniques is devised for segmenting
images into coherently moving regions using affine motion analysis and
clustering techniques. It is possible to decompose an image into a set
of layers along with information about occlusion and depth ordering. The
techniques are applied to a flower garden sequence. The scene can be
analyzed into four layers, and, the entire 30-frame sequence can be
represented with a single image of each layer, along with associated
motion parameters
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