Stabilizing estimate of location of target region inferred from tracked multiple landmark regions of a video image
First Claim
1. In an image processing method for inserting a given pattern at a target region having a particular location with respect to a scene being viewed by an image sensor which produces a series of successive image frames, wherein said scene includes at least two landmark regions displaced in position from one another;
- and wherein said method comprises the computation steps of (a) inferring the size and position of said particular location within each image frame of said scene from the size and position of a first one of said landmark regions represented within each image frame of said scene and (b) independently inferring the size and position of said particular location within each image frame of said scene from the size and position of a second one of said landmark regions represented within each image frame of said scene, whereby there may be a difference in the size and position of said particular location within each image frame of said scene inferred from the size and position of said second one of said landmark regions with respect to the size and position of said particular location within each image frame of said scene inferred from the size and position of said first one of said landmark regions;
the improvement comprising the step of;
c) modifying the size and position of the particular location within one of said image frames of said scene inferred from the size and position of said second one of said landmark regions within that one of said image frames so that it is substantially the same as the size and position of the particular location within that one of said image frames of said scene inferred from the size and position of said first one of said landmark regions.
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Abstract
Any of multiple landmark regions of a scene being viewed by an image sensor are used for interring the location of a target region of the scene in which a pattern is to be inserted in order to avoid the problem of the view of a region being occluded. Because of changes, such as the pointing angle of the sensor, there is a slight difference in size and position in the location of a target region inferred from one landmark region and from another landmark region. this results in a jitter when a first landmark region being used for inferring the location of a target region is replaced by a second landmark region in response to the first landmark region being occluded. This jitter is eliminated by deriving an error-correcting component that compensates for the aforesaid slight difference in size and position in the location of a target region inferred from different landmark regions.
154 Citations
5 Claims
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1. In an image processing method for inserting a given pattern at a target region having a particular location with respect to a scene being viewed by an image sensor which produces a series of successive image frames, wherein said scene includes at least two landmark regions displaced in position from one another;
- and wherein said method comprises the computation steps of (a) inferring the size and position of said particular location within each image frame of said scene from the size and position of a first one of said landmark regions represented within each image frame of said scene and (b) independently inferring the size and position of said particular location within each image frame of said scene from the size and position of a second one of said landmark regions represented within each image frame of said scene, whereby there may be a difference in the size and position of said particular location within each image frame of said scene inferred from the size and position of said second one of said landmark regions with respect to the size and position of said particular location within each image frame of said scene inferred from the size and position of said first one of said landmark regions;
the improvement comprising the step of;c) modifying the size and position of the particular location within one of said image frames of said scene inferred from the size and position of said second one of said landmark regions within that one of said image frames so that it is substantially the same as the size and position of the particular location within that one of said image frames of said scene inferred from the size and position of said first one of said landmark regions. - View Dependent Claims (2, 3, 4, 5)
- and wherein said method comprises the computation steps of (a) inferring the size and position of said particular location within each image frame of said scene from the size and position of a first one of said landmark regions represented within each image frame of said scene and (b) independently inferring the size and position of said particular location within each image frame of said scene from the size and position of a second one of said landmark regions represented within each image frame of said scene, whereby there may be a difference in the size and position of said particular location within each image frame of said scene inferred from the size and position of said second one of said landmark regions with respect to the size and position of said particular location within each image frame of said scene inferred from the size and position of said first one of said landmark regions;
Specification