在虚拟现实头戴式耳机中使用同心环形图案的径向可变对比度测量

IF 1.7 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of the Society for Information Display Pub Date : 2023-05-02 DOI:10.1002/jsid.1208
Chumin Zhao, Ryan Beams, Aldo Badano
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引用次数: 0

摘要

虚拟现实(VR)头戴式显示器(HMD)上的图像质量在每个目镜上从视觉中心(HMD的光轴)向外围呈放射状变化。虚拟图像在显示视场(FOV)的外围模糊不清,导致对比度和分辨率下降。平板显示器评估采用的传统测量方法没有考虑额外光学元件(如HMD镜头)产生的空间依赖性图像伪影,因此可能不足以评估VR图像质量。我们开发了一种新的方法,使用圆形同心环图案来测量多个VR头显上径向变化的迈克尔逊对比度。结果表明,在高空间频率下,测量到的图像对比度向显示视场外围降低。此外,VR头戴式显示器上的图像质量可能会受到眼睛(或相机)在眼盒内的3D位置的影响。具体来说,如果HMD的瞳孔间距(IPD)设置与用户的设置不匹配,对比度会进一步降低。它也随测光装置的入口瞳孔位置而变化。我们提出了一种有效的图像质量评估方法,可以方便VR头显的监管评估。
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Radially variant contrast measurement in virtual reality headsets using circular concentric ring patterns

Image quality on virtual reality (VR) head-mounted displays (HMDs) is radially variant on each eyepiece from the visual center (optical axis of the HMD) towards the periphery. The virtual image is blurred at the periphery of display field of view (FOV) resulting in contrast and resolution degradation. Conventional measurement methods adopted from flat-panel display evaluation do not consider the spatially dependent image artifacts by additional optical components such as HMD lenses and thus may not be adequate to assess the VR image quality. We develop a new method using circular concentric ring patterns to measure the radially variant Michelson contrast on multiple VR HMDs. The results show that measured image contrast reduces towards the periphery of display FOV especially at high-spatial frequencies. In addition, image quality on VR HMDs can be affected by the 3D position of the eye (or the camera) within the eyebox. Specifically, contrast is further degraded if the interpupillary distance (IPD) setting of the HMD does not match that of the user. It also varies with the entrance pupil location of the light-measuring device. We propose an efficient method for image quality evaluation that can facilitate the regulatory evaluation of VR headsets.

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来源期刊
Journal of the Society for Information Display
Journal of the Society for Information Display 工程技术-材料科学:综合
CiteScore
4.80
自引率
8.70%
发文量
98
审稿时长
3 months
期刊介绍: The Journal of the Society for Information Display publishes original works dealing with the theory and practice of information display. Coverage includes materials, devices and systems; the underlying chemistry, physics, physiology and psychology; measurement techniques, manufacturing technologies; and all aspects of the interaction between equipment and its users. Review articles are also published in all of these areas. Occasional special issues or sections consist of collections of papers on specific topical areas or collections of full length papers based in part on oral or poster presentations given at SID sponsored conferences.
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