Originally Posted by GlenC
Chris, you have continually fixated on your perception of the topic of this thread. You assumed that "across a scene"
was the only way to look at the issue. That is not the issue and every one in here agrees that you can easily see very high contrast ratios across a scene, given a moderate APL.
I will ask a simple question. If you look at a full white field (100 IRE, say 15fL), you contend that you can distinguish between small objects in that field having CR of 500:1, 700:1, 1000:1 and/or possibly more, is this true?
I am unclear as to what I'm supposed to be looking at. It it's a white field, I'm just looking at an all-white field. But regardless, yes we can see in a single view across a single image or scene CRs well above 1,000:1. As such, displays with simultaneous CR(such as ANSI CR) limits below this do not exceed our capabiliites and as such leave significant room for improvement. In the above, I cited the figure of 5 orders of magnitude, which is more intuitively correct and backed by several of the HDR papers cited. Poynton cites 1,000:1, but I don't feel he is the best source in this regards, which is what I've explained previously. Joel Silver at the ISF, in turn, cites Poynton's 1,000:1 figure. Even if you go with the much much lower 1000:1 figure, that is not insignificantly larger than the piddling few hundred:1 figures cited here (and by all means if you can explain where all the various versions of those figures come from, I'm all ears. It seems to me people are just making them up though because they aren't cited anywhere
, or as was certainly the case at least in one instance with 'armadillo's' 130:1 figure, drawn from a mistaken/ignorant interpretation of CSF which unfortunately seems to be a continuing pattern in these discussions...)
The only display device I am aware of that can really exceed our capabilities in these regards, as I mentioned before, is the Brightside display. It achieves an ANSI CR spec'd at 25,000:1. If you expect a regular consumer display with a few hundred to one ANSI to come close to exceeding our visual capabilities in this regard, you are seriously mistaken. However, I am still struggling to understand what exactly your position is on the matter because you continue to revert back to temporal issues such as on/off CR. Clearly you do understand that ANSI CR performance in current displays is a limitation, given your cabinet-lining services which go hand-in-hand with this understanding.
Anyway, I'm not sure why you asked me to state this yet again, as I just above stated this again, and I've been saying the same thing over and over and over since the very start of the thread. I don't know what you hope to achieve by having me rearticulate the same position a dozen different ways. Post #379 contains all this, you could just read that post if you wanted.