RASTER & RANDOM SCAN DISPLAYS. Application areas of Computer Graphics, overview of graphics systems, video-display devices, raster-scan systems, random scan systems, graphics monitors and work stations and input devices of pixel used by image No. Televisions in our house are based on Raster Scan Method. *This Is Open Book Examination. or else array of dots. 3. 2D Transformations. 2. 13) Outline the key differences between a Raster Scan display and a Random scan display (4 marks) The most common form of graphics monitor employing a CRT is the raster scan display, based on television technology. It is only restricted to line drawing applications. The picture definition is stored as a set of line-drawing commands in a refresh display file or a refresh buffer in memory. Unit 1: Introduction 6 1.1 Advantage of Computer Graphics and Areas of Applications 1.2 Hardware and Software for Computer Graphics. In random scan display the electron beam is directed only to the part of the screen where the picture is to be drawn. The electron beam is swept across the screen, one row at a time, from top to bottom. c. quake. Random-scan Systems: An application program is input and stored in the system memory along with a graphics package. Random Scan V e c t o r S c a n In this technique, the electron beam is directed only to the part of the screen where the picture is to be drawn rather than scanning from left to right and top to bottom as in raster scan. In the raster scan method for transformation, a 900 rotation can be performed by? It is used for text ,logs,letterheads. Random scan Raster scan; 1: In random scan display the beam is moved,between the endpoints of the graphics primitives. 1. Display Processing Unit ( DPU) c. both (a) and (b) d. to store processor clock cycles c. Process control. Computer graphics refers to the production of images on computers for use in all areas. 1.2: - Architecture of a vector display. Electron Beam. 67. When a CRT is operated as random scan display unit the electron beam directed only to the parts of the screen where a picture is to be drawn. Random scan monitors draw a picture one line at a time and for this reason are also called as vector display. Compare the merits and demerits of raster and random scanning system? Monitor is an electronic output … आज मैं आपको computer graphics में raster scan and random scan display in hindi के बारें में बताऊंगा तथा इनके मध्य के differences को भी पढेंगे तो चलिए शुरू करते है:-. Electron Beam. 2.VIDEO DISPLAY DEVICES, RASTER SCANSYSTEMS, RANDOM SCAN SYSTEMS, GRAPHICS MONITORS AND WORKSTATIONS,INPUT DEVICES, HARD COPYDEVICES, GRAPHICS SOFTWARE . It is the most common type of graphics monitor based on television technology. The Raster scan system is a scanning technique in which the electron sweep from top to bottom and from left to right. Two basic technique for producing color display with a CRT are a. 1. Prof. Vijay M. Shekhat, CE Department | 2160703 –Computer Graphics 1. Engineering workstations also used random-scan displays to display 2D blueprints. In the 1970s, both random and raster displays were commonly used in many applications, 34 IEEE Annals of the History of Computing Published by the IEEE Computer Society 1058-6180/09/$26.00 c 2009 IEEE As the electron beam moves across each row, the beam intensity is turned on and off to create a pattern of illuminated spots. Raster Scan associates degreed, random scan square measure the mechanisms employed in displays for rendering the image or picture. Graphics commands in the program are translated by the graphics package into a display file stored in the system memory. In raster scan displays an electron beam is swept across the screen, one row at a time from top to bottom. Random Scan (Vector Scan) In this technique, the electron beam is directed only to the part of the screen where the picture is to be drawn rather than scanning from left to right and top to bottom as in raster scan. The raster scan system is a combination of some processing units. Sometimes the display processor in a random scan system is referred to as a display processing unit of a graphics controller. In random scan display electron b view the full answer Previous question Next question This display file is then accessed by the display processor to refresh the screen. Resolution : It has High Resolution because it stores picture definition as a set of line commands. More b. Answer: Option B. – Refresh rate depends upon the size of the file. Raster Scan System Random Scan System; Resolution: It has poor or less Resolution because picture definition is stored as a intensity value. Multiple choice questions on Computer Graphics topic Two Dimensional Viewing. Computer aided design. System stores and application program in the system memory along with a graphics package. Information of on and off pixels is stored in refresh buffer or Frame buffer. Question Paper Solutions of Introduction to Computer Graphics, Computer Graphics (BCAN-303), 3rd Semester, ... Differentiate between raster scan and Random Scan display. : Electron-Beam: Electron Beam is directed from top to bottom and one row at a time on screen, but electron beam is directed to whole screen. 2. 5. 