Title:
METHOD FOR ENHANCING LOW-ILLUMINATION IMAGE
Document Type and Number:
WIPO Patent Application WO/2018/133379
Kind Code:
A1
Abstract:
Provided is a method for enhancing a low-illumination image based on a camera response characteristic, comprising: selecting an exposure model and obtaining a camera response equation model corresponding thereto; determining a parameter of the camera response equation model; estimating an exposure ratio of a multi-exposure image sequence to be generated to an original image so as to generate the multi-exposure image sequence; and performing image fusion on multi-exposure images to obtain a resulting enhanced image having an improved visual effect and less distortion. The method can solve a problem in which existing low-illumination image enhancement algorithms introduce more artifacts while enhancing images,such that a resulting enhanced image has an improved visual effect and less distortion, thereby preserving naturalness of the resulting enhanced image.
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Inventors:
LI GE (CN)
YING ZHENQIANG (CN)
REN YURUI (CN)
YING ZHENQIANG (CN)
REN YURUI (CN)
Application Number:
PCT/CN2017/095931
Publication Date:
July 26, 2018
Filing Date:
August 04, 2017
Export Citation:
Assignee:
UNIV PEKING SHENZHEN GRADUATE SCHOOL (CN)
International Classes:
G06T1/00
Foreign References:
| CN106875352A | 2017-06-20 | |||
| CN101661620A | 2010-03-03 | |||
| US7840066B1 | 2010-11-23 |
Other References:
DU, LIN ET AL.: "High Dynamic Range Image Fusion Based on Camera Response Function", COMPUTER ENGINEERING & SCIENCE, vol. 37, no. 7, 31 July 2015 (2015-07-31), ISSN: 1007-130X
DU, LIN ET AL.: "Research Progress of Camera Response Function Calibration", LASER & INFRARED, vol. 46, no. 1, 31 January 2016 (2016-01-31), ISSN: 1001-5078
MA, K. ET AL.: "Perceptual Quality Assessment for Multi-Exposure Image Fusion", IEEE TRANSACTIONS ON IMAGE PROCESSING, vol. 24, no. 11, 30 November 2015 (2015-11-30), XP011585930
DU, LIN ET AL.: "Camera Response Function Calibration Algorithm Based on Single Frame Image", ACTA OPTICA SINICA, vol. 36, no. 7, 31 July 2016 (2016-07-31)
DU, LIN ET AL.: "Research Progress of Camera Response Function Calibration", LASER & INFRARED, vol. 46, no. 1, 31 January 2016 (2016-01-31), ISSN: 1001-5078
MA, K. ET AL.: "Perceptual Quality Assessment for Multi-Exposure Image Fusion", IEEE TRANSACTIONS ON IMAGE PROCESSING, vol. 24, no. 11, 30 November 2015 (2015-11-30), XP011585930
DU, LIN ET AL.: "Camera Response Function Calibration Algorithm Based on Single Frame Image", ACTA OPTICA SINICA, vol. 36, no. 7, 31 July 2016 (2016-07-31)
Attorney, Agent or Firm:
BEIJING WANXIANGXINYUE INTELLECTUAL PROPERTY OFFICE (CN)
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