1, the mouse is a hand-held screen coordinate positioning device, and it is an input device adapted to menu operating software and graphics processing environment, especially in the popular Windows graphics operating system environment. There are two kinds of commonly used mice, one is mechanical and the other is photoelectric.
2. Camera (or webcam), also known as computer camera, computer eye and electronic eye, is a video input device, which is widely used in video conferencing, telemedicine, real-time monitoring and other fields.
3. Scanner is a device that uses photoelectric technology and digital processing technology to convert graphic or image information into digital signals through scanning.
4. Light pen, also known as photoelectric pen, is a device that uses light and photovoltaic cells to read special forms of data such as bar code records into the computer system. Its shape is similar to that of a pen, so it is called a light pen.
5. Voice input and output devices refer to human-computer interface devices that directly input or output human voice information to computers. People mostly transmit information through voice in daily life, so voice input and output equipment is an important development direction of man-machine interface equipment.
Extended data
An input device is a human or external device that interacts with a computer and is used to input raw data and programs for processing these numbers into the computer. Computers can receive all kinds of data, including digital data and non-digital data, such as graphics, images and sounds. These data can be input into computers through different types of input devices for storage, processing and output.
Computer input devices can be divided into the following categories according to their functions:
Character input device: keyboard;
Optical reading equipment: optical mark reader, optical character reader;
Graphical input devices: mouse, joystick, light pen;
Image input equipment: camera, scanner, fax machine;
Analog input equipment: language analog-to-digital conversion recognition system.
It is both an input device and an output device: the storage device has an internal memory and an external memory; Floppy disk, hard disk, CD-ROM, U disk and mobile hard disk are all external memories; Internal memory is divided into RAM and ROM. RAM is random access memory. ROM is read-only memory; Memory stick is RAM and ROM refers to the chip on the motherboard that stores BIOS.
When you enter information, you should explain the specific content, form and time of the information. According to the relationship between the source of information (called the target system) and the processing system, information input can be divided into indirect connection, semi-direct connection and direct connection. Indirect connection records the information of the target system on the data carrier, and then inputs it into the processing system through the input device. Commonly used carriers are punched cards, punched paper tapes, magnetic tapes, magnetic disks, etc.
Semi-direct connection connects the target system and the processing system by using the original file that the processing system can process. Commonly used original files include mark files, magnetic ink character files, printed optical character files and handwritten optical character files. Direct connection directly inputs information into the processing system through keyboards, light pens, recording devices, sensors, etc. According to the control difference between acquisition system and processing system, information input can be divided into offline input and online input.
When input offline, the information acquisition system and the processing system are connected through an auxiliary data carrier. Online input, the information acquisition system directly inputs the information into the processing system. Information input can also be divided into non-intelligent input and intelligent input according to the intelligence degree of input equipment. The non-intelligent input information is data, and the input device only converts the data into code input that can be recognized by the processing system. Intelligent input can not only convert data, but also perform operations or directly input information such as sound, images and text marks. Common input methods include punched card, punched paper tape, magnetic tape, disk and character reading.
References:
Baidu encyclopedia input device