2. d. None of these. In random scan display an electron beam is deflected from endpoint to end-point. a. squire and rectangle convex and concave octagon and convex hexagon and squire ⇒ Which device is used to specify scalar values? IT depends on what one wants to do Key Differences Between Raster Scan and Random Scan 1. Random-scan monitors draw a picture one line at a time and for this reason are also referred to as vector displays (or stroke-writing or calligraphic displays) A pen plotter operates in a similar way and is an example of a random-scan, hard-copy device. Raster scan display. of line used by image In a raster scan system, the electron beam is swept across the screen, one row at a time from top to bottom. 11. The electron beams are normally set at both high and low levels to help generate patterns of illuminated spots as it … A raster scan, or raster scanning, is the rectangular pattern of image capture and reconstruction in television. a. As the electron beam passes the beam intensities are turned on and off to create a pattern of illuminated spots. 2: Vector display flickers when the number of primitives in the buffer becomes too large. d. … A System which follows Random or Vector Scan displays is called Random Scan System: A System which follows Raster Scan Displays is called Raster Scan System 2. CS6504 COMPUTER GRAPHICS QUESTION BANK S.No QUESTIONS UNIT -1 2 MARK QUESTIONS Define 1. Computer Graphics pdf (computer graphics book pdf) Notes starts with the topics covering Introduction of Computer graphics. which environment has been one of the most accepted tool for computer graphics in business and graphics design studios. It is costlier than Random Scan system. Raster Scan Display: A Raster Scan Display is based on intensity control of pixels in the form of a rectangular box called Raster on the screen. The architecture of a random scan display system with display processor. 66. So Group of dots are known as Pixels, and image is sub 4. Raster Scansystems, Random Scan Systems: 1.Afixed area of the system Application areas of computer graphics, II. Graphics Hardware. A beam of electron moves through each row, its intensity is alternatively turned ___ which helps to … Random-Scan monitors cannot display realistic shades scenes. Dr.M.Gopichand Computer Graphics-UNIT I UNIT- I INTRODUCTION TO COMPUTER GRAPHICS UNIT – I Contents at a glance: I. Raster scan is suitable for realistic display and well suited for displaying shading and color areas. If we want a line connecting point A with point B on the vector graphics display, we simply drive the beam deflection circuitry, which will cause beam to go directly from Ans. A great deal of specialized hardware and software has been developed, with the displays of most devices being driven by computer graphics … Raster Scan Display • Electron Beam – Swept Across Screen –Top to Bottom –One at Time • Beam moves – Each Row – Intensity –Turned On/Off Create Pixels • Refresh/Frame Buffer: Information of picture stored – Memory Area • Pixels value retrieve – memory (buffer) – Plotted - Screen. It is less expensive than Raster Scan system. Homogeneous Coordinates and Matrix Representation of 2D Transformations. b. Macintosh. As shown in Fig., vector scan CRT display directly traces out only the desired lines on CRT i.e. Graphics package translates the graphic commands in application program into a display file stored in system memory. 1 Answer to Two basic technique for producing color display with a CRT are a. The display must be refreshed at regular intervals – minimum of 30 Hz (fps) for flicker-free display More Difference Between Vector Scan Display and Raster Scan Display Raster scan is _____ expensive than random scan . Computer graphics are fun and lively. Characteristics: i. RANDOM SCAN DISPLAYS AND RASTER SCAN DISPLAYS 2. Random Scan System. It is also termed as vector display, as it displays or draws a picture in the form of one line at a time. Let’s see the detailed explanation and what is the difference between the display techniques. In controllable interaction user can change the attributes of the ___. College Note. Today, computer graphics is a core technology in digital photography, film, video games, cell phone and computer displays, and many specialized applications. Graphics Controller: b. In random scan displays electron beam is directed only to the parts of the screen where a picture is to be drawn. A wireless mouse works on a) Infra blue radiation b) Infra Red radiation c) X-rays d) UV rays Ans: Infrared radiation 56. In raster scan displays an electron beam is swept across the screen, one row at a time from top to bottom. The display in random scan is basically a computer controlled oscilloscope. For a layman, raster scan and random scan can be described in a very simple way of using a pencil to draw something on a screen. In vector displays beam is deflected from the endpoint to endpoint and the technique is called___. In raster scan display the beam is moved all over the screen one scan line at a time from top to bottom and then back to top. Random-Scan Display Processors: Input in the form of an application program is stored in the system memory along with graphics package. Practice these MCQ questions and answers for preparation of various competitive and entrance exams. Less c. Both a & b d. None Answer: b 68. Application areas of Computer Graphics, overview of graphics systems, video-display devices, raster-scan systems, random scan systems, graphics … a. graphics. This is also called as Random Scan Display… Random scan is a method in which the display is made by the electronic beam, which is directed, only to the points or part of the screen where the picture is to be drawn.

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