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Random Scan Systems !

In Random Scan System, an electron beam is directed to only those parts of the screen where a picture is to be drawn. The picture is drawn one line at a time, so also called vector displays or stroke writing displays. After drawing the picture the system cycles back to the first line and design all the lines of the picture 30 to 60 time each second.


Advantages

  • Produced smooth line drawings
  • High resolution


Disadvantages

  • Designed only for line drawing applications.
  • Can't display relastistic images.


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MCA Cource
KU's MCA Course

Introduction

Survey of Computer Graphics Applications Interactive & Passive Graphics Introduction to GKS Primitives Display Processors

Graphic Devices

Display Systems-Refresh CRTs Raster Scan Monitors Random Scan Monitors Grey shades Interlacing Beam Penetration & Shadow Mask Monitors Look Up Tables Plasma Panel Flat-Panel Displays LED LCD VGA SVGA Hard Copy Devices Printers Plotters Interactive Input Devices Keyboard Mouse Digitizing Tablet Light Pen Touch Panels Image Scanners Voice systems Joy Stick Track Ball

Drawing Geometry

Coordinate System Resolution Homogeneous Coordinate System scan conversion DDA Symmetrical DDA Simple DDA Bresenhams Line Algorithm Circle Drawing Algorithm Polar Coordinates Bresenhams Circle Algorithm Ellipse

2-D Transformations

Transformations Translation Rotation Scaling Mirror Reflection Shearing Zooming Panning Postioning Pointing Rubber Band Methods Dragging Tweening

Graphic Operations

Clipping Points Clipping Line Clipping Sutherland-Cohen Algorithm Midpoint Sub-Division Algorithm Polygon Clipping Sutherland Hodgman Algorithm Window & Viewport Windowing Transformation Stack Based Fill Algorithm Scan-Line Seed Fill Algorithm

3-D Graphics

3D Modelling of Objects 3D display Techniques Coordinate System 3D Transformation Matrices For Translation, Scaling & Rotation Parallel Projection Perspective Projection Hidden Surface Removal Z-Buffer Back Face Scan-Line Depth-Sorting Area Subdivision Shading-Modelling Light Intensities Gouraud Shading Phong Shading

Multimedia

Hypertext or Hypermedia Multimedia Applications Authoring Hardware Components Windows paint brush

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