The concept of 3D image

3D refers to three-dimensional space, and D is the first word of English dimension, which means linearity and dimension. Internationally, 3D is used to represent stereoscopic images.

Since the end of last year, 3D movies, 3D TVs, 3D computer games, and even everyone's craziest World Cup football match are all crazy about 3D. Since Pixar's movie Toy Story more than ten years ago, a new era of 3D animation has begun. When we were younger, we had brought a pair of small glasses like pieces of paper into the cinema to watch 3D movies. Why did the so-called 3D audio-visual enjoyment come back after more than ten years? Especially movies don't seem to have 3D special effects. High-end TV without 3D effect is just like Mid-Autumn Festival without barbecue. I feel that life lacks a taste-the sensory taste that makes the image more three-dimensional. We see all kinds of 3D vision, which is actually a kind of stereoscopic vision. Let's use a simple example to illustrate that when taking pictures, we like to take a picture-the portrait in front and the beautiful scenery behind, but at this time the landscape and portrait are stuck together, and there is no strong sense of distance between them.

Ok, if we divide a photo into two photos in a three-dimensional way, one portrait is closer to your eyes and the other landscape is farther away from you. Then we will tilt our body 45 degrees to the left to see this image, and the sense of distance will be clearer, and the scenery behind will feel farther; In contrast, if we look at this group of photos at a 45-degree tilt to the right, we will feel the same. Something amazing has happened! If you combine left-leaning and right-leaning images, you will have a three-dimensional sense of portrait floating in front of your eyes and scenery behind you. The stereoscopic impression we see in front of the cinema or TV is the so-called 3D imaging, so instead of watching 3D video, it is actually a stereoscopic image seen through parallax.

The concept is so, but the talented developers let the audience feel three-dimensional images through various technologies, from cross-eyed pictures when they were young, to red and blue lenses in cinemas, dark green and black polarizers, and then to the shutter mirrors of advanced 3D TVs at home. These technologies make three-dimensional images, old and new, still vivid in front of you and me.

The difference between 3D images and ordinary images

The difference between 3D images and ordinary images is that it makes use of the principle of binocular stereo vision, allowing viewers to obtain 3D images from video media, thus giving them an immersive feeling. The image seen by the audience is close to the real thing and has a strong sense of reality. In particular, the shocking pictures make people feel immersive, as if everything is around. The realism of 3D makes it more powerful than 2D images.