You are viewing a free preview of this lesson.
Subscribe to unlock all 10 lessons in this course and every other course on LearningBro.
Computers store images as collections of tiny dots called pixels. This lesson explains how bitmap images are represented in binary, and the factors that affect image quality and file size.
A bitmap image is made up of a grid of pixels (picture elements). Each pixel is a single coloured dot. When you zoom into a bitmap image, you can see the individual square pixels.
The computer stores a binary value for each pixel that represents its colour. The entire image is stored as a long sequence of binary values — one for each pixel.
Resolution refers to the number of pixels in an image, usually expressed as width × height (e.g. 1920 × 1080 pixels).
Colour depth is the number of bits used to represent the colour of each pixel.
Subscribe to continue reading
Get full access to this lesson and all 10 lessons in this course.