Comparing bitmap and vector graphics
Lesson details
Learning outcome
I can compare vector and bitmap images and consider which image type best suits which situation.
Key learning points
- Vector images are made from shapes and paths so they stay sharp when resized.
- This makes them good for logos or icons which need to be presented in different sizes.
- Bitmap images are made from pixels. They can lose quality when resized and are better for photos and detailed pictures.
Keywords
Bitmap - images that are made from pixels
Pixel - a single element of an image on a computer screen
Common misconception
Vector images are better than bitmap images in every situation.
Vector and bitmap images are suited to different tasks. Vectors are best for simple, scalable designs like logos, while bitmaps are better for detailed images like photos.
Teacher tip
Use zoomed-in examples of both image types side by side to clearly show the difference in quality when resized. This visual comparison helps pupils understand why each format is better for certain uses.
Equipment
Pupils will need access to a device with vector graphic editing software. Examples in this lesson use Inkscape https://oak.link/inkscape
Licence
Lesson video
Loading...
Prior knowledge starter quiz
6 Questions
Q1.What does SVG stand for?
Q2.How does an SVG file store an image?
Q3.What can you change in SVG markup to move a shape?
Q4.Put these actions in order when editing an SVG image:
Q5.Match each keyword to its description:
Code that holds details of vector graphics
Ability to change size without losing quality
A graphic that can be resized easily
Where a shape appears on the canvas
Q6.What kind of details can be found in SVG markup for each shape?
Assessment exit quiz
6 Questions
Q1.What are vector images made from?
Q2.Which type of image is best for a company logo that needs to be shown in different sizes?
Q3.What are bitmap images made from?
Q4.Which type of image is best for a detailed photograph?
Q5.Match the image type to its best use:
Best for simple, scalable designs
Best for detailed pictures
An example of a bitmap image
An example of a vector image
Q6.Which statement about vector and bitmap images is incorrect?
To help you plan your 8 computing lesson on: Comparing bitmap and vector graphics, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 8 computing lesson on: Comparing bitmap and vector graphics, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 3 computing lessons from the Developing vector graphics unit, dive into the full secondary computing curriculum, or learn more about lesson planning.