Sample adaptive offset filtering method for reconstructed projection-based frame that employs projection layout of 360-degree virtual reality projection
AssigneeMediatek Inc.
InventorsSheng-Yen Lin, LIN LIU, Jian-Liang Lin
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Abstract
A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame includes: obtaining at least one padding pixel in a padding area that acts as an extension of a face boundary of a first projection face, and applying SAO filtering to a block that has at least one pixel included in the first projection face. In the reconstructed projection-based frame, there is image content discontinuity between the face boundary of the first projection face and a face boundary of a second projection face. The at least one padding pixel is involved in the SAO filtering of the block.
Claims23
A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame that comprises a plurality of projection faces packed in a projection layout of a 360-degree Virtual Reality (360 VR) projection from which a 360-degree image content of a sphere is mapped onto the projection faces, comprising:
- obtaining, by an SAO filter, at least one padding pixel in a padding area that acts as an extension of one face boundary of a first projection face, wherein the projection faces packed in the reconstructed projection-based frame comprise the first projection face and a second projection face;
- and in the reconstructed projection-based frame, said one face boundary of the first projection face connects with one face boundary of the second projection face, and there is image content discontinuity between said one face boundary of the first projection face and said one face boundary of the second projection face;
- and
- applying SAO filtering to a block, wherein the block has at least one pixel included in the first projection face, and said at least one padding pixel in the padding area is involved in said SAO filtering of the block.
A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame that comprises at least one projection face packed in a projection layout of a 360-degree Virtual Reality (360 VR) projection from which a 360-degree image content of a sphere is mapped onto the projection faces, comprising:
- obtaining, by an SAO filter, at least one padding pixel in a padding area that acts as an extension of one face boundary of a projection face packed in the reconstructed projection-based frame, wherein said one face boundary of the projection face is a part of one picture boundary of the reconstructed projection-based frame;
- and
- applying SAO filtering to a block, wherein the block has at least one pixel included in the projection face, and said at least one padding pixel in the padding area is involved in said SAO filtering of the block.
A sample adaptive offset (SAO) filtering method for a reconstructed projection-based frame that comprises a plurality of projection face packed in a projection layout of a 360-degree Virtual Reality (360 VR) projection from which a 360-degree image content of a sphere is mapped onto the projection faces, comprising:
- obtaining, by an SAO filter, at least one padding pixel in a padding area that acts as an extension of one picture boundary of a first projection face packed in the reconstructed projection-based frame, wherein the projection faces packed in the reconstructed projection-based frame comprise the first projection face and a second projection face;
- and in the reconstructed projection-based frame, said one face boundary of the first projection face connects with one face boundary of the second projection face, and there is image content continuity between said one face boundary of the first projection face and said one face boundary of the second projection face;
- and
- applying SAO filtering to a block, wherein the block has at least one pixel included in the projection face, and said at least one padding pixel in the padding area is involved in said SAO filtering of the block.
Dependencies are inferred from the claim text.