Apr 05, 2018 if you liked this video, computer input devices ppt, please hit the like button. Computer graphics output devices with computer graphics tutorial, line generation algorithm, 2d transformation, 3d computer graphics, types of curves. As mentioned earlier, typical input was accomplished with an alphanumeric terminal, function buttons andor dials, and the light pen or light pencil, in the case of the dac1 system. Sep 07, 2017 output device is electronic equipment connected to a computer and used to transfer data out of the computer in the form of text, images, sounds or print. Ddas are used for rasterization of lines, triangles and polygons. Computer is an advanced electronic device that takes raw data as input from the user and processes these data under the control of set of instructions called program and gives the result output and saves output for the future use. Input is any data or instructions entered into the memory of a computer. Monitor printer speaker headphone monitor a monitor is an output device. Every computer has a monitor, an audio adapter, and a gpu either onboard or discrete. Tektronix invented the direct view storage tube dvst vector graphics approach in 1965, and dominated the market for the next 15 years. Graphics hardware and computer games lecture notes not available need help getting started. Once data has been input into a computer system and processed, it is now useful information.
In computer graphics, the use of logical devices is slightly more complex. Output device display data from the memory of the computer. Input devices various hardware devices have been developed to enable the user to interact in the more natural manner. Various hardware devices have been developed to enable the user to interact in the more natural.
In c input and output are done using, printf, scanf, getchar, and putchar. The data can be in the form of text, graphics, sound, and text. The table to the right contains practice questions for this section and a range of mind maps. Computer graphics notes computer graphics graphics input. Output is the result we get through output devices.
An input device is any hardware component that allows a user to enter data and instructions into a computer. Graphics software two classifications general programming package specialpurpose application package. View notes computer graphics notes from computer s c026 at dedan kimathi university of technology. A plotter is an output device used to produce imagequality graphics in a variety of colors. Imagebased rendering and lighting lecture notes not available 20. An output device can receive data from another device and generate output with that data, but it cannot send data to another device. Student notes page 1 of 7 k aquilina input devices input is any data or instructions entered into the memory of a computer.
The computer transmits data to the drive, where it is saved and can be later accessed. 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. The design of the mouse included two opposing rollers set in the bottom of a block of wood. In a 1998 paper in the ieee annals of the history of computing, don bissell notes that the idiiom cad workstation, running the idads cad software, actually. Computer graphics is the creation of pictures with the help of a computer. Example gl graphics library system on silicon graphics equipment. Output devices provide data in myriad different forms, some of which include audio, visual, and hard copy media. Explain different types of output devices by decentchoice. It is one of the most commonly used peripheral devices in. Graphics hardware output devices are those hardware that generates computer. A visual display unit vdu or monitors are the most popular output devices used for producing softcopy output.
Monitor receives data from a computer output and displays that information as text and images for users to view. Lecture notes computer graphics electrical engineering. Monitors are very similar to televisions but usually display information at a much higher resolution. Laser printer is a type of printer that utilizes a laser beam to produce an image on a drum. An output device is any piece of computer hardware equipment which converts information into humanreadable form. Introduction, application areas of computer graphics, overview of graphics systems, videodisplay devices, rasterscan systems, random scan systems, graphics monitors and work stations and input devices.
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. Output devices are those devices which display the required result in simple words which display the final result. For example, the image shows an inkjet printer, an output device that can make a hard copy of anything shown on the monitor. Data that has been processed into a useful form, called information p. Output generated by output device classified into two types. Digitizers, plotters, lcd, plasma display, printers, etc. An output device is an electromechanical device which accepts data from a computer and translates them into a human acceptable form. Printers are output devices that convert computer data into printed characters or graphics on paper. Job interview questions on basic computer technology and internet part2. Some types of output are text, graphics, tactile, audio, and video. Here i am going to share you about list of basic input devices, output devices and both input output devices. The words get printed on the paper when the pin strikes the carbon. Graphic devices data output through graphic devices on computer systems is made possible through techniques that use video generation modules to display images.
