What is 3D; How to set up 3D

3d is the abbreviation of 3 d, which means 3 d graphics. Displaying 3d graphics in a computer means displaying 3D graphics in a plane. Different from the real world, the real three-dimensional space has a real distance space. The computer just looks like the real world, so the 3d graphics displayed on the computer are just like the real world. One of the characteristics of the human eye is that when the distance is combined, it will form a three-dimensional sense. The computer screen is flat and two-dimensional. The reason why we can enjoy the real three-dimensional image is that the difference in color and gray level when displaying on the computer screen makes the human eye have a visual illusion and perceive the two-dimensional computer screen as a three-dimensional image. Based on the knowledge of chromatics, the protruding part of the edge of a three-dimensional object generally presents a high-brightness color, while the concave part presents a dark color because it is blocked by light. This understanding is widely used to draw buttons and 3d lines in web pages or other applications. For example, the 3d text to be drawn, that is, the high-brightness color is displayed in the original position, and the outline is outlined in the lower left or upper right position with low-brightness color, which will visually produce the effect of 3d text. In the concrete implementation, two 2d characters with different colors can be drawn in different positions with exactly the same font. As long as the coordinates of two characters are appropriate, 3d characters with different effects can be made visually.

What is 3D technology?

Simply put, it is virtual three-dimensional technology. It is a technology that uses computer operation to realize three-dimensional effects in vision and hearing. From the imaging point of view, three-dimensional is no longer a plane, but a three-dimensional one.

The so-called "pseudo-3D" is done by multi-faceted mapping. What is made directly by 3D technology is that 3D images are non-entities.

3d technology has a wide range of applications. No matter from the military, education, production, entertainment, scientific research, or medicine, aviation, academia and many other fields will involve 3d technology.

What is a 3D movie?

We know that people use two eyes to observe the external scenery with three-dimensional space around them in daily life.

3D movie is a kind of movie which uses binocular stereo vision principle to make the audience get three-dimensional spatial visual images from the screen. It is different from ordinary movies, which only have a sense of plane when showing.

There are many forms of making 3D movies, among which polarized glasses method is widely used. It uses human eyes to observe the scenery, uses two parallel movie cameras to represent people's left and right eyes respectively, and shoots two movie pictures with tiny horizontal parallax at the same time. During screening, two films are respectively loaded into the left and right film projectors, and two polarizers with polarization axes of 90 degrees are respectively installed in front of the projection lens. The two projectors need to run synchronously and project the picture onto the metal screen at the same time to form a double image of the left image and the right image. When the audience wears special polarized glasses, the polarization axes of the left and right polarizers are perpendicular to each other and consistent with those in front of the projection lens; The viewer's left eye can only see the left image, and the right eye can only see the right image. The left and right images are superimposed on the retina through binocular convergence function, and the brain nerve produces stereoscopic vision effect. Presenting a continuous three-dimensional picture, let the audience feel that the scenery is coming, or enter the deep recess of the picture, which can produce a strong sense of "being there".