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1. 发明公开

EP2833317A1 IMAGE DISPLAY DEVICE AND/OR METHOD THEREFOR 有权
标题翻译： BILDANZEIGIGORRIGHUNG UND / ODER VERFAHRENDAFÜR
公开(公告)号：EP2833317A1
公开(公告)日：2015-02-04
申请号：EP12872320.2
申请日：2012-08-29
申请人： EIZO Corporation
发明人： ABE, Reo , NAKAO, Masashi , HIGASHI, Masafumi
IPC分类号： G06T5/00 , H04N5/66
CPC分类号： G09G5/02 , G06T5/008 , G06T5/009 , G06T5/20 , G06T2207/20208 , G09G2320/0626 , G09G2320/066 , G09G2320/0673 , H04N5/66 , H04N9/68
摘要： An object is to improve the visibility of the dark portion and to prevent the degradation of image quality caused by excessive correction. A reflectance calculation unit 27 is storing a parameter RGain for adjusting the amplitude of a reflectance component R. An illumination light correction unit 25 generates a corrected illumination light component L1 from an illumination light component L and a formula L1 = (log(LAmp*L+1))/(log(LAmp+1)). An image resynthesis unit 29 obtains a corrected illumination light component L' from L' = LGain*L1 + (1-LGain)*L. The image resynthesis unit 29 also calculates a corrected image Iout from the corrected illumination light component L' and the corrected reflectance R', as well as from a formula Iout = exp(logL' + RGain(logI-logL)). The value of the corrected illumination light component (L') is determined based on the ratio (LGain) at which the output value of the correction function (L1) and the original illumination light component (L) are combined. Thus, it is possible to obtain a natural image while maintaining contrast to some extent.
摘要翻译：目的是提高黑暗部分的可视性，并防止由过度校正引起的图像质量下降。反射率计算单元27存储用于调整反射分量R的振幅的参数RGain。照明光校正单元25从照明光分量L产生校正后的照明光分量L1，并且公式L1 =（log（LAmp * L 1））/（日志（灯+ 1））。图像再合成部29从L'= LGain * L1 +（1-LGain）* L求出修正后的照明光分量L'。图像合成单元29还根据校正后的照明光分量L'和校正反射率R'以及公式Iout = exp（logL'+ RGain（logI-logL））计算校正图像Iout。基于校正功能（L1）的输出值和原始照明光分量（L）的组合比（LGain）来确定校正后的照明光分量（L'）的值。因此，可以在一定程度上保持对比度的同时获得自然图像。

2. 发明公开

EP2833355A1 GRAY-LEVEL CORRECTION METHOD, THRESHOLD DETERMINATION DEVICE FOR EPSILON-FILTER, AND METHOD THEREFOR 有权
标题翻译：用于EPSILON-FILTER的灰度级校正方法，阈值确定装置及其方法
公开(公告)号：EP2833355A1
公开(公告)日：2015-02-04
申请号：EP12872830.0
申请日：2012-10-09
申请人： EIZO Corporation
发明人： ABE, Reo , NAKAO, Masashi , OKUNO, Akihiko
IPC分类号： G09G5/02 , G06T5/00 , G09G5/00 , H04N1/407 , H04N5/20
CPC分类号： G06T5/10 , G06T5/008 , G06T5/20 , G09G5/02 , G09G2360/144 , G09G2360/16 , H04N1/407 , H04N5/202
摘要： An object is to correct gradations in such a manner that both halo reduction effect and Retinex calculation effect are satisfied. Each JND value corresponding to each obtained luminance value to be assigned to each unit gradation of a panel is obtained. A pixel value corresponding to the each JND value is obtained for each of the unit gradations of the panel ( Fig. 3B ). A threshold ε is obtained by inverse gamma-correcting the ratio between discernible JND values corresponding to the unit gradations of the panel and the maximum output value of the panel ( Fig. 3C ). Linear function-based approximations are obtained using least squares ( Fig. 3D ). The threshold ε is determined as an increasing function of a pixel value on the basis of the allowable number of JND steps. The threshold ε is changed using this function. The threshold ε can be changed according to the center pixel value.
摘要翻译：目的在于以满足晕圈减少效果和Retinex计算效果的方式来校正灰度。获得与要分配给面板的每个单位灰度的每个获得的亮度值相对应的每个JND值。对于面板的每个单位灰度获得与每个JND值对应的像素值（图3B）。阈值ε通过逆伽马校正与面板的单位灰度和面板的最大输出值相对应的可辨别的JND值之间的比率（图3C）而获得。使用最小二乘法获得线性函数逼近（图3D）。阈值ε根据允许的JND步数确定为像素值的递增函数。阈值ε使用此函数进行更改。阈值ε可以根据中心像素值而改变。

3. 发明授权

EP2833355B1 GRAY-LEVEL CORRECTION METHOD, THRESHOLD DETERMINATION DEVICE FOR EPSILON-FILTER, AND METHOD THEREFOR 有权
公开(公告)号：EP2833355B1
公开(公告)日：2020-08-19
申请号：EP12872830.0
申请日：2012-10-09
申请人： EIZO Corporation
发明人： ABE, Reo , NAKAO, Masashi
IPC分类号： G06T5/00 , G06T5/20 , G09G5/02 , H04N1/407 , H04N5/202 , G09G5/00

4. 发明授权

EP2833317B1 IMAGE DISPLAY DEVICE AND/OR METHOD THEREFOR 有权
公开(公告)号：EP2833317B1
公开(公告)日：2020-02-19
申请号：EP12872320.2
申请日：2012-08-29
申请人： EIZO Corporation
发明人： ABE, Reo , NAKAO, Masashi , HIGASHI, Masafumi
IPC分类号： G06T5/00 , H04N5/66

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