Method and apparatus for reconstructing 360-degree image according to projection format
AssigneeB1 Institute of Image Technology, Inc.
InventorKi Baek KIM
Life of this patent
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Abstract
Disclosed are methods and apparatuses for image data encoding/decoding. A method for decoding a 360-degree image includes 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; adding the generated prediction image to 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. Therefore, the performance of image data compression can be improved.
Claims7
A method for decoding an image, the method comprising:
- receiving information on image partitioning for the image included in a bitstream;
- obtaining a plurality of image partitions included in the image based on the information on image partitioning;
- and
- decoding the plurality of image partitions,
- wherein the reconstructing the image comprises generating a prediction block for a block included in the image and a residual block corresponding to the prediction block,
- wherein each image partition comprises a plurality of default encoding parts, each default encoding part is selected from a plurality of candidate default encoding parts, each candidate default encoding part is composed of one or more encoding sub-units, and
- wherein the bitstream comprises information on rotation of the image.
A method for encoding an image, the method comprising:
- obtaining a plurality of image partitions included in the image, information on image partitioning for the image being encoded into a bitstream;
- and
- encoding the plurality of image partitions into the bitstream,
- wherein the encoding the image comprises generating a prediction block for a block included in the image and a residual block corresponding to the prediction block,
- wherein each image partition comprises a plurality of default encoding parts, each default encoding part is selected from a plurality of candidate default encoding parts, each candidate default encoding part is composed of one or more encoding sub-units, and
- wherein the bitstream comprises information on rotation of the image.
A method for transmitting a bitstream, the method comprising:
- obtaining a plurality of image partitions included in the image, information on image partitioning for the image being encoded into the bitstream;
- encoding the plurality of image partitions into the bitstream;
- and
- transmitting the bitstream,
- wherein the encoding the image comprises generating a prediction block for a block included in the image and a residual block corresponding to the prediction block,
- wherein each image partition comprises a plurality of default encoding parts, each default encoding part is selected from a plurality of candidate default encoding parts, each candidate default encoding part is composed of one or more encoding sub-units, and
- wherein the bitstream comprises information on rotation of the image.
Dependencies are inferred from the claim text.