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AssigneeApple Inc.
InventorsAdriana Dumitras, James Oliver Normile, Ryan R. Salsbury
Estimating the term…
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.
1-7. (canceled)
A method for pre-filtering an original video sequence, the original video sequence comprising a plurality of frames, each frame comprising a plurality of pixel locations where each pixel location comprises a pixel value, the method comprising:
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19-27. (canceled)
A computer readable storage medium storing a computer program for pre-filtering an original video sequence, the original video sequence comprising a plurality of frames, each frame comprising a plurality of pixel locations where each pixel location comprises a pixel value, the computer program executable by at least one processor, the computer program comprising sets of instructions for:
30-43. (canceled)
A method for pre-filtering a plurality of frames, each frame comprising a plurality of pixel locations, each pixel location comprising a pixel value, the method comprising:
A method for pre-filtering a plurality of frames, the method comprising:
Dependencies are inferred from the claim text.