High Dynamic Range visualization is today’s buzzword, and when HDR is done well, with good reasons. What does it mean HDR in general and specifically for projection?
The human visual system is the reference for reproduction of video images in general and in particular for the reproduction HDR images. The purpose of an HDR technology is to reproduce images with a luminance range equal to the one perceived by the human visual system without adaptation, which is round of 5 orders of magnitude, or 16 f stops.
We can simply see that as producing images with a wider difference between the dark and the bright areas, a wider range of brightness levels, a better contrast.
Moreover, in order to reproduce the vast majority of images as seen from real, we would need a display capable of reaching high luminance peaks. How much should be such “high level” is a debated question, but many agree on a 10,000 cd/m2 level as an optimal goal.