graphics theory. learning objectives learn about use of graphics & their importance identify...
TRANSCRIPT
Graphics Theory
Learning Objectives
• Learn about use of graphics & their importance
• Identify what makes a good graphic & why
• Recognise different graphic formats
Starter TaskCan you name these graphics and logos below?
1. 2. 3. 4.
5. 6.8.
9.10. 11.
12.
7.
What are graphics?
‘A picture is worth a
thousand words’
• A graphic is a visual representation of a word/s or occurrence/event
• Graphics can be paper-based or electronic• Virtually all graphics today are electronic
Why are they so important?
• Eye catching image that captures a persons interest within an instant
• Can be more powerful than text
• Can be a representation of an organisation, e.g. a company logo or football team badge
File Types
• JPEG
JPEG stands for Joint Photographic Experts Group.
It is basically a compression tool for images.
•BMP
A bitmap image defines the colour of every pixel in the image.
Good for high quality images but it uses a lot of memory.
File Types
PNGThe Portable Network Graphics (PNG) format is one of the most recent formats.
This format was created as freeware.
•GIFGraphics Interchange Format
GIF is a common way of compacting bitmap images.
Vector vs Bitmap
• Which graphic loses quality when resizing?
Check it out at
• https://www.youtube.com/watch?v=fy9Pby0Gzsc
The software
There are many types of software for image
Manipulation, the most commonly used are:
• Jasc Paint Shop Pro
• Macromedia Fireworks
• Adobe Photoshop
Pixelation Pixelation is an
effect caused by displaying a bitmap at such a large size that individual pixels, are visible to the eye.
Pixelation [2]Early graphical applications ran at low resolutions with a small number of colours, and had visible pixels. The resulting sharp edges gave curved objects and diagonal lines an unnatural appearance.
Anti - AliasingAnti-aliasing is the process of blurring sharp edges in pictures to get rid of the jagged edges on lines. After an image is rendered, some applications automatically anti-alias images.
Original image Anti aliased image
Your mission!!!!
• Name 4 common file types.
• Explain what lossy and lossless images are. (bitmap & vector based etc)
• Describe anti-aliasing.
• Describe Pixilation and show an example.