| 摘要 |
A method of removing the foreground subject (2) and its shadow from a series of image frames including a subject (2) before a colored backing (3) being photographed by a moving camera during a live broadcast. The method employed identify, for each frame, those pixels set to an RGB level of zero, to create an image of colored backing in which the subject area is reduced to black (24). The image of colored backing is smeared (27, 19) to obliterate defined edges of the subject's shadow and to smear (27, 19) the color of backing into the black area previously occupied by the subject to generate a clear frame (20). The clear frame is utilized to compensate for backing luminance and color nonuniformity, thereby preventing visibility of the joining edge of generated windows that extend the backing to the edge of frame.
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