广色域多基色显示系统的驱动图像生成方法  

Production of Driven Images for Wide-Color-Gamut Multi-Primary Display Systems

作　　者：李亚生[1] 廖宁放[1] 李玉梅[1] 李松霖 吴文敏[1] 范秋梅[1] Li Yasheng;Liao Ningfang;Li Yumei;Li Songlin;Wu Wenmin;Fan Qiumei(State Key Discipline Laboratory of Color Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;Leyard Optoelectronics Co.,Ltd.,Beijing 100091,China)

机构地区：[1]北京理工大学颜色科学与工程国家专业实验室,北京100081 [2]利亚德光电股份有限公司,北京100091

出　　处：《光学学报》2023年第1期265-272,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61975012)。

摘　　要：多基色显示是广色域显示技术的重要发展方向,但多基色显示系统目前面临着高分辨率、高帧率多基色驱动图像的获取问题。提出一种基于广色域RGB相机的多基色驱动图像生成方法。以实际多基色LED点阵显示系统为例,首先建立了显示系统的n基色空间与标准CIE XYZ空间的转换模型,即正向转换模型;在正向模型的基础上,建立了由3基色空间到多基色空间的逆向转换模型,从而将RGB相机摄取的高分辨率彩色图像转换为n基色显示系统的驱动图像。实验中,根据典型5基色LED点阵显示器的色度参数分别建立了正向和逆向转换模型,并将ColorChecker SG色卡的广色域图像作为目标图像,完成了基色转换和色差分析。Objective Wide-color-gamut display systems play an important role in the fields of electronic commerce, digital archives, design, simulation, and medical systems. In contrast to conventional three-primary display systems whose color gamut is limited to a triangle area, multi-primary display systems are more appropriate for wide-color-gamut display thanks to their larger polygonal color gamut. Nowadays, various multi-primary display systems have been put forward, such as four-primary, five-primary, and six-primary display systems. The theoretical studies of multi-primary display mainly focus on the conversion models between the multi-primary space and the standard CIE XYZ color space. However, the acquisition or production of driven images remains difficult for multi-primary display. It is a challenge for a conventional camera to capture color images which match multi-primary display with a wide color gamut. Besides, the driven images of multi-primary display have more than three channels, and thus they cannot be produced directly from three-primary images due to metamerism. In this paper, we introduce multi-primary LED dot matrix display, which has the advantages of a large size, a wide color gamut, high brightness, and a large dynamic range. To drive multi-primary LED dot matrix display with correct color reproduction, we propose a method to produce driven images for multi-primary display systems by using a conventional RGB camera. We hope that our method can be helpful for wide-color-gamut multi-primary display.Methods We measured the spectral sensitivity of four typical digital cameras, including Canon 1000D, Fuji X-E3, Nikon J1, and Sony F828, and analyzed their color acquisition ability. In light of the colorimetry theory and with numerical methods, we built a forward model which can convert the n-primary space of a display system to the standard CIE XYZ color space and then built an inverse model for the conversion from three-primary space to n-primary space by using a lookup table from three-dimensional sp

关 键 词：视觉光学 多基色显示 广色域显示 LED显示器 多光谱成像 

分 类 号：O432.3[机械工程—光学工程]