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Year 9

Manipulating digital images

I can use graphics software to edit and manipulate digital images.

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New
New
Year 9

Manipulating digital images

I can use graphics software to edit and manipulate digital images.

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Lesson details

Key learning points

  1. Basic image editing with software can be combined to solve complex problems requiring image manipulation.
  2. Digital manipulation provides creative benefits but also ethical drawbacks.

Keywords

  • Scale - changing the width and height of the image in pixels

  • Prompt - the text description you give to the AI tool to tell it what kind of image you want it to create

  • Filter - a tool or effect that can be applied to an image to change its appearance

Common misconception

Generative AI always has a negative affect on society.

Generative AI isn't always negative; it depends on its use. Generative AI tools can help artists, educators and scientists create innovative designs, engaging learning materials and advanced simulations.


To help you plan your year 9 computing lesson on: Manipulating digital images, download all teaching resources for free and adapt to suit your pupils' needs...

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Show both positive and negative uses of AI. Discuss its benefits, risks and ethical concerns to help students develop critical thinking and a balanced perspective on AI.
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This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
What is the smallest unit of a bitmap image?
Correct Answer: pixel
Q2.
What system is used to create colours by combining three colours of light?
Correct Answer: RGB
Q3.
What happens when you increase the resolution of an image?
the image becomes smaller
the image quality decreases
Correct answer: the file size increases
the colour depth decreases
Q4.
What does 'bit' stand for in computing?
binary information transfer
basic interactive tool
bitrate
Correct answer: binary digit
Q5.
What does colour depth determine in a digital image?
the physical size of the image
Correct answer: the range of colours that can be displayed
the number of pixels in the image
the file format of the image
Q6.
What aspect of a digital image increases when you enhance its resolution or colour depth?
Correct Answer: file size

6 Questions

Q1.
Match the term with its definition:
Correct Answer:scale,the width and height of an image
tick

the width and height of an image

Correct Answer:filter,a tool to change an image's appearance
tick

a tool to change an image's appearance

Correct Answer:prompt,text description for AI image generation
tick

text description for AI image generation

Q2.
What does the zoom function allow you to do?
change the colour depth
adjust the file size
modify the image's resolution
Correct answer: view the image at different magnifications
Q3.
What does changing the colour depth from 256 colours to 16 colours do?
Correct answer: reduces the number of colours that can be used
increases the range of colours that can be used
changes the image's resolution
alters the image's file format
Q4.
What is the name of the text you type into an AI tool to generate an image?
Correct Answer: prompt, a prompt
Q5.
How can generative AI be beneficial in education?
by replacing teachers
Correct answer: by creating engaging learning materials
by reducing class sizes
by eliminating homework
Q6.
Why is it important to consider ethics in digital manipulation?
it ensures faster processing
it reduces costs
Correct answer: it prevents misuse and harm
it increases file size