GuyFawkes writes "It is now, just this first week in January, basically impossible to avoid some media outlet breathlessly informing me that 2010 AD is going to be the year of 3D, not only will we now be having 3D TV sets in our homes, but every piece of cinematic crap from the seventies (Star Wars) onwards is going to be re-released in 3D.
Luckily, all the major electronics manufacturers have new products, which take about a year to develop, ready to take advantage of the “smash hit” that was Avatar, which took about a year to develop. Now isn’t that a happy coincidence?
Even Sky, who have yet to broadcast any decent quality HD content (e.g. 1080p @ > 16 mbit/sec) are getting in on the bandwagon, football is going to be in 3D.
Deep Joy. Every pub, venue and lounge on the planet is now going to look like covens of the Stevie Wonder appreciation society.
(I’m not going to diss Roy Orbison, at least he had talent)
Even better, studios are claiming that the new 3D format is “pirate proof”!! (Yeah, that’ll be why I downloaded the 3d IMAX version of Avatar buddy) This fallacy is of course based on the false notion that all film piracy is due to kids sneaking camcorders into the cinema.
Even better still, all your Blu-Ray players and 1080p HD televisions are now obsolete, so you’ll have to buy new stuff.
So, what is 3D TV?
Currently, there are two ways of displaying a picture, one is interlaced, one is progressive.
A 1080p set has 1080 horizontal lines, in an interlaced picture every other line, or 540 lines, is refreshed each frame, in progressive, all 1080 lines are refreshed each frame.
A frame is each individual image on a roll of film.
Now we have seen our flat panel TVs, which started out at 50 Hz (60 Hz if your are state-side) go to 100 Hz (120 Hz) and now 200 Hz (240 Hz) and of course the default 24 Hz movie refresh, which is a bit of nonsense really because if you show a 24 Hz movie on a 240 Hz set, it just means ten successive frames on the set show each frame of the movie, then move on to the next frame.
Now it depends on whether or not you are cynical (experienced) or gullible.
It just so happens, rather like Avatar and 3D televisions both being ready for market at the same time, that all the existing HD TV technology is exactly what you need to do 3D TV, how amazing is that?
How it works is this, you take the existing panel technology, and then you put a *switchable* polarising filter in front of the screen. No aftermarket answers here, you buy a whole new set.
Then, with the existing technology which allows refresh rates which are multiples of frame rates, you start showing left channel image data for this frame with the polarising filter switched this way, then you show the right channel image for the same frame with the polarising filter switched that way.
All you need to add now is a set of gimpy Stevie Wonder glasses, with each lens containing nothing more than a polarising filter, set at 90 degrees to one another, to match the two states of the polarising filter built in to the screen, and voila!
Part of each frame can only be seen by the left eye, while the right eye sees only dark screen, and part of each frame can only be seen by the right eye, while the left eye sees only dark screen. Do this backwards and forwards fast enough and, like cine film, you get apparent smooth motion, but now in 3D.
BUT IT BLOODY WELL IS NOT THREE DEE!
The keyboard that I am typing this on IS three dee, and because the function keys are further away from my eyes than ZXCVB etc, there is depth of field and focus.
But, on a television screen, absolutely everything you see is exactly the same distance away. There is no depth of field, there is no focus.
So how the hell to they say it is 3D.
Google “moving optical illusion” and all will become clearer, or more blurred and head-achey depending on your perspective.
So it is NOT 3D, and like the so called 3D pictures shown on the Google search, a large part of the “trick” to viewing them involves training your mind to stop rejecting the twisty wrongness, and start perceiving depth or movement that simply is not there.
This is nothing less than a MASSIVE social experiment in optical /neural stimulus.
I am personally extremely dubious about the long term effects of this on the brain.
Speaking of myself personally, I have what is known as a “lazy eye” which means my brain basically ignores much of what my right eye sees. It all works, and when I was seven years old I wore a patch on my left eye for six months, which taught my brain to stop ignoring my right eye, but, within six months of removing the patch, my brain went back to ignoring it again.
For people like me then, this new 3D technology simply does not work, period, and can not be made to work.
Interestingly, only a very small percentage of the population use both eyes equally, the vast majority of the population have brains that favour one eye slightly over the other, it is a distribution curve, with people like me at one end, and those who use both eyes equally at the other, and everyone else somewhere in the middle.
But of course none of this matters, the marketing departments have already decided the future.
So, to (mis)quote Animal Farm, our dystopian Stevie Wonder fan club future worlds looks like it is going to be “Four eyes good, two eyes bad”
I wonder if it will evolve into “Four eyes good, two eyes better”"