What is 3D?
In short, 3D technology uses two overlapping images to increase viewers' depth perception. One image acts on the right eye, and the other image acts on the left eye. The program is filmed with a special camera, which has two separate lenses, much like your glasses, in two ways with some other images. This creates a sense of depth that extends the image from the surface of the screen to the rear, sometimes as if from the screen toward the viewer.
There are several specific implementations of competing 3D technologies, but they are all designed to achieve the same goal: to display different images for both eyes. Different techniques, by using different types of glasses, selectively display different parts of the picture to your left eye and right eye for the same purpose. The difference between these methods lies in the way these two images are produced and how glasses are used to distinguish between the two images.
Stereoscopic photograph
"Stereoscopic photographs" is an imaginative term used to describe the basic forms of most practical 3D projections. The images of the left eye and the right eye are superimposed (usually recorded on the same film), while color differences are used to distinguish between the two. The viewer wearing a pair of tainted glasses (traditionally red and blue green), makes the eyes can distinguish two images superimposed.
The end result is depth. Stereoscopic photographs are mainly used for the release of family versions of films - even if the film does not use stereoscopic photographs in the cinema - because it is cheap and easy to use. Until now, if you see a DVD or Blu ray Disc labeled "3D", it still uses stereoscopic photos.
Advantages of stereoscopic photo 3D
Easy access. Stereoscopic photography is used in today's 3D, DVD, and Blu ray discs because it does not require special equipment. You don't need a 3D-ready projector or a TV set. It can work on your existing TV or projector, regardless of the display technology based on the TV or projector. How much is the frame rate, aspect ratio and resolution?. If you can watch movies, you can watch 3D movies in stereoscopic photos.
Cheap. The 3D, DVD, and Blu ray discs of stereoscopic photos will not cost more than the corresponding 2D version plus 4 inexpensive cardboard frames. Given that consumers do not have the extra cost of 3D glasses, video display devices, or DVD players, it is the cheapest 3D system on the market today.
Passive technology. We'll talk more about it in a minute, and the stereo 3D uses passive glasses. Passive glasses have no circuit or electronic component, which makes them cheap, easy to use and light in weight. For a small friend or a large audience is very ideal, not because of eye damage or "hooking" due to heavy losses on the economy.
The disadvantage of stereoscopic photo 3D
Colour. One of the biggest problems with stereoscopic photography, 3D, and the overall negative impression of 3D is the poor color. When one lens dyes everything red, and the other lens dyes everything blue and green, the color looks a little unusual. Lately, post processing has been able to adjust colors to make it look more natural, but everything still has a sense of shine, and colors are not as solid and reliable as normal 2D.
Brightness loss. A filter is defined as removing superfluous or unwanted items. A stereoscopic 3D system can work because only a particular wavelength of light reaches the viewer's eyes, and all other wavelengths of light do not meet the requirements. As a result, the images of 3D glasses are much more dim compared to the 2D version.
String. In part because of the design of the glasses and, in part, due to the use of color filtering, the stereo photograph 3D is more prone to "string" than in other types of techniques". The line occurs in one eye and sees a part of the image used for the other. This situation can be distracting and very obvious when it happens, and it can destroy viewers' devotion to the film.
Eyestrain. 3D also tends to lead to more eye strain than other techniques. Part of the reason is the use of red and blue-green filters that change the wavelength of light entering the eye. Cheap glasses do not have the ability to correct this. As a result, the focus of one eye does not match the focal length of the other, which can make the eye's focus difficult. Coupled with the 3D video that has made eye strain, stereo 3D can cause eye fatigue for some people - including headaches.
