Problem area location in an image signal
AssigneeKoninklijke Philips Electronics N.V.
InventorsGerard De Haan, Anna Pelagotti
Life of this patent
Estimating the term…
Abstract
In a method of locating problem areas in an image signal (I), a motion vector field (Df) is estimated for the image signal (I), and edges are detected in the motion vector field (Df). In a corresponding method of interpolating images between existing images (I), image parts are interpolated (MCI) in dependence upon a presence of edges; preferably, an order statistical filtering (med) is used at edges.
Claims6
A method of locating problem areas in an image signal, the method comprising the steps:
- estimating a motion vector field for said image signal;
- and
- detecting edges in the motion vector field,
- wherein said edges detecting step includes:
- comparing motion vectors from mutually different spatial positions,
- and wherein said comparing step includes:
- determining absolute differences in motion vector components of two motion vectors corresponding to two spatially neighboring locations to detect edges in the motion vector field and a size of a covered or uncovered area;
- and
- determining differences in motion vector components of two motion vectors corresponding to said two spatially neighboring locations to determine whether there is covering or whether there is uncovering.
A method of interpolating images between existing images, the method comprising the steps:
- estimating a motion vector field for an image signal;
- detecting edges in the motion vector field;
- and
- interpolating image parts in dependence upon a presence of edges,
- wherein the method further comprises the steps:
- subdividing image blocks at edges into smaller blocks;
- and
- using, for each of the smaller blocks, that motion vector among the motion vectors at opposite sides of an edge, which yields a lowest match error.
A device for locating problem areas in an image signal, the device comprising:
- means for estimating a motion vector field for said image signal;
- and
- means for detecting edges in the motion vector field,
- wherein said edges detecting means comprises:
- means for comparing motion vectors from mutually different spatial positions,
- and wherein said motion vector comparing means comprises:
- means for determining absolute differences in motion vector components of two motion vectors corresponding to two spatially neighboring locations to detect edges in the motion vector field and a size of a covered or uncovered area;
- and
- means for determining differences in motion vector components of two motion vectors corresponding to said two spatially neighboring locations to determine whether there is covering or whether there is uncovering.
A device for interpolating images between existing images, the device comprising:
- means for estimating a motion vector field for an image signal;
- means for detecting edges in the motion vector field;
- and
- means for interpolating image parts in dependence upon a presence of edges,
- wherein the device further comprises:
- means for subdividing image blocks at edges into smaller blocks;
- and
- means for using, for each of the smaller blocks, that motion vector among the motion vectors at opposite sides of an edge, which yields a lowest match error.
Dependencies are inferred from the claim text.