Lesson details

Key learning points

  1. In this lesson, we will learn how bitmap images are represented in binary. We will learn about resolution, bit depth and how to calculate the file size of a bitmap image.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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3 Questions

Q1.
Which of these is the most accurate description of a pixel?
A square represented by 2 bits
The file size of an image
The resolution of an image
Correct answer: The smallest element of an image
Q2.
What is the minimum number of bits required for an image that has 16 colours?
3
Correct answer: 4
5
6
Q3.
A bitmap image has a colour depth of 2 and a resolution of 8 x 8. Calculate the file size of the image.
Correct answer: 128
256
512
64