CS Unplugged: Image Representation - Colour by Numbers
Use the Colour by Numbers offline activity to explore how a B&W image is made up of pixels, shown as black or white dots which are represented by either a 1 or 0. Using a 0 or 1 to represent a white or black square students create an image on a grid. They supply the coded message for someone else to recreate. Support your teaching and learning with video clips and other related resources.
Additional details
| Year band(s) | Foundation, 1-2, 3-4, 5-6, 7-8 |
|---|---|
| Format | Web page |
| Core and overarching concepts | Data representation |
| Australian Curriculum Digital Technologies code(s) |
AC9TDIFK02
Represent data as objects, pictures and symbols
AC9TDI2K02
Represent data as pictures, symbols, numbers and words
AC9TDI4K03
Recognise different types of data and explore how the same data can be represented differently depending on the purpose
AC9TDI6K04
Explore how data can be represented by off and on states (zeros and ones in binary)
AC9TDI8K03
Investigate how digital systems represent text, image and audio data using integers
AC9TDI8K04
Explain how and why digital systems represent integers in binary |
| Keywords | Data representation, Image Representation, Pixels, Binary |
| Organisation | University of Canterbury, New Zealand |
| Copyright | Creative Commons BY-NC-SA 4.0 |
Related resources
-
Home automation: General purpose programming
Investigate home automation systems, including those powered by artificial intelligence (AI) with speech recognition capability.
-
Is it a pig or a dog?
By drawing animals in different circumstances to represent different ideas, students learn about abstraction and data representation.
-
Pixels and binary digits
Students are given a bitmap image made up of coloured pixels.
-
Class blog
In this lesson sequence students investigate features of a good blog focusing on such things as the concept, purpose, audience and critical features.
-
Representing text, images and sound
Learn about how text, images and sound are represented in binary.
-
Introduction to binary
This sequence of lessons focuses on what a binary number is, what a decimal number is, why binary numbers are important in digital systems and how to read and understand a binary number.
-
CS Unplugged: Field guide: Data Representation
An online resource for teaching Computer Science to students, this chapter focuses on Data Representation.
-
CS Unplugged: Text Compression
Use these activities with your students to explore how a computer stores information as efficiently as possible.