# US 12,225,212 B2 · Image encoding/decoding method and apparatus

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- Number: US 12,225,212 B2
- Document ID: US12225212B2
- Status: Granted
- Kind: B2
- Application number: 16/354,331
- Filed: 2019-03-15
- Published: 2019-10-10
- Granted: 2025-02-11
- Earliest claimed: 2018-03-15
- Assignees: University-Industry Cooperation Foundation of Kyung Hee University
- Applicants: University-Industry Cooperation Group of Kyung Hee University
- Inventors: Gwang Hoon Park; Dae Young Lee; Tae Hyun Kim
- Web page: https://patentgrep.com/patent/US12225212B2

## CPC

- H04N 19/18: the unit being a set of transform coefficients
- G06T 3/02: Affine transformations (for image registration G06T3/147; for image mosaicing G06T3/4038)
- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/109: among a plurality of temporal predictive coding modes
- H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
- H04N 19/154: Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion (use of rate-distortion criteria H04N19/147)
- H04N 19/573: Motion compensation with multiple frame prediction using two or more reference frames in a given prediction direction
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/527: Global motion vector estimation
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

There is provided a method of decoding/encoding an image. The method of the present invention includes: receiving a transform picture reference skip flag; determining whether the transform picture reference skip flag is on or off; and performing inter prediction on a current block on the basis of the transform picture reference skip flag.

## Claims

### Claim 1

A method of decoding an image, the method comprising:
obtaining global motion information;
generating, on the basis of the global motion information, a warping region; and
generating a corrected warping region by correcting a pixel value of the pixel within the warping region using neighboring pixels,
wherein the pixel value of the pixel within the warping region is corrected by using the global motion information and a gradual difference between values of the different neighboring pixels adjacent to the pixel within the warping region.

### Claim 2 (depends on 1)

The method of claim 1, wherein the global information includes affine transform information.

### Claim 3

A method of encoding an image, the method comprising:
determining global motion information;
generating, on the basis of the global motion information, a warping region; and
generating a corrected warping region by correcting a pixel value of the pixel within the warping region using neighboring pixels,
wherein the pixel value of the pixel within the warping region is corrected by using the global motion information and a gradual difference between values of the different neighboring pixels adjacent to the pixel within the warping region.

### Claim 4

A non-transitory computer readable recording medium storing a bitstream generated by a method of encoding an image, the method comprising:
determining global motion information;
generating, on the basis of the global motion information, a warping region; and
generating a corrected warping region by correcting a pixel value of the pixel within the warping region using neighboring pixels,
wherein the pixel value of the pixel within the warping region is corrected by using the global motion information and a gradual difference between values of the different neighboring pixels adjacent to the pixel within the warping region.