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IMAGE ADJUSTMENT DEVICE, IMAGE ADJUSTMENT METHOD, AND PROGRAM NEW

外国特許コード F190009764
整理番号 (S2017-0745-N0)
掲載日 2019年5月7日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP018861
国際公開番号 WO 2018212212
国際出願日 平成30年5月16日(2018.5.16)
国際公開日 平成30年11月22日(2018.11.22)
優先権データ
  • 特願2017-099165 (2017.5.18) JP
発明の名称 (英語) IMAGE ADJUSTMENT DEVICE, IMAGE ADJUSTMENT METHOD, AND PROGRAM NEW
発明の概要(英語) 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.
従来技術、競合技術の概要(英語) BACKGROUND ART
Dynamic range, the luminance of the maximum value and minimum value of the width of the means of (ratio). In recent years, an image having a wide dynamic range and the imaging, when such an image is also referred to as HDR(High Dynamic Range). In the HDR image, the dynamic range is for example (1/6000) and 6000:1, the luminance value of 16 for example is represented by one bit.
On the other hand, in a typical display of a dynamic range can be expressed as the width of the image is called image SDR(Standard Dynamic Range). SDR image, the dynamic range is, for example 20:1 (1/20) and, for example 8 luminance values represented by one bit.
In recent years, with the development of mobile device or the like, a dark room in which the display is assumed to be displayed by using the HDR and the HDR image of a movie or the like, under a bright environment such as a display screen of the mobile device using the SDR has been increasing demand for viewing. Therefore, the input HDR image, the display screen can be displayed with the brightness range can be expressed by the image processing apparatus for generating an image is disclosed (for example, see Patent Document 1) respectively.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • KAGOSHIMA UNIVERSITY
  • 発明者(英語)
  • OHTSUKA Sakuichi
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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