面向头戴式三维显示的图像质量测评方法和系统

Image quality evaluation method and system for head-mounted three-dimensional display

  • 摘要: 头戴式三维显示设备是虚拟现实、增强现实和元宇宙等领域人机交互界面的常用呈现载体,当前,面向头戴式三维显示图像质量测评的方法和系统依然较为缺乏。提出了基于人眼视觉特性的三维显示质量评价理论,设计了基于人眼视觉特性的三维显示质量测评方法和系统,实现了对头戴式三维显示深度表达能力、畸变、极限可分辨能力和视场角等参量的定量化测评。利用双目视觉原理测试深度表达能力,利用像点弯曲程度和多项式变换关系表示畸变程度,利用条纹MTF值和曲线谷峰比评价极限可分辨能力,利用小孔成像原理拟合视场角。针对两款待测试头戴式显示设备,测得的深度相对误差小于3.5 %,畸变程度小于3 %,视场角分别为77°1′44″和86°56′26″。测评结果与人眼主观感受具有高度的一致性,相关方法和系统具有较高的工程适用性,有望在头戴式三维显示质量测评与设计改进方面发挥重要的作用。

     

    Abstract: Head-mounted three-dimensional (3D) display device is a common presentation carrier of human-computer interaction interfaces in the fields of virtual reality, augmented reality and metaverse. Currently, the image quality evaluation methods and systems for head-mounted 3D display are insufficient. A 3D image quality evaluation theory based on the human visual system was proposed, and a 3D image quality evaluation method and the corresponding system were designed. Some parameters including depth reconstruction, distortion, ultimate resolution, and field angle were quantitatively evaluated. The depth reconstruction was tested based on binocular vision principle, the distortion was expressed by curvatures and polynomial transformations of specific points, the ultimate resolution was evaluated by MTF and valley-to-peak ratio of patterns, and the field angle was measured based on pinhole imaging method. In the test of two head-mounted display devices, the relative error of depth reconstruction is smaller than 3.5%, the distortion is smaller than 3%, and the field angle are 77°1′44″ and 86°56′26″, respectively. The evaluation results are highly consistent with the subjective perception of the human eyes. The proposed method and system have high engineering applicability, which are expected to play an important role in the quality assessment and design improvement of the head-mounted 3D display.

     

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