Computer Graphics

Computer graphics are pictures and films created using computers. Usually, the term refers to computer-generated image data created with the help of specialized graphical hardware and software. It is a vast and recently developed area of computer science.

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2. Presented By Hasan Ahmed Khan 152-15-5587 Foysal Ahmed 152-15-5738 Tanvir Anjum 151-15-5158 Nadim Mahmud Nayem 152-15-5772

3. Computer Graphics Computer graphics are pictures and films created using computers. Usually, the term refers to computer-generated image data created with the help of specialized graphical hardware and software. It is a vast and recently developed area of computer science.

4. Basic Elements of CG Many Computer graphics application involve: Modeling Choice of representation Rendering Geometry, Visibility. Mapping from real world to Image space. Animation Interaction

5. Computer Aided Design Animations are often used in CAD applications . Real-time animations using wire frame displays are useful for testing performance of a vehicle . Wire frame models allow the designer to see the interior parts of the vehicle during motion . When object designs are complete, realistic lighting models and surface rendering are applied.

6. Computer Graphics for Movies The entertainment industry plays many important role in the field of computer graphics. Leaders in quality and artistry. Not slaves to conceptual purity. Big budget and tight schedule. Constant reminder that there is more to computer graphics than technology.

7. Image Processing Computer graphics is used to create a picture . Image processing applies techniques to modify or interpret existing pictures . To apply image processing methods, the image must be digitized first . Medical applications also make extensive use of image processing techniques for picture enhancements, simulations of operations, etc.

8. Graphical User Interface A major component in GUI is a window . Multiple windows can be opened at a time . To activate any one of the window, the user needs just to check on that window . Menus and icons are used for fast selection of processing operations. Icons are used as shortcut to perform functions.

9. Direct View Storage Tube An alternative method for maintaining a screen image is to store the picture information inside the CRT instead of refreshing the screen. A direct-view storage device stores the picture information as a charge distribution just behind the phosphor coated screen. Two electron guns are used, the primary gun is used to store the picture pattern, the second, the floor gun, maintains the picture display.

10. Continuing Advantage Because of no refreshing is needed very complex pictures can be displayed at very high resolutions without flicker . Disadvantage it can not display colors, and selected parts of a picture can’t be erased.