Graphics Flashcards
What are Bitmap graphics?
- Made up of pixels where each pixel has a position
- Large images need more dots to maintain the quality
- Sometimes known as raster images
- Used for photographs and images with shading
What are Vector graphics?
- Consist of equations
- Components are also described by length, thickness and colour
What are the advantages of vector graphics over bit mapped graphics
- Vector drawings can be enlarged to any size without any loss in quality
- Vector graphics are ideal for company logos as they can be greatly enlarged
- Files are smaller that bitmaps taking up less storage space
- Load faster
What is a Pixel?
Is a dot of colour or picture element of a graphic that is a particular colour
What is a resolution measured in?
Pixels
What is the resolution of an image?
How many pixels per square inch (PPI)
The more pixels per square inch the…
greater the density of dots so the higher the quality of the picture
What is the resolution of printers measured in?
Dots per Inch (DPI)
How do you work out the number of megapixels?
Vertical and Horizontal multiple then divided by one million
Digital cameras memories are measure in…
Gigabytes
What is one gigabyte?
1024 x 1024 x 1024
What are images made up of?
Layers
