The maths behind RGB images
In this lesson, students explore the RGB (Red, Green, Blue) colour model commonly used in digital imaging and display systems. They learn how each colour in the RGB model is represented by 8 bits and understand why there are 256 color intensities for each channel. Students will represent the 8 bits using their mathematical understanding of powers of 2. Additionally, they will practice converting decimal numbers (which use the digits 0 to 9) to binary.
Additional details
| Year band(s) | 7-8 |
|---|---|
| Content type | Lesson ideas |
| Format | Web page |
| Core and overarching concepts | Digital systems, Data representation |
| Australian Curriculum Digital Technologies code(s) |
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 | pixel, images, colour model, bytes |
| Organisation | ESA |
| Copyright | Creative Commons Attribution 4.0, unless otherwise indicated. |
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