Output devices are used to display the result or information on the computer. Input is any data or instructions entered into the memory of a computer. Dec 29, 2016 an input devices converts the data and instructions into binary form that computer can understand. Chapter 4 input and output oakton community college. An interaction technique is a way of using a physical inputoutput device to perform a generic task in a humancomputer dialogue. In simple terms, input devices bring information into the computer and output devices bring information out of a computer system. The flatpanel display is divided into two categories. Inputoutput devices are required for users to communicate with the computer. Input devices that read printed text and graphics and transfers them to a computer in digital form data is typically input as a single image can scan photos, documents, images types of scanners flatbed portable 3d receipt and business card scanners understanding computers. Computer graphics pdf computer graphics book pdf notes starts with the topics covering introduction of computer graphics. Input devices output devices keyboard mouse joystick scanner light pen touch screen monitor lcd printer plotter ii. Digitizer is also known as tablet or graphics tablet because it converts graphics and pictorial data into binary inputs.
An input device is a piece of computer hardware equipment used to provide data and. Input and output unit 4 input output devices devices. Some commonly used input output devices are listed in table below. Computer graphics notes pdf cg notes pdf smartzworld. Output device can produce the final product of machine processing into a form usable by humans. An output device is any piece of computer hardware equipment which converts information into humanreadable form. Nov, 2018 an input device sends information to a computer system for processing, and an output device reproduces or displays the results of that processing. In computing, inputoutput refers to the communication between aninformation processing system such as a computer, and the outside world. The terms input and output are used both as verbs to describe the process of entering or displaying the data, and as nouns referring to the data itself entered into or displayed by the computer.
Inputoutput devices and interaction department of computer. Io devices before delving into the main content of this part of the book on persis. It is generally used with engineering applications, and essentially draws a given image using a series of straight lines. On a computer keyboard input device, if you type h, it sends inputs a signal to the computer. Clearly, for computer systems to be interesting, both input and output are required. A track ball comes in various shapes like a ball, a button and a square. From the computer s perspective, an interaction technique involves.
Without any input devices, a computer would only be a display device and not allow users to interact with it. Find out inside pcmags comprehensive tech and computerrelated encyclopedia. The following is a list of the most common input devices which are nowadays found in a computer system. Below we discuss the variety of peripheral devices used for computer input and output.
Input devices are used to input information to computers while output device transmit information to one or more users. The data entered through input device can be some text, some graphical image or symbol, sound etc, depending on the form of the raw data the various input devices are available. It can be text, graphics, tactile, audio, and video some of the output devices are visual display units vdu i. Output devices monitor the device which displays computer output. Feb 10, 2017 for graphical output, the routines in the computer convert the x,y position, plus the r,g,b color sequences to points on a monitor. How do you ever wonder how information gets in your computer and how comes out in a form you can use. Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. Text consists of characters letters, numbers, punctuation marks, or any other symbol requiring one byte of computer storage space that are used to create words, sentences, and paragraphs. The input devices are the hardware that is used to transfer transfers input to the computer. Download computer graphics notes pdf cg notes pdf and materials. An input devices converts the data and instructions into binary form that computer can understand. Output devices in all applications allow you to display, print, or otherwise present the results of your program to anyone, period, who is not, in fact, inside the memory core of the computer.
Inputoutput devices dont only produce output, but can also be used as storage and input devices. What are graphical input and output devices in a computer. An output device works by receiving a signal from the computer and using that signal to perform a task to display the output. Input device is a device through which data and instruction are entered into computer system. What is the purpose of output devices in computer graphics. Nov 16, 2019 an output device works by receiving a signal from the computer and using that signal to perform a task to display the output. An interaction technique is the fusion of input and output, consisting of all software and hardware elements, that provides a way for the user to accomplish a task. Here i am going to share you about list of basic input devices, output devices and both inputoutput devices. Unless a computer has graphics capability built into the motherboard, that translation takes place on the graphics card. This is to help you have a basic idea about input and output devices. One or several input devices that capture user input. Computer graphics notes pdf cg notes pdf free download.
Pdf assinment find, read and cite all the research you need on researchgate. Joysticks are often used to control video games, and usually have one or more pushbuttons whose state can also be read by the computer. Examples of io devices are cd drives, dvd drives, usb drives, hard disk drives hdds, and floppy disk drives. Apr 10, 2017 output devices in all applications allow you to display, print, or otherwise present the results of your program to anyone, period, who is not, in fact, inside the memory core of the computer. Most devices are only input devices or output devices, as they can. A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Output device display data from the memory of the computer. D student brown university, department of computer science providence, rhode island lead consultant and founder. Clearly, for computer systems to be interesting, both. Example gl graphics library system on silicon graphics equipment. Emissive displays the emissive displays are devices that convert electrical energy into light. In this case, the computer tells the graphics card what colors to paint at specific points on the monitor. Monitors graphic plotter printer 992019 designed by.
The devices which are used to input the data and the programs in the computer are known as input devices. Pdf computer input and output devices ingamule siraji. Input devices input is any data or instructions entered into the memory of a computer. They are locators and selectors a joystick has two potentiometers, they have been attached to a single lever. Current uses of flatpanel displays include calculators, video games, monitors, laptop computer, graphics display. Input and output devices used for computer graphics. A graphic tablet as digitizer is used for doing fine works of drawing and image manipulation applications. The computer transmits data to the drive, where it is saved and can be later accessed.
