CG01 introduction.ppsx

01-11-2022 Source of the images: Hearn & Bekar 1

Computer Graphics are pictures that are generated by a computer
Computer Graphics is a field of computer science that deals with
computerized Image synthesis
Suppose we want to draw a triangle

An abstract continuous space where we want to draw
triangle
- Object Space
What we have envisioned after drawing the triangle
- Object Definition
Continuous space having triangle
- Image Space

To define triangle in its coordinate system–
- Geometric representation
Placement of triangle in space –
- Transformation
Triangle can be drawn on a monitor –
Pixel by pixel..
This is called-
- Scan Conversion
Continuous Space
Continuous space

Distortion is introduced during scan conversion
Continuous Space (Vector image)
Scan conversion
Discrete Space (Raster Image)
This is called Aliasing
Anti-aliasing

This letter A itself is a graphics in CG
and
This is drawn from a library of characters shapes
Computer Graphics also involve the study of TOOLS that are used to design such pictures
Computer Graphics Tools
Hardware Tools
Software Tools

Hardware tools include –
• Video monitors and printers that display graphics
• Input devices like a mouse or trackball that let a user point to
items and draw figures
• The computer along with its special circuitry to facilitate
graphical display or image capture.
Hardware Tools
Software Tools

Hardware Tools
Software Tools
Operating system
Editor
Compiler
Debugger
a collection of “graphics routines” that
produce the pictures themselves
Programming Environment Tools
Graphics Tools & Graphics Standards

Some Applications of Computer Graphics

- Used in Engineering, architectural systems
- in designing of buildings, automobiles, aircraft, watercraft, spacecraft, computers,
textiles, home appliances

CG01 introduction.ppsx

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