发明名称 Pre-processing method and system for data reduction of video sequences and bit rate reduction of compressed video sequences using spatial filtering
摘要 Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. Also, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. Pre-processing may include spatial anisotropic diffusion filtering such as Perona-Malik filtering, Fallah-Ford filtering, or omni-directional filtering that extends Perona-Malik filtering to perform filtering in at least one diagonal direction. Pre-processing may also include performing filtering differently on a foreground region than on a background region of a video frame. This method includes identifying pixel locations having pixel values matching characteristics of human skin and determining a bounding shape for each contiguous grouping of matching pixel locations. The foreground region is comprised of pixel locations contained in a bounding shape and the background region is comprised of all other pixel locations.
申请公布号 US7430335(B2) 申请公布日期 2008.09.30
申请号 US20030640944 申请日期 2003.08.13
申请人 APPLE INC 发明人 DUMITRAS ADRIANA;NORMILE JAMES OLIVER;SALSBURY RYAN R.
分类号 G06K9/40;G06K9/00;H04N5/21;H04N7/12;H04N7/26;H04N9/804 主分类号 G06K9/40
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