Patent ID: 11949846
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method of 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 one or more faces;
obtaining a residual image by decoding residual information included in the bitstream; and
reconstructing the extended 2-dimensional image based on the residual image,
wherein a size of the extension region is determined based on size information obtained from the bitstream,
wherein whether the extended 2-dimensional image includes the extension region is determined based on information included in the bitstream,
wherein the 3-dimensional projection structure is selectively determined based on identification information, among a plurality of pre-defined 3-dimensional projection structures including a first 3-dimensional projection structure and a second 3-dimensional projection structure, the identification information being obtained from the bitstream,
wherein, in case of the first 3-dimensional projection structure, the size information on the size of the extension region comprises first width information for a left extension region on a left side of the 2-dimensional image and second width information for a right extension region on a right side of the 2-dimensional image and
wherein sample values of the extension region are determined by a padding method where an image characteristic of the extension region is the same as the image characteristic of the face.