Title:
ＨＤＲ画像化におけるレート制御認識リシェーピング
Document Type and Number:
Japanese Patent JP7391214
Kind Code:
B2
Abstract:
Given an input image in a high dynamic range (HDR) which is mapped to a second image in a second dynamic range using a reshaping function, to improve coding efficiency, a reshaping function generator may adjust the codeword range of the HDR input under certain criteria, such as for noisy HDR images with a relatively-small codeword range. An example of generating a scaler for adjusting the HDR codeword range based on the original codeword range and a metric of the percentage of edge-points in the HDR image is provided. The adjusted reshaping function allows for more efficient rate control during the compression of reshaped images.
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Inventors:
Kadu, Harshad
Chii, Gee
Su, Gwan-Mean
Chii, Gee
Su, Gwan-Mean
Application Number:
JP2022529484A
Publication Date:
December 04, 2023
Filing Date:
November 25, 2020
Export Citation:
Assignee:
Dolby Laboratories Licensing Corporation
International Classes:
H04N19/85
Domestic Patent References:
| JP2019530309A | ||||
| JP2016529741A |
Other References:
MINOO, K. et al.,Description of the reshaper parameters derivation process in ETM reference software,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11 23rd Meeting: San Diego, USA, 19-26 February 2016, [JCTVC-W0031],JCTVC-W0031 (version 1),ITU-T,2016年01月11日,: JCTVC-W0031-ETM_ReshaperDescription.docx: pp.1-17
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Osamu Miyazaki
Tadahiko Ito
Osamu Miyazaki