Image data encoding/decoding method and apparatus
AssigneeB1 Insitute of Image Technology, Inc.
InventorKi Baek Kim
Life of this patent
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Abstract
A method of decoding an image, includes obtaining at least one offset for a picture, deriving a variable for scaling for the picture based on the at least one offset, and performing inter prediction based on the variable for scaling for the picture. The at least one offset is defined with a direction of scaling.
Claims8
A method of decoding a 360-degree image performed by an image decoding apparatus, the method comprising:
- receiving, performed by the image decoding apparatus, a bitstream in which the 360-degree image is encoded, wherein the bitstream includes data of an extended 2-dimensional image, the extended 2-dimensional image includes a 2-dimensional image and a predetermined extension region, and wherein the 2-dimensional image is projected from an image with a 3-dimensional projection structure and the 2-dimensional image includes one or more faces;
- reconstructing, performed by the image decoding apparatus, the extended 2-dimensional image based on information on the one or more faces included in the bitstream,
- wherein sample values of the extension region are determined differently according to a padding method selected from a plurality of padding methods,
- wherein the information on the one or more faces comprises information on the padding method,
- characterized by
- the padding method for one face is determined separately from the other face in case the 2-dimensional image includes two or more faces.
A method of encoding a 360-degree image performed by an image encoding apparatus, the method comprising:
- obtaining, performed by the image encoding apparatus, a 2-dimensional image projected from an image with a 3-dimensional projection structure and wherein the 2-dimensional image includes one or more faces;
- obtaining, performed by the image encoding apparatus, an extended 2-dimensional image including the 2-dimensional image and a predetermined extension region;
- encoding, performed by the image encoding apparatus, data of the extended 2-dimensional image and information on the one or more faces into the bitstream,
- wherein sample values of the extension region are determined differently according to a padding method selected from a plurality of padding methods,
- wherein the information on the one or more faces comprises information on the padding method,
- characterize by
- the padding method for one face is determined separately from the other face in case the 2-dimensional image includes two or more faces.
A method of transmitting a bitstream generated by an encoding method of a 360-degree image performed by an image encoding apparatus, the encoding method comprising:
- obtaining, performed by the image encoding apparatus, a 2-dimensional image projected from an image with a 3-dimensional projection structure and wherein the 2-dimensional image includes one or more faces;
- obtaining, performed by the image encoding apparatus, an extended 2-dimensional image including the 2-dimensional image and a predetermined extension region;
- encoding, performed by the image encoding apparatus, data of the extended 2-dimensional image and information on the one or more faces into the bitstream,
- wherein sample values of the extension region are determined differently according to a padding method selected from a plurality of padding methods,
- wherein the information on the one or more faces comprises information on the padding method, and
- characterized by
- the padding method for one face is determined separately from the other face in case the 2-dimensional image includes two or more faces.
Dependencies are inferred from the claim text.