具有亮度自适应的数码相机再现模型  

The Digital Camera Reproduction Model with Brightness Adaptation

作　　者：刘莹 LIU Ying(Guanghua College of Changchun,Changchun 130033,China)

机构地区：[1]长春光华学院,长春130033

出　　处：《长春工程学院学报（自然科学版）》2020年第1期110-113,共4页Journal of Changchun Institute of Technology：Natural Sciences Edition

摘　　要：根据光谱辐射数据提出了一种算法,用于从光电转换光谱函数(OECSFs)获得镜头光圈N的不同值的相机光电转换功能光谱(相机OECFs)。在逆OECF的线性范围内工作,我们发现斜率与透镜孔径函数由二阶多项式拟合,这也发生在偏移与镜头光圈功能之间。因此,我们将在基础相机再现模型中引入具有亮度适应性的逆OECFs函数运算,其中包括原始RGB空间和CIE-XYZ空间之间的三维变换,提出具有亮度自适应的数码相机再现模型,从而开启了将任何数码相机转换为绝对远程色度计的可能性。Based on the spectral radiation data,an algorithm is proposed for obtaining photoelectric conversion spectra function(camera OECFs)of different values of lens aperture N from photoelectric conversion spectral functions(OECSFs).Working within the linear range of the inverse OECF,it can be found that the slope and lens aperture functions are fitted by a second-order polynomial,which also occurs between the offset and the lens aperture function.Therefore,the brightness-adaptive inverse OECFs function algorithm into the basic camera reproduction model can be introduced,which includes the three-dimensional transformation between the original RGB space and the CIE-XYZ space,and proposes a brightness-adaptive digital camera reproduction model to open the possibility of converting any digital camera into an absolute remote colorimeter.

关 键 词：亮度自适应 光电转换光谱函数 原始RGB空间 CIE-XYZ空间 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]