Graphics hardware and introduction to Raster display system

Graphics hardware and introduction to Raster display system.graphics card is a hardware component use to crest graphics.

1. Graphics Hardware & Raster display Presented by: MAHAM IQBAL 17/05/2016

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

3. What are graphics “ V isual 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 (i n case of integrated graphics card) Most common type of memory  E lectronic 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) 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 Built in RAM 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 I ntegrated card usually by  Intel for use in their computers bound to the motherboard shares   RAM with the  CPU Dedicated card has its own RAM and Processor for generating its images does not slow down the computer 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.

13. Raster Display

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 S eries 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.

20. Thank you