You can find four major kinds of 3D used today. Stereoscopic, Pulfrich, Chromadepth, and TV Eyes 3D. Each uses a different kind of glasses, and a different aspect of sight, to make 3D images.
Stereoscopic 3D, also known as binocular 3D, will be the kind many people think of when they think 3D. Stereoscopic 3D is established by filming a picture from two perspectives and combining the opinions into just one three dimensional picture. It's this type of 3D that is utilized by concert halls and 3DTVs. Stereoscopic 3D glasses are made so that just one direction of the image is offered to each eye, this is achieved with various colored lenses, like the red/blue (also called anaglyph) glasses, by polarized el wire glasses, such as those used in Real Deborah theaters, and by shutter glasses such as those used in certain 3D theaters and 3DTVs. The restriction with this form of 3D is the movie it self should be presented in 3D format, having another picture for every eye. This is often achieved by shooting the movie in 3D, or get digitally converting it into 3D format. The advantage is that this kind of 3D provides very three-dimensional picture, complete with 'leap out' effects.
Pulfrich 3D is just a form of pseudo-stereopsis which uses each eye to be caused by a time delay between eyes as the movie plays across the screen to view a slightly different impression. Pulfrich 3D glasses have one dark lens and one clear lens. The image seen through the lens comes in the mind a fraction later than the image from your clear lens, creating a type of stereoscopic vision. The benefit of this kind of 3D is that it may be recorded with regular cameras without needing to create a secondary image in the video itself. The disadvantage is that for the 3D influence to work -- movement inside the moments must progress within the same course constantly. Still photographs or motion in other directions do not develop a 3D effect.
ChromaDepth 3D is just a type of 3D that depends upon the different wavelengths of different colors. Red having a longer wavelength and blue faster, making blue appear farther away than red, natural farther away than lime and therefore forth. By using prisms the different colors are viewed by your brain to be at different distances, based on the visible wavelength of that color. The benefit is the fact that three-dimensional images and text can be made by just combining reverse shades. The problem is having a prism over each eye and that images should be specifically created to incorporate the appropriate color combinations.
TELEVISION Eyes 3D is a sort of 3D that uses 'degree of field,' a focusing effect developed by a camera aperture. A camera aperture, the small opening behind the lens of the camera, determines the range of length at which objects are in focus. This is seen as the consequence that one thing is likely to be in sharp focus while some in-front or behind it are confused. Changing the focus of these 'depth of field' tips through another aperture, and offsetting the angle, causes the mind to translate the modifications of sharpness and cloud as various distances, making the image look three-dimensional. The limitation of the type of 3D is the glasses have a line of small holes to look through. And the situation of the openings should be adjusted for every individual wearers eyes. The bonus that it can create 3D from standard 2D films and TVs.
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All 3D glasses, regardless of what type, have their drawbacks -- different colors of anaglyph red/blue glasses, the dark and light contacts of Pulfrich, the prisms of ChromaDepth, the holes of TELEVISION el wire glasses, or the technology and shuttering motion of shutter glasses, must all be adapted to in order to enjoy 3D films.
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