Motion estimation for uncovered frame regions
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJonatan Samuelsson, Kenneth Andersson, Clinton Priddle
Life of this patent
Estimating the term…
Abstract
In a motion estimation for a group of at least one image element in a frame of a video sequence, a global motion is determined between the frame and a reference frame. Uncovered groups present in an uncovered region of the frame are identified based on the determined global motion. The global motion is assigned as motion representation for these identified uncovered groups. The assigned motion representation is useful for constructing new frames in the sequence in a frame rate up-conversion.
Claims22
A method of motion estimation for a group of at least one image element in a frame associated with a time instance in a video sequence, said method comprising the steps of:
- determining a representation of a global motion of image element property values from at least a portion of a previous frame associated with a previous time instance in said video sequence to at least a portion of said frame;
- identifying an uncovered group of at least one image element in an uncovered region of said frame based on said global motion representation;
- and assigning said global motion representation to said uncovered group as motion estimation for said uncovered group.
A method of estimating property values of a group of at least one image element in a frame associated with a time instance in a video sequence relative a first reference frame associated with a first different time instance in said video sequence, said method comprising the steps of:
- performing motion estimation for at least one uncovered group in said first reference frame;
- selecting a first reference group from said at least one uncovered group based on a respective motion representation assigned to said at least one uncovered group;
- and
- estimating said property values of said group based on the property values of said first reference group.
A device for motion estimation for a group of at least one image element in a frame associated with a time instance in a video sequence, said device comprises:
- a processor;
- and
- a memory containing instructions executable by said processor, whereby said device is operative to:
- determine a representation of a global motion of image element property values from at least a portion of a previous frame associated with a previous time instance in said video sequence to at least a portion of said frame;
- identify an uncovered group of at least one image element in an uncovered region of said frame based on said global motion representation;
- and
- assign said global motion representation to said uncovered group.
The device according to claim, wherein said device is further operative to provide a motion set comprising, for each group in said at least a portion of said frame, a respective motion representation referring to an associated group in said previous frame, wherein said device is further operative to determine, based on at least a portion of the motion representations of said motion set, said global motion representation.
A device for estimating property values of a group of at least one image element in a frame associated with a time instance in a video sequence relative a first reference frame associated with a first different time instance in said video sequence, said device comprises:
- a processor;
- and
- a memory containing instructions executable by said processor, whereby said device is operative to:
- perform motion estimation for at least one uncovered group in said first reference frame;
- select a first reference group from said at least one uncovered group based on a motion representation assigned to said first reference group;
- and
- determine said property values of said group based on the property values of said first reference group.
Dependencies are inferred from the claim text.