激光投影电视中图像细节层次感的恰可察觉差  

Just-Noticeable Difference of Image Contour Rendering for a Laser Projection Television

作　　者：王飞霞[1] 王俊轶 李晓华[1] 王坚[1] 刘皓天 屠彦[1] Wang Feixia;Wang Junyi;Li Xiaohua;Wang Jian;Liu Haotian;Tu Yan(Joint International Research Laboratory of Information Display and Visualization,Ministry of Education,School of Electronic Science and Engineering,Southeast University,Nanjing,Jiangsu 210096,China)

机构地区：[1]东南大学电子科学与工程学院教育部信息显示与可视化国际合作联合实验室,江苏南京210096

出　　处：《光学学报》2020年第5期216-222,共7页Acta Optica Sinica

基　　金：“十三五”国家重点研发计划(2016YFB0401201)。

摘　　要：细节层次感是影响激光投影电视整体画质的重要因素之一。通过二项迫选法和"一上二下"阶梯法的主观视觉感知实验,测量并确定了激光投影电视细节层次感的恰可察觉差(JND);分析了其影响因素,并进一步比较了激光投影电视与液晶电视两个显示平台上细节层次感的异同点。结果表明:激光投影电视细节层次感的JND受图像的纹理特征影响较大;与液晶电视的细节层次感相比,两个显示平台细节层次感失真1个JND对应的σ值相差大,相邻JND的差值比较接近。利用本文的实验结果,结合峰值亮度、暗场亮度、色饱和度等图像属性的恰可察觉差,可以进一步建立包含上述多种属性的激光投影电视主观图像质量评价模型,有助于画质的优化。Contour rendering is one of the most influential factors with respect to the image quality of a laser projection television(TV). Herein, the just-noticeable differences of contour rendering for a laser projection TV are measured and determined using the two-alternative forced-choice method and the staircase 1-up 2-down method. Further, the influential factors with respect to the just-noticeable differences(JNDs) are analyzed, and the similarities and differences of contour rendering with respect to a laser projection TV and a liquid crystal display(LCD) TV are presented. The results denote that the JNDs are considerably affected by the texture features of the image in case of a laser projection TV. The values expressed by σ of one JND differ considerably in case of a laser projection TV and an LCD TV, and the differences between the adjacent JNDs are observed to be similar in case of both the TVs. Finally, a subjective image quality evaluation model, which is helpful for optimizing the image quality, can be established for a laser projection TV based on the experimental results and JNDs with respect to the image attributes, including the white level, black level, and color saturation.

关 键 词：视觉光学 图像质量评价 恰可察觉差 主观视觉感知实验 激光投影电视 细节层次感 

分 类 号：TN949.61[电子电信—信号与信息处理]