US 12,262,001 B2
Image encoding/decoding image method and device, and recording medium storing bit stream
Jung Won Kang, Daejeon (KR); Hyun Suk Ko, Daejeon (KR); Sung Chang Lim, Daejeon (KR); Jin Ho Lee, Daejeon (KR); Ha Hyun Lee, Seoul (KR); Dong San Jun, Daejeon (KR); Seung Hyun Cho, Daejeon (KR); Hui Yong Kim, Daejeon (KR); Jin Soo Choi, Daejeon (KR); Gwang Hoon Park, Seongnam-si (KR); Tae Hyun Kim, Hwaseong-si (KR); and Dae Young Lee, Ansan-si (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR); and University-Industry Cooperation Group of Kyung Hee University, Yongin-si (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR); and University-Industry Cooperation Group of Kyung Hee University, Yongin-si (KR)
Filed on Oct. 2, 2023, as Appl. No. 18/479,313.
Application 18/479,313 is a continuation of application No. 17/724,818, filed on Apr. 20, 2022, granted, now 11,825,077.
Application 17/724,818 is a continuation of application No. 17/036,162, filed on Sep. 29, 2020, granted, now 11,343,490, issued on May 24, 2022.
Application 17/036,162 is a continuation of application No. 16/348,522, granted, now 10,848,758, issued on Nov. 24, 2020, previously published as PCT/KR2017/013377, filed on Nov. 22, 2017.
Claims priority of application No. 10-2016-0155814 (KR), filed on Nov. 22, 2016; and application No. 10-2016-0155815 (KR), filed on Nov. 22, 2016.
Prior Publication US 2024/0031559 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/139 (2014.01); H04N 19/105 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/172 (2014.01); H04N 19/176 (2014.01); H04N 19/182 (2014.01); H04N 19/46 (2014.01); H04N 19/52 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/182 (2014.11); H04N 19/46 (2014.11); H04N 19/52 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An image encoding method performed by an image encoding apparatus, the method comprising:
generating geometric transform parameters based on geometric transform information;
generating a predicted block of a current block based on a reference picture and the geometric transform parameters; and
encoding information indicating whether the geometric transform parameters are present for the reference picture or not,
wherein,
the geometric transform information comprises at least one of transfer modification information, size modification information and rotation modification information, and
the generating the geometric transform parameters comprises:
in response to the geometric transform information comprising the transfer modification information, determining movement parameters of the geometric transform parameters based on the transfer modification information, and
in response to the geometric transform information comprising the size modification information and the rotation modification information, determining zooming and rotation parameters of the geometric transform parameters based on the size modification information and the rotation modification information, and
wherein,
a predicted pixel in the predicted block is generated by determining a reference pixel in the reference picture,
the reference pixel is determined based on a current location of the current block and the geometric transform parameters,
when a location of the reference pixel is within the reference picture, the reference pixel is used for generating the predicted pixel, and
when the location the reference pixel is not within the reference picture, a pixel within the reference picture that is closest to the reference pixel is used for generating the predicted pixel.