Representing bitmap images
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Lesson details
Key learning points
- 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.
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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
Q2.
What is the minimum number of bits required for an image that has 16 colours?
3
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.
256
512
64