You can view the output on the monitor or you can print it on a paper using a printer. Input devices in computer graphics in hindi youtube. Jan 05, 2017 the devices which are used to display the results or information are called output devices. Most commonly used output device in a graphics system is a video monitor. The end product of the computer graphics is a picture it may be a business graph, drawing, and engineering. A general graphics programming package provides an extensive set of graphics functions that can be used in highlevel programming languages. Below we discuss the variety of peripheral devices used for computer input and output.
The devices are usually used for display, projection, or for physical reproduction. The computer memory sends one character at a time to be printed by the printer. For example, outputs produced on paper by printer or plotter in the form of text or graphics, etc. Output deviceoutput devices return processed data that is information, back to the user. Output devices notes on data entry for nios online course. Examples include monitors, projectors, speakers, headphones and printers. An output device is a piece of computer hardware that receives data from a. In this section you will learn about the different types of output devices that are commonly in use. In computer graphics, a hardware or software implementation of a digital differential analyzer dda is used for linear interpolation of variables over an interval between start and end point. The sharpness of the image depends upon the number of pixels. Super easy short computer notes to improve computer literacy and your it skills. Input devices these get data into the computer processor this does something with the data to make it useful information output devices these show the results of processing. It is a device that must be connected to a computer which allows a user to print items on paper, such as. Computer output devices receive information from the computer, and carry data that.
A printer is also very commonly used with computers. Output devices are part of the 4 main hardware components of a computer system. An output device is any device used to send data from a computer to another device or user. Examples of io devices are cd drives, dvd drives, usb drives, hard disk drives hdds, and floppy disk drives. The devices which are used to display the results or information are called output devices. Hardcopy output refers to printed output printed on the paper or some material that can be touched and carried for being shown to others. In today life, computer graphics has now become a common element in user interfaces, t. These are input hardware which are called input devices, processing hardware which are called processing components and out hardware which are output devices. The input devices are the hardware that is used to transfer transfers input to the computer. A logical device is characterized by its highlevel interface with the user program, rather than by its physical characteristics. Nls used a new device to facilitate computer interaction the mouse.
The basic operation of a crt a beam of electrons cathode rays, emitted by an electron gun, passes through focusing and deflection systems. Since the whole device is not moved, a track ball requires less space than a mouse. Dec 29, 2016 an input devices converts the data and instructions into binary form that computer can understand. 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. Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. Projectors are often used in meetings and presentations so that everyone in the room can view the presentation. Digitizer is an input device which converts analog information into a digital form. You can hang them on walls or wear them on your wrists.
Monitor this is the most common output device connected with the computer to display the processed. They include printers, plotters and microfilmmicrofiche. Output devices return processed data that is information, back to the user. Pointing devices graphic tablet a graphics tablet or digitizer, digitizing tablet, graphics pad, drawing tablet is a computer input device that allows one to handdraw images and graphics, similar to the way one draws images with a pencil and paper. This transformation is performed by input interface. Computer graphics cathode ray tube video display device. Thus, most output devices used by humans are in these categories. Monitor and the printer are the commonly used output devices. The monitor displays the video and graphics information generated by the computer through the video card. The following is a list of the most common input devices which are nowadays found in a computer system. These are divided according to the working components of computer system.
In simple terms, input devices bring information into the computer and output devices bring information out of a computer system. If you liked this video, computer input devices ppt, please hit the like button. Although the term often refers to threedimensional computer graphics, it also encompasses twodimensional graphics and image processing. Computer is fed with a lot of data to be processed and organised. Be it in user interfaces, or data visualization, motion pictures etc, computer graphics plays an important role.
