3d Viewing in Computer Graphics

3d Viewing in Computer Graphics

      Two stages to the 3D to 2D transformation

• First a clipping,
• Then a projection.

The view volume of a perspective projection is the infinite volume defined by the combination of the PRP and the view window, which defines a pyramid. This can be contrasted to the view volume for a parallel projection which gives an infinite parallelepiped.

Viewing in Computer Graphics

Viewing in Computer Graphics

Viewing refers to positioning the camera in a coordinate frame and projection of the 3D object onto the 2D image plane of the camera.

Display Primitives | Computer Graphics

Computer Graphics Display Primitives

1- Graphics (modeling & rendering) primitives
2- Points, lines, polygons
3- Various line-drawing algorithms
4- DDA and Mid-point Line Drawing Algorithms
5- Circles drawing
6- Mathematical concepts
      a)line equations
      b)parametric representation, implicit
7- Functions, vectors and matrices

Computer Graphics Design

Computer Graphics Design

Mechanism for video display
1-CRT principle and structure
2-Frame buffer
3-Dot size, resolution
4-Refresh rate
5-Shadow masking in colored CRTs
Logic structure for other display
1-LCD
2-Plasma display
Conceptual Models for CG
1-Application Model
2-Application Program
3-Graphics System

I/O Devices
1-Printers and Plotters

Key Components of a Computer Graphics Design System

1-Video controller
2-Display processor

Components of Computer Graphics and Design

Modeling:
Defining objects in terms of primitives, coordinates and characteristics.
Storing:
Storing scenes and images in memory and on disk.
Manipulating:
Changing the shape, position and characteristics of objects.
Rendering:
Applying physically based procedures to generate (photo-realistic) images from scenes (using lighting and shading).
Viewing:
Displaying images from various viewpoints on various devices.

Computer Graphics and Design

Computer Graphics and Design

“A human oriented system that uses the capabilities of a computer to create, transform and display pictorial and symbolic data”.

Why study Computer Graphics?

1-Core component of every computer system.

2-Essential part of computer science curriculum.

3-Plays an important role in every day life applications.

Broad range of applications 
1-CAD
2-Educations and Trainings
3-Graphical Representations
4-Entertainment
5-Visualization
6-Image processing
7-Medical