Video matting based on foreground-background constraint propagation
A technology of background and foreground, applied in the field of video image matting method and device, can solve problems such as huge complexity
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[0019] Apart from the inventive concept, the elements shown in the drawings are known and will not be described in detail. For example, familiarity with digital image processing is assumed and not described here, other than the inventive concept. It should also be noted that embodiments of the invention may be implemented using various combinations of hardware and software. Finally, the same reference numbers in the figures denote similar elements.
[0020] In general, image matting methods process an input image I assumed to be a composite of a foreground image F and a background image B. The color of the i-th pixel is assumed to correspond to the foreground F i and background B i Linear combinations of colors or intensities:
[0021] I i = α i f i +(1-α i )B i , (1)
[0022] where α i is the foreground opacity of the i-th pixel and 0≤α≤1. Not all quantities on the right-hand side of Equation 1 are known. Thus, for a three-channel c...
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