Input devices only allow for input of data to a computer and output devices only receive the output of data from another device. In my last post i have shared about the following job recruitment questions on basic computer technology and internetjob recruitment questions on basic computer technology and internet part1. About input and output devices some examples of input and output devices lesson 2 input and output devices input devices allow us to send information to the computer. Input devices a keyboard it is a text base input device that allows the user to input alphabets, numbers and other characters. Central processing unit carries out the basic operations or. Input devices input devices any peripheral piece of computer hardware equipment used to provide data and control signals to a computer.
Input devices there are several ways to get new information or input into a computer. Some types of output are text, graphics, tactile, audio, and video. Example glgraphics library system on silicon graphics equipment. Microphone gives sound or voice input to the computer.
Output can be text, numeric data, line, polygon, and other objects. Before a computer can process your data, you need some method to input the data into the machine. Input devices as well as output devices are a neccessity in order to. The monitor displays the video and graphics information generated by the computer. Some of the output devices are visual display units vdu i. Brown university compter graphics lab input and output devices for 3d interaction joseph j laviola jr ph. Input and output unit or input and output device io provide a way to interact with a computer.
These examples of output devices also include input output devices. Input devices pointing devices keyboard optical input devices audio input device video inpu device. Fahad khan an input device is a piece of hardware that is used to enter data into a computer. Graphics software two classifications general programming package specialpurpose application package. Since the whole device is not moved, a track ball requires less space than a mouse. Input devices o level computer science 2210 prepared by. Today we are going to discuss these devices in detail.
The design is sent to the plotter through a graphics card, and the design is formed by using a pen. The device you use will depend on what form this data takes be it text, sound, artwork, etc. Difference between input devices and output devices. Input devices it is an electromechanical device that can be used to enter data and instructions to the computer. Computer inputoutput ports and interfaces 1 terms and abbreviations. Printers and visual displays are the most common type of output. Thus, a computer must have a system to receive information from the outside world and must be able to communicate results to the external world. An input device that allows you to scan in images, posters, photographs etc. Using a computer may seem an easy task because of the tools that are attacked with the device and helps in managing the system properly. Keyboard and mouse are the most commonly used input devices. While the devices whose main function is to give instructions and data to the computer are called input devices.
It can be text, graphics, tactile, audio, and video. Output devices projector an output device that can take the display of a computer screen and project a large version of it onto a flat surface. An input device is any hardware component that allows a user to enter data and instructions into a computer. Jan 05, 2017 input devices are used to give data and instructions to the computer. List of input devices, output devices and both input. But when it comes to know about them and how they work, such devices are categorized as input and output devices.
Projectors are often used in meetings and presentations so that everyone in the room can view the presentation. Depending on whether the image resolution is fixed, it may be of vector or raster type. In computing, input output refers to the communication between aninformation processing system such as a computer, and the outside world. Application areas of computer graphics, overview of graphics systems, videodisplay devices, rasterscan systems, random scan systems, graphics monitors and work stations and input devices. The monitor displays the video and graphics information generated by the computer through the video card.
Dec 14, 2010 here i am going to share you about list of basic input devices, output devices and both inputoutput devices related to computer. For example, below is a basic list of steps of how an output device works. Devices input and output unit 4 input output devices. Input and output devices people at vt computer science. What is the difference between an input and output device. Monitor and the printer are the commonly used output devices. These input output devices are also known as peripherals since they surround the cpu and memory of a computer system. Job interview questions on basic computer technology and internet part2. Inputoutput devices alona sorin seminar in computer science 236801 typewriter 9qwerty, christopher sholes 952% q w e r t y u i o p 32% a s d f g h j k l. The computer will be of no use unless it is able to communicate with the outside world.
The digitized pad is useful in converting graphic input, such as charts, graphs, and blueprints into patterns that can be manipulated and stored by the computer. These examples of output devices also include inputoutput devices. The data can be in the form of text, graphics, sound, and text. Pdf input output storages devices in computers researchgate. Input devices data glovepolhemus a modern attempt to provide the user with more degrees of freedom common in virtual reality applications polyhemus can provide six degrees of freedom rotation and translation head mounted display although primary a display device, it can also track position and orientation like polhemus space ball. A input device that allows you to draw on a screen with greater positional accuracy, similarly to how you would on a graphics tablet. Although there is no general agreement on the exact meaning of the term interaction technique, the most popular definition is from the computer graphics literature. They can be used by the computer to create a picture of whatever the camera had been pointed at.
Find out inside pcmags comprehensive tech and computer related encyclopedia. Devices input devices keyboard mouse scanner joystick microphone digital. In my opinion, i think all the unit of computer component are important and their own role in getting a computer system unit to function. Input and output devices input and output devices joseph j. Thanks to advances in computer graphics hardware and algorithms, virtually all new desktop machines available today have sophisticated fullcolor displays with. This is a ball which is half inserted and by moving fingers on ball, pointer can be moved. With the right program and information, the computer will input graphics information mouse, digitizer, distance. This transformation is performed by input interface. The jo ystick is a vertical stick which moves the graphic cursor in a. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. Data that has been processed into a useful form, called information p. Output devices output devices display information in a way that you can you can understand.
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