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US 11,889,102 B2Granted
Filtering method for removing blocking artifact and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsHuanbang Chen, Sixin Lin, Haitao Yang, Shan Gao
Life of this patent
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Abstract
The present invention relates to the field of video image processing, and provides a filtering method and an apparatus, to resolve a problem that subjective quality and objective quality of an image deteriorate because filtering processing cannot be performed on internal blocks of a non-translational motion prediction unit.
Claims15
A method for performing filtering processing on an affine image block that is one of a plurality of coding blocks of an image, wherein the affine image block is divided into two or more affine motion subunits, the method comprising:
- obtaining pixel values of a first affine motion subunit and pixel values of a second affine motion subunit, wherein the first affine motion subunit and the second affine motion subunit are adjacent to a filtering boundary and in the two or more affine motion subunits;
- and
- performing filtering processing on pixels adjacent to the filtering boundary based on a boundary strength value of the filtering boundary, the pixel values of the first affine motion subunit, and the pixel values of the second affine motion subunit;
- wherein the boundary strength value of the filtering boundary is set to 1 when:
- the first affine motion subunit has two motion vectors that correspond to a same reference image;
- the second affine motion subunit has two motion vectors that correspond to the same reference image;
- (a) a difference between horizontal components or vertical components of two motion vectors that corresponds to a forward reference candidate list (list0) is greater than or equal to a motion vector difference threshold T, or a difference between horizontal components or vertical components of two motion vectors that corresponds to a backward reference candidate list (list1) is greater than or equal to the motion vector difference threshold T;
- and
- (b) a difference between horizontal components or vertical components of a motion vector that corresponds to a forward reference candidate list (list0) and that is of the first affine motion subunit and a motion vector that corresponds to a backward reference candidate list (list1) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T, or a difference between horizontal components or vertical components of a motion vector that corresponds to a backward reference candidate list (list1) and that is of the first affine motion subunit and a motion vector that corresponds to a forward reference candidate list (list0) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T.
6 more elements
An apparatus for performing filtering processing on an affine image block that is one of a plurality of coding blocks of an image, wherein the affine image block is divided into two or more affine motion subunits, and the apparatus comprises:
- a processor, configured to:
- obtain pixel values of a first affine motion subunit and pixel values of a second affine motion subunit, wherein the first affine motion subunit and the second affine motion subunit are adjacent to a filtering boundary and in the two or more affine motion subunits;
- and
- perform filtering processing on pixels adjacent to the filtering boundary based on a boundary strength value of the filtering boundary, the pixel values of the first affine motion subunit, and the pixel values of the second affine motion subunit;
- wherein the boundary strength value of the filtering boundary is set to 1 when:
- the first affine motion subunit has two motion vectors that correspond to a same reference image;
- the second affine motion subunit has two motion vectors that correspond to the same reference image;
- (a) a difference between horizontal components or vertical components of two motion vectors that corresponds to a forward reference candidate list (list0) is greater than or equal to a motion vector difference threshold T, or a difference between horizontal components or vertical components of two motion vectors that corresponds to a backward reference candidate list (list1) is greater than or equal to the motion vector difference threshold T;
- and
- (b) a difference between horizontal components or vertical components of a motion vector that corresponds to a forward reference candidate list (list0) and that is of the first affine motion subunit and a motion vector that corresponds to a backward reference candidate list (list1) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T, or a difference between horizontal components or vertical components of a motion vector that corresponds to a backward reference candidate list (list1) and that is of the first affine motion subunit and a motion vector that corresponds to a forward reference candidate list (list0) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T.
7 more elements
A non-transitory computer readable medium storing instructions which when executed on a processor cause the processor to perform a method for performing filtering processing on an affine image block that is one of a plurality of coding blocks of an image, wherein the affine image block is divided into two or more subunits, the method comprising:
- obtaining pixel values of a first affine motion subunit and pixel values of a second affine motion subunit, wherein the first affine motion subunit and the second affine motion subunit are adjacent to a filtering boundary and in the two or more affine motion subunits;
- and
- performing filtering processing on pixels adjacent to the filtering boundary based on a boundary strength value of the filtering boundary, the pixel values of the first affine motion subunit, and the pixel values of the second affine motion subunit;
- wherein the boundary strength value of the filtering boundary is set to 1 when:
- the first affine motion subunit has two motion vectors that correspond to a same reference image;
- the second affine motion subunit has two motion vectors that correspond to another same reference image;
- and
- (a) a difference between horizontal components or vertical components of two motion vectors that corresponds to a forward reference candidate list (list0) is greater than or equal to a motion vector difference threshold T, or a difference between horizontal components or vertical components of two motion vectors that corresponds to a backward reference candidate list (list1) is greater than or equal to the motion vector difference threshold T;
- and
- (b) a difference between horizontal components or vertical components of a motion vector that corresponds to a forward reference candidate list (list0) and that is of the first affine motion subunit and a motion vector that corresponds to a backward reference candidate list (list1) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T, or a difference between horizontal components or vertical components of a motion vector that corresponds to a backward reference candidate list (list1) and that is of the first affine motion subunit and a motion vector that corresponds to a forward reference candidate list (list0) and that is of the second affine motion subunit is greater than or equal to the motion vector difference threshold T.
7 more elements
Dependencies are inferred from the claim text.