Wang Minqi, Cooper Emily A
University of California, Berkeley, USA.
ACM Trans Graph. 2021 Apr;40(2). doi: 10.1145/3443702. Epub 2021 Apr 21.
Dichoptic tone mapping methods aim to leverage stereoscopic displays to increase visual detail and contrast in images and videos. These methods, which have been called both and , selectively emphasize contrast differently in the two eyes' views. The visual system integrates these contrast differences into a unified percept, which is theorized to contain more contrast overall than each eye's view on its own. As stereoscopic displays become increasingly common for augmented and virtual reality (AR/VR), dichoptic tone mapping is an appealing technique for imaging pipelines. We sought to examine whether a standard photographic technique, exposure bracketing, could be modified to enhance contrast similarly to dichoptic tone mapping. While assessing the efficacy of this technique with user studies, we also re-evaluated existing dichoptic tone mapping methods. Across several user studies; however, we did not find evidence that either dichoptic tone mapping or dichoptic exposures consistently increased subjective image preferences. We also did not observe improvements in subjective or objective measures of detail visibility. We did find evidence that dichoptic methods enhanced subjective 3D impressions. Here, we present these results and evaluate the potential contributions and current limitations of dichoptic methods for applications in stereoscopic displays.
双目色调映射方法旨在利用立体显示器来增加图像和视频中的视觉细节和对比度。这些方法，曾被称为 和 ，在两只眼睛的视图中选择性地以不同方式强调对比度。视觉系统将这些对比度差异整合为一个统一的感知，理论上认为该感知总体上比每只眼睛单独的视图包含更多的对比度。随着立体显示器在增强现实和虚拟现实（AR/VR）中越来越普遍，双目色调映射对于成像管道来说是一种有吸引力的技术。我们试图研究一种标准的摄影技术——曝光包围法，是否可以进行修改，以类似于双目色调映射的方式增强对比度。在通过用户研究评估该技术的效果时，我们还重新评估了现有的双目色调映射方法。然而，在多项用户研究中，我们没有发现证据表明双目色调映射或双目曝光能持续提高主观图像偏好。我们也没有观察到在细节可见性的主观或客观测量方面有改善。我们确实发现有证据表明双目方法增强了主观3D印象。在此，我们展示这些结果，并评估双目方法在立体显示器应用中的潜在贡献和当前局限性。
