Representing bitmap images

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

Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

  • Click "Close Video"
  • Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Representing Bitmap Images

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which of these is the most accurate description of a pixel?

1/3

Q2.What is the minimum number of bits required for an image that has 16 colours?

2/3

Q3.A bitmap image has a colour depth of 2 and a resolution of 8 x 8. Calculate the file size of the image.

3/3

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Representing Bitmap Images

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which of these is the most accurate description of a pixel?

1/3

Q2.What is the minimum number of bits required for an image that has 16 colours?

2/3

Q3.A bitmap image has a colour depth of 2 and a resolution of 8 x 8. Calculate the file size of the image.

3/3

Lesson summary: Representing bitmap images

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Data Representation
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Representing sound

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