3(D) without glasses? Meet Autoestereoscópica technology

9 September 2010 | In Tips | 181,9 thousand views | By

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programacao 3dYou, with all certainty, hear the whole time Technology 3(D). On your TV, on the radio, on the internet, in theaters, i.e., everywhere. You may already have tried to close this technology, but still might not know of his origins, its functioning (technical explanation), let alone what is to come. Normally, 3D featured in TVs and Cinemas that require two-color glasses. But be aware that this “equipment” is with the days counted. The technology promises to take three-dimensional images without the need for filters in the eyes.

First of all, We explain the concept of the third dimension in graphics signals. Basically, 3D images two-dimensional images are prepared in order to give the illusion of having three dimensions. Any graphical representation of an object is presented with two dimensions – 2(D) (height and width), but with the aid of special glasses that convey a different image to each eye, so changing the angle of each one of them and causing the brain to create the illusion of depth, or with the aid of computer graphics and other features, You can make the picture give the impression to present, also, depth, What gives greater similarity to the object represented.

Imagine you with a common camera, But apart from two photos of the same object, being that the second photo you move a few inches to the side (whether it is left or right). It's more or less what makes 3D. The first picture would be sent to the left eye, for example, and the second picture would be sent to the right eye, where each eye sees its proper image. But both the pictures would be sent "at the same time" for us (at least that's what seems to be done with the naked eye when we look) and our brain then plays the following: We're seeing only one image, but with depth effect.

foto3d oculosWhat the glasses 3(D) do, for sure, is: each color serves to filter the images scrambled and strange that appear on the screen. Movies are made with two layers of color, one red and one needing to be varied between the Green and blue. Basically, each eye sees each color, making our brain be “cheaters” and leading him to interpret both images as a single. The problem is that, how images are displayed in two predominant colors, the final color of the film would be slightly impaired, In addition to, course, the discomfort of getting glasses using that at any moment.

Conventional stereoscopic 3D technology

THE 3D Stereoscopic current, digital, different from the former, analog. It sure was a huge advance in the area (and also on the costs). There are two types of 3D digital:

  • The one used in theaters today (because it is cheaper), who uses Polarized Sunglasses that filter the image view. The image on the screen is still shown squiggly, and each lens of the glasses filters the image displayed for each eye, just getting different light waves.
  • The one used in 3D TVs today. Also need glasses, but these glasses are equipped with visors LCD in lieu of lenses. In each lens (display) is shown an image, for each eye, thus giving the impression of depth. But the TV must have a high refresh rate (the so-called frames per second, or even Hertz).

To give you an idea, the human eye sees only 30 frames per second. The standard TVs have a rate of 60Hz, i.e., 60 frames per second. This gives us a sense of image much more fluid, sharp. If we are to have the same feeling, but in 3(D), the TV must have a refresh rate of 120 frames per second (120Hz). I.e., 60 frames per second for each eye. Why your TV may not reproduce images in 3D digital.

imagem 3dThe same applies for 3D displays computers. These TVs with LCD glasses have defended by Sony technology, that has worked for years in the current 3D technology and sold the new lines of 3D Sony Bravia TVs. For you have an idea, a 3D Sony Bravia 52 "here in Brazil will be sold for an average of $ 12.999. The TV has wireless internet access, presence sensor (shuts down when there are no viewers) and various other functions. Accompanies, also, a Blu-ray 3D player and two movies this media.

Along with these TVs 3Ds (not necessarily from Sony) You can use the PlayStation 3 with the latest firmware update, that gives us the option to play some games in 3D. It is worth remembering that not all game is compatible with 3D, but Sony has worked hard for the upcoming titles are compatible with technology. Among the titles, are LittleBigPlanet 2, GranTurismo 5 and Killzone 3.

The problem is that the display of a 3D title dramatically the game's performance. Remember the phenomenal graphics the Killzone 2? Now imagine these improved graphics, but in 3D. It is logical that requires more console performance. Today's games are rotated to 60 frames por segundo, and for 3D display would need to rotate tframes per secondsegundo. Very much, not?

Not only in the world of videogames, But even for the lovers of 3D already equate their computer with this thought, should not return the Scorpion to Pocket, because believe me: the setting must be at least excellent to run a game at your maximum potential. Speaking a little from my own experience: I have a XFX GeForce GTS 250 1 GB, and has games with nVidia Stereoscopic 3D technology run perfectly fine at high resolutions. However, There are games that run with a FPS (frames per second) very low, What makes gameplay extremely impractical. Therefore, If you haven't used your micro and has his eye on the news, stay tuned and always look for the best possible hardware configuration. Will need.

Inside 3D Autoestereoscópica technology

We have a lot of 3D Stereoscopic technology conventional. Now, Let's talk more about the Autostereoscopic 3D. This is the technology that Nintendo is betting on its new portable console, the Nintendo 3DS, officially announced at E3 a few weeks ago. The technology completely eliminates the use of special glasses. The company pioneered in these screens is the Sharp. Who was years ago in Globaltech, in Porto Alegre, should remember some of these screens by the feira, simple 3-d viewing pictures. Enhanced technology, It is time to apply it to the world of games.

imagem renderizada 3dThe screen used specifically in the 3DS was not revealed by Nintendo, you want to keep the secrets of the laptop to seven keys at the time of its release. But from what we can notice a large number of people who saw the claim that it is portable technology patented by Sharp, that is called Parallax Barrier. It is as if there were multiple screen of the device "buraquinhos", and the light that leave behind these holes were directed to a specific eye, thus giving the effect of depth in the pictures shown.

There are also those who say that the technology is not perfect, It depends on the person if you position one way in particular to be able to "feel" the 3-d effect. But there is something that can help it: a camera can capture the movement of the eyes and configure 3D effect according to the person's eyes (This is called Eye Tracking). Maybe this can be used for 3DS, taking into consideration that there is a front camera.

If the future of the games is in 3D, This future is a little far. Nothing is perfect yet. Best available technology, without a doubt, is the Sony. The effect generated in these glasses is far more loyal and doesn't seem to cause many problems. But it is extremely impractical to be hours and hours with that “four eyes”. Even worse for people who wear eyeglasses. And imagine if you play those games multiplayer with your friends? You must then buy an expensive glasses for each?

The ideal, for a future really in third dimension, is that be merged both technologies. The fidelity and quality of 3D with glasses in all practicality and viability of 3D without glasses. Another very important factor is the performance. I explained above why demand more from the console or computer, because the refresh rate double. Therefore, is there a great tip for developers: create the games in third dimension but, In addition to quality, love it by performance. No one deserves to pay the eye of guy in a video card (as I, for example) and see a game as beautiful seems to be being played on a computer less.


tv 3d las vegasEverything in technology is a great experiment. With 3D is no different. Trends are released at all times. Manufacturers surpassing manufacturers, producing products based on technologies already developed, tweaking them and creating a universe of new possibilities.

It is too early to say if the 3D Autoestereoscópico It will be a successful technology and present in all homes. As everything is new, will require a larger investment.

As for manufacturers, they're exercising their due obligations. But what about us, consumers, how we were? We're sitting waiting for the news? Yes, but that's not all. You can, also, opine about. Below this there is a form. Send your feedback and, for sure, some manufacturer will be seeing and, who knows, your idea inspires new trends. Join!

In Ivaiporã-PR, Computer engineer, Workgroup Administrator Tips in General. Passionate about technology and Informatics.

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