The document discusses the importance of graphics in computing, explaining what graphics are and their necessity in applications like CAD and CAM. It provides an overview of hardware components involved in image creation, focusing on graphics cards, their types, and the differences between vector and raster display technologies. The document highlights the significance of RAM, CPU, and GPU in producing high-quality visuals for various uses, including gaming and video editing.

1. Presented by: MAHAM IQBAL
17/05/2016

2. Topics to be covered
What are graphics?
Why we need graphics?
Hardware use to create image/graphics?
What is graphics card?
Types & parts of graphics cards?
What are raster displays?

3. What are graphics
“ Visual representation of an object
OR
Any computer device or program that makes a
computer capable of displaying and manipulating
pictures.”

4. Why we need graphics
 One picture is worth of thousand words
 Graphics methods are utilized in Computer Aided
Design (CAD)
 Computer Aided Manufacturing (CAM)

5. Hardware used to create images
RAM
CPU
Graphics card
Hard drive

6. RAM(in case of integrated graphics card)
 Most common type of memory
 Electronic memory located on the computers
motherboard
 Programs are loaded in RAM ,while it is running
 Much faster as compare to other storage devices

7. CPU(in case of integrated graphics card)
 Brain of computer
 Responsible for processing of data inside computer
system
 Controls other components of system
 Graphics systems often use more than one
processor to help in processing of complex
instructions required by graphics programs

8. Graphics card?
 A piece of computer hardware that produces the
image you see on a monitor.
 The better your graphics card the better, and
smoother an image can be produced. This is
naturally very important for gamers and video
editors.

9. Parts of graphics card
Graphics processing unit(GPU)
a) It’s the brain of the graphics card and is what creates the visuals you see on
the screen. How powerful those GPU’s are will vary on the model you
select.
Video card
a) Built in RAM
b) Runs program without taking resources from the computer

10. Parts continue…
The driver software
 Software which allows your graphics hardware to communicate with your
operating system
 Photoshop, IPhoto and paint

11. Types of graphics cards
Integrated card
a) usually by Intel for use in their computers
b) bound to the motherboard
c) shares RAM with the CPU
Dedicated card
a) has its own RAM and Processor for generating its images
b) does not slow down the computer
c) higher performance than integrated graphics cards

12. It is possible to have both dedicated and integrated
graphics, however once a dedicated graphics card is
installed, the integrated card will no longer function
until the dedicated card is removed.

14. Display technologies
Two main types:
 Vector display
 Raster display

15. Vector display
• creation of digital images through a sequence of
commands or mathematical statements
• Early computer displays
• Control X,Y with vertical/horizontal plate voltage
• Often used intensity as Z (close things were
brighter)
• Often termed random scan displays.

16. Vector display
 Advantages
 very high resolution, limited only by monitor
 easy animation, just draw at different positions
 requires little memory (just enough to hold the display
program)
 Disadvantages:
 requires "intelligent electron beam, i.e., processor
controlled
 can't draw a complex image
 limited color capability (very expensive)

17. Raster display
 Series of adjacent parallel 'lines' which together
form an image on a display screen.
 Pixel: One dot or picture element of the raster
 Scan line: A row of pixels

18. Raster example

19. Difference of raster and vector
 The difference between vector and raster
graphics is that raster graphics are composed of
pixels, while vector graphics are composed of
paths.