![]() Our own knowledge of the world also helps us perceive depth. This is the perception of depth using parallax - the observed displacement of an object caused by the change in the observer's point of view For example, when driving in a car, it appears as though nearby features move rapidly and far away features move slowly. However, that's not the only way to perceive depth. In both 3D movies and VR headsets, binocular vision can help us perceive depth. Modern-day VR headsets, such as the Meta Quest Pro, use two different displays to project three-dimensional computer-generated images to deliver a highly immersive environment that our brain perceives as real. However, in virtual reality, using modern-day headsets, this problem does not occur. ![]() In both cases, for individuals who cannot use one eye, the intended projection does not happen, and the experience is soured. ![]() Again, the brain processes the images as two perspectives of the same thing - giving a 3D view. In this case, a filter in front of the projector changes the polarization of each image to match the filter on either the right or left lens of the glasses. Many modern 3D movies, however, use polarization. The brain processes the images as two perspectives of the same object, creating the illusion of a 3D image. The glasses then filtered the images so that each eye see only one image. Another system uses a rig with two separate cameras for all shots. The old-style 3D movies that used red and blue glasses tinted one set of images red and the other blue. One type uses a fusion camera system which is designed to capture two sets of images at once. There are different types of 3D movie technologies.
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