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    • 49. 发明授权
    • Device and method for compositing video planes
    • 用于合成视频平面的设备和方法
    • US09355493B2
    • 2016-05-31
    • US11967440
    • 2007-12-31
    • Daniel Wong
    • Daniel Wong
    • G06T15/50
    • G06T15/503
    • A device and method of forming a video frame from a video stream made up of a multiplexed plurality of sub-streams is disclosed. The method includes forming a foreground plane, forming a mask that represents opaque pixels in the foreground plane, and forming an underlying plane from at least one of the sub-streams and extracting a transparency value associated with each pixel in the foreground and underlying planes. Only those pixels in the underlying and foreground planes not covered by the mask, are blended in accordance with their associated transparency value in a buffer. The buffer is populated with opaque pixels from the foreground plane, at pixel locations corresponding to the mask.
    • 公开了一种从由多路复用多个子流组成的视频流中形成视频帧的装置和方法。 该方法包括形成前景平面,形成表示前景平面中的不透明像素的掩模,以及从至少一个子流形成底层平面,并提取与前景和下面平面中的每个像素相关联的透明度值。 只有底层和前景平面中没有被掩码覆盖的像素才会根据缓冲区中相关的透明度值进行混合。 在对应于掩模的像素位置处,来自前景平面的不透明像素的缓冲器被填充。