US 12,445,734 B2
Method and apparatus for generating high-dynamic-range image, and electronic device
Yanxin Shen, Fuzhou (CN); Ning Luo, Fuzhou (CN); and Huimin Song, Fuzhou (CN)
Assigned to Rockchip Electronics Co., Ltd., Fujian (CN)
Filed by Rockchip Electronics Co., Ltd., Fuzhou (CN)
Filed on Nov. 3, 2023, as Appl. No. 18/386,617.
Claims priority of application No. 202211386752.7 (CN), filed on Nov. 7, 2022.
Prior Publication US 2024/0155248 A1, May 9, 2024
Int. Cl. H04N 23/73 (2023.01); H04N 23/11 (2023.01); H04N 23/71 (2023.01); H04N 23/741 (2023.01)
CPC H04N 23/73 (2023.01) [H04N 23/741 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating a high-dynamic-range image, comprising:
obtaining a long-exposure visible-light image, a long-exposure near-infrared image, a short-exposure visible-light image, and a short-exposure near-infrared image of a target scene, wherein the short-exposure near-infrared image and the long-exposure near-infrared image are not overexposed, wherein bright regions of the short-exposure visible-light image are not overexposed, wherein the long-exposure visible-light image and the long-exposure near-infrared image spatially correspond to each other, and wherein the short-exposure visible-light image and the short-exposure near-infrared image spatially correspond to each other;
performing brightness reconstruction on an overexposed region of the long-exposure visible-light image based on the long-exposure near-infrared image, the short-exposure visible-light image, and the short-exposure near-infrared image;
performing chromaticity reconstruction on the overexposed region of the long-exposure visible-light image based on the short-exposure visible-light image; and
generating the high-dynamic-range image based on the long-exposure visible-light image, and results of the brightness reconstruction and the chromaticity reconstruction for the long-exposure visible-light image.