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. Unit1 basics of computer graphics darshan institute of. Inputoutput devices are required for users to communicate with the computer. Computer graphics notes pdf cg notes pdf smartzworld. This is a ball which is half inserted and by moving fingers on the ball, the pointer can be moved. The design is sent to the plotter through a graphics card, and the design is. This section contains lots of files that will help you with your revision. Current uses of flatpanel displays include calculators, video games, monitors, laptop computer, and graphics display.
What is the difference between an input and output device. In computer graphics, two or threedimensional pictures can be created that are used for research. The monitor is display screen that is used to display text. The data that has been processed into a useful form is called output. The primary output device in a graphics system is a video monitor. Crt, flat panel display, raster scan system, random scan system, input and output devices, graphics software and functions, gui. Computer graphics has become a common element in todays modern 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. It can be text, graphics, tactile, audio, and video. Output devices monitor the device which displays computer output.
Typically, the primary output device in a graphics system is a video monitor the operation of most video monitors is based on the standard cathoderay tube crt design. Monitors, commonly called as visual display unit vdu, are the main output device of a computer. It contains well written, well thought and well explained computer science and programming articles, quizzes and practicecompetitive programmingcompany interview. It forms images from tiny dots, called pixels that are arranged in a rectangular form. Example glgraphics library system on silicon graphics equipment. Designed to use vector graphics, plotters were once commonly. Basically there are three types of computer hardware. As it was rolled over a surface, the distance and the speed of the rollers inside the block could be sensed.
Input and output devices used for computer graphics. An output device is any peripheral that receives data from a computer, usually for display, projection, or physical reproduction. Download computer graphics notes pdf cg notes pdf and materials. They are locators and selectors a joystick has two potentiometers, they have been attached to a single lever. Computer graphics output devices with computer graphics tutorial, line generation algorithm, 2d transformation, 3d computer graphics, types of curves, surfaces, computer animation, animation techniques, keyframing, fractals etc. List of input devices, output devices and both input. It refers to printed output printed on the paper or some material that can be touched and carried for being shown to others. It is permanent in nature and can keep in paper files or can be looked later when a person is not using the computer. The size of a monitor is measured in inches diagonally across the screen. Other display devices included the storage tube display, such as the computer displays, inc. An electron gun at the rear of the tube produce a beam of electrons which is directed towards the.
A color monitor can display from 16 to over 1 million different colors. Refresh type output devices in computer graphics geeksforgeeks. In the past, plotters were used in applications such as computer aided design, as they were able to produce line drawings much faster and of a higher quality than contemporary conventional printers, and small desktop plotters were often used for business graphics although they retained a niche for producing. Explain different types of output devices perfect computer. There are two kinds of viewing screen used for monitors.
Computer output devices receive information from the computer, and carry data that has been processed by the computer to the user. Computer graphics notes pdf cg notes pdf free download. The monitor displays the video and graphics information generated by the computer. Definition a display device is a device for visual or tactile presentation of images including text acquired, stored, or transmitted in various forms.
Most computer data output that is meant for humans is in the form of audio or video. Nov 16, 2019 what are the output devices of my computer. Jun 01, 2017 7 most important input devices of computer, namely computer graphics in powerpoint presentation formppt. Input output devices dont only produce output, but can also be used as storage and input devices. Contents video display devices cathoderay tubes rasterscan displays randomscan displays colour crt monitors flatpanel displays input devices conclusion 3. If you have any doubt, please feel free to ask in comments section below. This differs from text mode output, for which the computer generates horizontal lines of alphanumeric symbols. Input devices were also a very important part of the systems that were evolving during this early part of cg history. Some of the output devices are visual display units vdu i.
Graphics hardware and computer games lecture notes not available. The process transforms and presents information in a visual form. These inputoutput devices are also known as peripherals since they surround the cpu and memory of a computer. The flatpanel display refers to a class of video devices that have reduced volume, weight and power requirement in comparison to the crt. Computer graphics is a subfield of computer science and is concerned with digitally synthesizing and manipulating visual content. This document is highly rated by computer science engineering cse students and has been viewed 375 times.