Do HDR displays support LDR content?: a psychophysical evaluation
Do HDR displays support LDR content?: a psychophysical evaluation
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DOI：
10.1145/1276377.1276425
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发表时间：
2007-07-01
影响因子：
6.2
通讯作者：
Buethoff, Heinrich H.
中科院分区：
文献类型：
--
作者：
Akyuez, Ahmet Oguz;Fleming, Roland;Buethoff, Heinrich H.
高动态范围（HDR）图像的发展使我们处于自黑白电视向彩色电视过渡以来图像显示技术可能发生的最大变革的边缘。新型的拍摄和显示硬件很快将使消费者能够在自己家中享受HDR体验。然而，问题仍然存在，即如何处理本质上为低动态范围（LDR）的现有图像和影片。如此大量的传统内容是否也能在HDR显示器上有效显示呢？我们进行了一系列严格的心理物理学研究，以确定LDR图像如何在最先进的HDR显示器上最佳显示，并确定HDR成像流程中哪些阶段在感知上最为关键。我们的主要发现如下：（1）正如预期的那样，HDR显示器优于LDR显示器。（2）令人惊讶的是，为在标准显示器上显示而进行色调映射的HDR图像往往并不比包围曝光序列中最佳的单一LDR曝光效果更好。（3）最重要的是，LDR数据不一定需要复杂的处理就能产生令人信服的HDR体验。简单地将LDR图像的范围线性提升以适应HDR显示器，可以等同于甚至超过真实HDR图像的外观。因此，逆色调映射这一可能棘手的过程在很大程度上可以被规避。
The development of high dynamic range (HDR) imagery has brought us to the verge of arguably the largest change in image display technologies since the transition from black-and-white to color television. Novel capture and display hardware will soon enable consumers to enjoy the HDR experience in their own homes. The question remains, however, of what to do with existing images and movies, which are intrinsically low dynamic range (LDR). Can this enormous volume of legacy content also be displayed effectively on HDR displays? We have carried out a series of rigorous psychophysical investigations to determine how LDR images are best displayed on a state-of-the-art HDR monitor, and to identify which stages of the HDR imaging pipeline are perceptually most critical. Our main findings are: (1) As expected, HDR displays outperform LDR ones. (2) Surprisingly, HDR images that are tone-mapped for display on standard monitors are often no better than the best single LDR exposure from a bracketed sequence. (3) Most importantly of all, LDR data does not necessarily require sophisticated treatment to produce a compelling HDR experience. Simply boosting the range of an LDR image linearly to fit the HDR display can equal or even surpass the appearance of a true HDR image. Thus the potentially tricky process of inverse tone mapping can be largely circumvented.