The evolution of video technology: current popular techniques

Past
　　In ancient times, humans can only use paintings to visually record pictures, consume a long time, and also be influenced by the level, preference and inclination of the painters. With the invention of the camera, human society has entered the image age. But people are not satisfied, they also want the picture "move" up, until 1880 French physiologist Malai invented the first video camera, human finally realized with time span record picture of dream.
"Visual residue" is the fundamental principle of video production, discovered by the famous Belgian physicist Joseph Prado. Experimental results show that the duration of image retention is usually 0.1-0.04 seconds. Continuous screen playback at the same speed has become the fundamental condition of video production. And the speed of playback according to "visual Residue" theory, 1 seconds screen number in between 10-25, and the film is the use of 24.

Right now

current mainstream video production commonly used methods :
1. Hand-Painted: The earliest Disney animation is the animation Division 24 pictures per second, a total of nearly 100,000 pictures connected to form about 1 hours of animation, this workload is very amazing.
2. Freeze-Stop animation: is to apply a very wide range of physical materials, using a camera to take a picture, linked to the formation of animation.
3. With the development of computer technology, three-dimensional animation is booming.
4. Shooting, such as film, advertising, promotional film production.

Film filming and post-production of the common methods:

How is the bullet time done? The film is 24 lattice per second, such as bullet time to shoot 2 seconds, that will need 48 of the same camera into motion trajectory, and then use the timing device control 48 machines at intervals of 0.04 seconds to shoot.

We often see behind-the-scenes footage of these films, actors performing in front of some white little green cloth, fantasizing about the non-existent script. Like the Magic wand in Photoshop, when the background color and the main color distinguish between the time, you can directly select the background to make changes. Shoot good material through the later software to remove the green cloth, and then synthesize some needed background. White dots are mainly used to track camera movement, three not parallel points can form a plane, so you can accurately reverse tracking the camera's motion.

Domestic blue green cloth are used, but only green cloth abroad, the reason is that some of the eyes of foreigners are blue will be removed. Setting up the scene, arranging the actors and so on to spend a lot of time and energy, if not again, and again, this cost to spend a lot of, and the use of the way to pull, in the later is very convenient to modify, greatly saving the upfront production of funds.

After the movie was produced, the video gradually moved towards the audience family, which produced the television industry. In each country after the television signal generation, the television station and the television set together implements one kind of processing video and the audio signal the technical standard is called the format. It was first developed in 1952 by the United States NTSC system, abbreviation n system. A new television format, SECAM, was introduced in France in 1956. 1962, the former Germany presented a pal system. After the founding of New China, because of the political factors at that time, China did not want to go to the United States (NTSC) of the capitalist route, and do not want to be like the Soviet Union (SECAM), so the use of the PAL system. The present world exists in these three formats.

This map of the United States, Japan is the n system, China, the United Kingdom are the PAL system, Hong Kong is a former British colony, Natural is also a pal system, after the reunification in this area is also convenient a lot, otherwise it will cost a lot of manpower and resources to replace equipment, which is also the main reason of the system is not unified We buy electronic products, are generally the United States version, Japanese version or Hong Kong version, so the most contact is N and p. N System uses 30 frames/sec, which is approximately equal to the number, exactly 29.97 frames/sec, and the PAL system uses 25 frames/sec.

The resolution is the first SD (720*576), currently under 720P are collectively known as SD. Generally include: 720*576, 720*405, 1024*720, 1024*576 ...

Full HD is the whole HD (1920*1080), is the current basic direction of new TV. Generally include: 720P small HD (1280*720), 1440*810 ...

The proportion of TV picture is 4:3, because the pupil aspect ratio of human eyes is nearly 4:3, which satisfies the visual demand. 16:9 is slightly beyond the human visual range, resulting in visual stimulation, is the current development of the general direction, slowly will replace 4:3. Film proportions are generally based on the needs of the film, before the 16:9, but gradually appeared nearly 2:1, or even 3:1 of the size.

Future
With "Avatar" release, 3D film began to fire up, in fact, there has been a lot of 3D film and television works, which is more to show this new technology mainly, has not been applied to professional film and television industry because 3D still have a lot of problems unresolved.

3D schematic diagram and 3D glasses

1. Some nearsighted people have to buy contact lenses in order to watch 3D movies. The problem has now been resolved, and Nintendo's next-generation handheld 3DS is on the market next year, and the naked-eye 3D can already be resolved.

2. Resolution limit difficult to achieve high-definition, Sony is also developing 3D video games, but the current game can not achieve high-definition, this belief with the progress of technology should be able to solve.

3. The scarcity of resources, the current chaotic market is flooded with a large number of 3D TV, but we have access to the number of 3D films? What are some of the 3D movies we've come into contact with that are really 3D? So far only: "Avatar" and "Dragon Tamer" and so on. "Taming the Dragon Master" and some 3D cartoons, the basic production is finished later, "Avatar" is a lot more difficult. And what are the fake 3D? "The Battle of the Gods" and "Alice in Wonderland" are.

What is the difference between true and false:

True 3D film from the camera is the use of professional cameras, so that viewers feel more realistic 3D effect, and false 3D use of later technology, the original plane of the picture into a perspective, the overall appearance of the 3D sense of space but carefully look at the picture is still flaky.

Professional 3D Camera:

The following is a photo of colleagues, through the process of processing, thank three colleagues ^ ^

Here, using AE's built-in plug-in 3D glasses, (Other software copy 2 layer, a layer remove red channel, a layer to remove the blue channel, and then the dislocation mix can also get 3D effect) adjustment parameters: You can get a 3D photo above, interested children's shoes may wish to try it with their own photos ~

Ring screen is currently used in many technologies, mainly to give people a sense of immersive, in the World Expo is full of use of the Ring screen Technology exhibition hall. Pre-use equipment is the six to Jiutai camera set up in the professional shooting equipment at the same time shooting. Later, after a complex production process eventually formed a ring of film, the venue required six projectors to project the film on the ring screen, using surround stereo effect is very shocking.

Interactive technology is mainly used in 4D film and gaming fields, in the past, the entire system of sci-fi movies has now been realized, and some 4D cinemas, in addition to the traditional 3D visual shock, also according to the plot of the film carefully designed smoke, rain, photoelectric, bubble, smell, scenery, character performance and so on. Compared with the traditional 3D movies, viewers can feel the sense of touch, smell and so on in addition to sight and hearing in the view of the 4D film. At present 4 D film source is more scarce, the audience selection range is limited, also did not discover the official commercial 4D movie.

Nintendo was the first to develop an interactive gaming machine, the Wii, and was the first to start developing 3D gaming consoles. But because of the resolution problem, many players also want to feel more shock, so that the development of Nintendo is limited. While Sony PS3 and Microsoft XBOX360 are high-definition game consoles, Sony basically copied the Wii's body-sensing technology, but also in the development of 3D games; Microsoft's newly listed body sense device, Kinect, is also high-end, and does not require any control devices to control the game completely with the body.

Before long, the Kinect cracked the video, and the man didn't have to wear any equipment and use two hands to control three-dimensional map rotation positioning and writing on PC system

At present, some hackers are using it to develop the interactive control of widows platform, perhaps not long we can realize finger gestures, you can login QQ chat with friends, completely with our computer operating system to communicate the life of the ~