There are two main types of digital images: analog images and bitmap images. Analog images contain continuous colors while bitmap images represent images as a grid of pixels made up of red, green, and blue color values. Each pixel in a true color bitmap requires 3 bytes (24 bits) of information to store the color, allowing for over 16 million possible colors. Higher resolution bitmap images have more pixels and therefore require more storage space. Vector graphics store pictures using geometric primitives like lines and shapes rather than pixels, allowing the images to be scaled without quality loss but limiting them to non-photo images. Bitmap and vector graphic file types support different kinds of images and uses.

2. Analog versus bitmap images

10. Bitmap vs. Vector graphics