Frame rate conversion system
AssigneeSharp Laboratories of America, Inc.
InventorsXu CHEN, Petrus J.L. VAN BEEK
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Abstract
A system for the conversion of video from one frame rate to a different frame rate. The system includes the application of graphical element and text detection and processing in frame rate up conversion.
Claims26
A system for detecting a graphical element in an image of a series of images comprising:
- (a) a motion compensated error map process that identifies regions of said image that have a value greater than a threshold of the difference between said image and a motion compensated said image based upon said series of images to provide a likelihood map;
- (b) a first filter process based upon said image and a plurality of said series of images other than said image to temporally smooth said likelihood map;
- (c) modifying said likelihood map based upon said first filter process.
The system 15 wherein said second filter process provides said second modified likelihood map to said third filter process which provides a third modified likelihood map.
A system for detecting a graphical element in an image of a series of images comprising:
- (a) a motion compensated error map process that identifies regions of said image that have a value greater than a threshold of the difference between said image and a motion compensated said image based upon said series of images to provide a likelihood map;
- (b) at least one filter to filter said likelihood map based upon anticipated size of said graphical element and temporal characteristics of said graphical element.
A method for a frame rate conversion for a series of images comprising:
- (a) identifying regions of one of said images including textual content with a first mask;
- (b) identifying regions of another one of said images including textual content with a second mask;
- (c) estimating at least one motion vector for said regions of said one of said images corresponding to said first mask;
- (d) modifying said first mask based upon said at least one motion vector and said second mask;
- (e) interpolating an image based upon said modified first mask.
A method for a frame rate conversion for a series of images comprising:
- (a) receiving a first frame of said series of images together with a first mask identifying whether a particular pixel of said first frame belongs to a textual region or a background region;
- (b) receiving a second frame of said series of images together with a second mask identifying whether a corresponding particular pixel of said second frame belongs to a textual region or a background region;
- (c) calculating a pixel of an interpolated frame in a first manner for said series of images when said particular pixel of said first frame belongs to said textual region and said corresponding particular pixel belong to said background region, wherein said first manner uses only the information from either said first frame or said second frame.
Dependencies are inferred from the claim text.