Multi-touch technology concept

MultiTouch technology refers to a technology that allows users to control the graphical interface through multiple fingers simultaneously. Corresponding to multi-touch technology, it is single-touch. Single-touch devices have been around for many years. Small-sized touch phones are the most common. Large-size ATMs and queuing machines in banks are the most common.

The multi-touch display device uses advanced computer vision technology to acquire and recognize the position of a human finger on the display screen, and through calculation, converts the physical coordinates of the finger on the display screen into the logical coordinates and control instructions of the computer screen. Realize the touch selection on the display screen with fingers or other natural objects, open the interface, switch the screen, query information and other control functions.

In terms of points that can be touched, there are two points of touch (more suitable for one user, and now the two points of touch are also classified as multi-touch), and true multi-point touch (suitable for multiple users). In terms of device size, there are small-size personal multi-touch devices and large-size multi-touch devices suitable for multiple people. Usually 20 inches is used as the demarcation point between personal equipment and multiplayer equipment. Obviously, too small equipment is inconvenient for many people to use.

A computer should be composed of arithmetic unit, memory, controller and input-output device. The input device of a traditional computer is a keyboard and a mouse, and the output device is a display. The difference between a multi-touch computer and a traditional computer is that its input and output are all concentrated on the display. When you input commands on the display, the computer will The result is reflected on the display. Under the existing technology, the display devices used in the multi-touch technology mainly include liquid crystal displays and rear projection displays. Devices such as holographic displays are still in the laboratory of science fiction movies and scientists.

Use of multi-touch

If you have used an iPhone, you will know that multi-touch is a very useful and fun thing: when browsing the web, you often have to zoom in on a certain area to see clearly, and it is also very useful when looking at pictures. Of course, without this function, human beings will adapt and realize their own purposes, just like the mobile phones without touch function, they still go online, of course, the simplicity and comfort are different. This is the same as eating meat and vegetables.

Many people think that multi-touch is limited to zoom in and out. In fact, zooming in and out is just one of the practical examples of multi-touch. With multi-touch technology, any application can be infinitely expanded through infinite imagination. Programmers can apply multi-touch to many aspects, to a certain extent, change or innovate more operating methods. The typical application is that playing the piano on hard glass becomes a reality. If you turn your phone screen into a piano key, it ’s fun to coax a little girl. Another typical example is the PS simulator on an Apple mobile phone, which uses multi-touch technology to realize the combined input of direction keys and other buttons at the same time.

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