Image data encoding/decoding method and apparatus
AssigneeB1 Institute of Image Technology, Inc.
InventorKi Baek Kim
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Abstract
Disclosed is an image data encoding/decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format.
Claims6
A method for decoding a 360-degree image, the method comprising:
- receiving a bitstream in which the 360-degree image is encoded, the bitstream including data of an extended 2-dimensional image, the extended 2-dimensional image including a 2-dimensional image and a predetermined extension region, and the 2-dimensional image being projected from an image with a 3-dimensional projection structure and including at least one face;
- and
- reconstructing the extended 2-dimensional image by decoding the data of an extended 2-dimensional image,
- wherein a size of the extension region is determined based on width information indicating a width of the extension region, the width information being obtained from the bitstream,
- wherein sample values of the extension region are determined differently according to a padding method selected from a plurality of padding methods, and
- wherein the plurality of padding methods includes at least a first padding method which horizontally copies the sample values of the face to the sample values of the extension region, a sample of the face and a corresponding samples of the extension region being located horizontally.
A method for encoding a 360-degree image, the method comprising:
- obtaining a 2-dimensional image projected from an image with a 3-dimensional projection structure and including at least one face;
- obtaining an extended 2-dimensional image including the 2-dimensional image and a predetermined extension region;
- and
- encoding data of the extended 2-dimensional image into a bitstream in which the 360-degree image is encoded,
- wherein a size of the extension region is encoded based on width information indicating a width of the extension region, the width information being encoded 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, and
- wherein the plurality of padding methods includes at least a first padding method which horizontally copies the sample values of the face to the sample values of the extension region, a sample of the face and a corresponding sample of the extension region being located horizontally.
A non-transitory computer-readable recording medium storing a bitstream that is generated by a method for encoding a 360-degree image, the method comprising:
- obtaining a 2-dimensional image projected from an image with a 3-dimensional projection structure and including at least one face;
- obtaining an extended 2-dimensional image including the 2-dimensional image and a predetermined extension region;
- and
- encoding data of the extended 2-dimensional image into a bitstream in which the 360-degree image is encoded,
- wherein a size of the extension region is encoded based on width information indicating a width of the extension region, the width information being encoded 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, and
- wherein the plurality of padding methods includes at least a first padding method which horizontally copies the sample values of the face to the sample values of the extension region, a sample of the face and a corresponding sample of the extension region being located horizontally.
Dependencies are inferred from the claim text.