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.
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申请公布号 |
US2008284904(A1) |
申请公布日期 |
2008.11.20 |
申请号 |
US20080107072 |
申请日期 |
2008.04.21 |
申请人 |
DUMITRAS ADRIANA;NORMILE JAMES OLIVER;SALSBURY RYAN R |
发明人 |
DUMITRAS ADRIANA;NORMILE JAMES OLIVER;SALSBURY RYAN R. |
分类号 |
H04N11/02;G06K9/00;H04N5/21;H04N7/26;H04N9/804 |
主分类号 |
H04N11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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