a single element of an image on a computer screen

a binary digit, the basic unit of data within a computer system that has the value 0 or 1

a colour model used to represent and create colours by combining three colours of light: red, green and blue

the strength of a colour, shown by the value of each element (red, green or blue)

Representing images with binary data

Computing

File size of digital images

Manipulating digital images

Representing sound with binary data

Editing sound

File size and compression

In this unit, pupils will focus on digital media such as images and sounds, and discover the binary digits that lie beneath these types of media. They will explore how images and sound can be manipulated and consider the link between quality of images and sound and the resulting file size.

Data representation: images and sound

What is the basic unit of data in computing?

What is the maximum number of colours can be represented by 2 bits per pixel?

What does the term 'intensity' refer to in digital imaging?

How many pixels are in an image that has a grid of 5 x 5 pixels?

Representing images with binary data

Lesson outcome