Method and apparatus for tracking the motion of image content in a video frames sequence using sub-pixel resolution motion estimation

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United States of America Patent

PATENT NO 9792696
SERIAL NO

14942923

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Abstract

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The motion of image content such as a point of interest in a video frames sequence is tracked using sub-pixel resolution motion estimation in forward and/or backward direction. The motion of image content or a point of interest between a reference frame and a following frame is estimated, starting from an integer pixel position in the reference frame. If the motion vector has a position between integer pixel positions, the coordinates of that motion vector are replaced by an adjacent integer pixel position in the following or previous frame, and the error value between these coordinates and the replacement coordinates is stored. Thereafter the following or previous frame is defined as the current frame, the motion of the object is estimated between the replacement coordinates in the current frame and a following frame, and the stored error value is added in opposite direction to the corresponding motion vector, so as to get a corresponding precise motion vector. If the precise motion vector has a position between integer pixel positions in the following or previous frame, its coordinates are replaced by an adjacent integer pixel position in the following or previous frame, and the corresponding error value is stored, and so on.

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Patent Owner(s)

Patent OwnerAddress
INTERDIGITAL VC HOLDINGS INC200 BELLEVUE PARKWAY SUITE 300 WILMINGTON DE 19809

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hepper, Dietmar Hannover, DE 27 439

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