Bitmap and Vector imaging

There are 2 major 2D graphic types, these are Bitmap and Vector imaging.
Bitmap images (also known as raster images) are made up of pixels in a grid, pixels are like individual dots of colour, that make up an image. Bitmap images are resolution dependant. Resolution refers to the number of pixels in an image and is usually stated as dpi (dots per inch) or ppi (pixels per inch). Bitmap images are displayed on your computer screen at screen resolution: approximately 100 ppi. Because bitmaps are resolution dependent, it's difficult to increase or decrease their size without sacrificing a degree of image quality.

Vector images are made up of many individual, scalable objects. And compared to bitmap images, use mathmatical equations so always scale to the highest quality. They are resoluation independant, how ever a disadvantage is they only use basic shapes to create images compared to bitmap which can create a more detailed image.