Title:
IMAGE ADJUSTMENT DEVICE, IMAGE ADJUSTMENT METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/212212
Kind Code:
A1
Abstract:
A tone adjustment unit assumes that the following relationship is satisfied:
Lo = Do + Da = TD(I) + Da = TL(I)
Where I represents a luminance value normalized with a maximum value of one in first image data, Do represents a luminance value normalized with the maximum value of one in second image data, Da represents a luminance value of ambient light during viewing, Lo represents a luminance value dependent on the effects of the ambient light during viewing, TD(I) represents a tone curve used for conversion, and TL(I) represents a tone curve that takes environment into account. The tone curve TD(I) is adjusted so that a function γ(I) representing an inclination after converting Lo = TL(I) to a double logarithm is non-zero over the entire dynamic range.
Inventors:
OHTSUKA SAKUICHI (JP)
Application Number:
PCT/JP2018/018861
Publication Date:
November 22, 2018
Filing Date:
May 16, 2018
Export Citation:
Assignee:
UNIV KAGOSHIMA (JP)
International Classes:
G09G5/10; G06T5/00; G09G5/00; G09G5/36; H04N1/407; H04N5/20; H04N5/222
Foreign References:
| US20130155330A1 | 2013-06-20 | |||
| JP2009177558A | 2009-08-06 |
Other References:
MANTIUK, RAFAL ET AL.: "Display Adaptive Tone Mapping", PROC. ACM SIGGRAPH, 2008, XP055043632, ISBN: 978-1-4503-0112-1
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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