BCA 4th Sem Notes-Raster-Scan Displays

• UNIT-I 

~The Advantages of Interactive Graphics
~Representative Uses of Computer Graphics 
~Classification of Application Development of Hardware and software for computer Graphics
~Overview, Scan:
~Converting Lines
~Scan Converting Circles
~Scan Converting Ellipses

UNIT-II 

~Hardcopy Technologies
~Display Technologies
~Raster-Scan Display System
~Video Controller
~Random-Scan Display processor
~Input Devices for Operator Interaction
~Image Scanners
~Working exposure on graphics tools like Dream Weaver, 3D Effects etc
~Clipping
~Southland- Cohen Algorithm
~Cyrus-Beck Algorithm
~Midpoint Subdivision Algorithm

UNIT-III 

~Geometrical Transformation
~2D Transformation
~Homogeneous Coordinates and Matrix Representation of 2DTransformations 
~composition of 2D Transformations
~The Window-to-Viewport
Transformations

Introduction to 3D Transformations Matrix

UNIT-IV 

Representing Curves & Surfaces----

Polygon meshes parametric

Cubic Curves

Quadric Surface

Solid Modeling   Representing Solids

Regularized Boolean Set Operation primitive Instancing Sweep   Representation
Boundary Representations
Spatial Partitioning Representations
Constructive Solid Geometry Comparison of Representations

UNIT-V                           

~Multimedia Definition
~CD-ROM and the multimedia highway
~Computer Animation
(Design, types of animation, using different functions)

UNIT-VI  

~Uses of Multimedia
~Introduction to making multimedia –
~The stage of Project
~hardware & software requirements to make good multimedia skills
~Training opportunities in Multimedia Motivation for Multimedia usage

Raster-Scan Display System

Raster Scan Displays are the most normal kind of illustrations screen which utilizes CRT. It depends on TV innovation. In raster filter framework electron pillar clears over the screen, through and through covering one line at a time.An example of an enlightened example of spots is made by turning shaft force on and off as it moves over each line. A memory territory called revive cushion or casing cradle stores picture definition. This memory territory holds force esteems for all screen focuses. Put away power esteems are reestablished from outline cushion and painted on-screen taking one line at a time. Each screen point is alluded to as pixels. 

In raster filter frameworks reviving is done at a pace of 60-80 edges for each second. Invigorate rates are additionally some of the time depicted in units of cycles every second/Hertz (Hz). Toward the finish of each output line, electron shaft starts to show the next sweep line subsequent to coming back to the left half of the screen. The arrival to one side of the screen after the revive of each sweep line is known as even following of electron bar. Toward the finish of each edge, the electron pillar comes back to the upper left corner and starts the following edge. 

Raster-Scan Display Processor: 

A significant capacity of the show process is to digitize an image definition given in an application program into a lot of pixel-power esteems for capacity in reviving cradle. This procedure is alluded to as output change. The motivation behind presentation processors is to mitigate the CPU from illustrations occupations. 

Show processors can perform different undertakings like: making distinctive line styles, showing shading territories, and so forth. Ordinarily show processors are used to interface input gadgets, for example, mouse, joysticks.

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