Step 1: What makes a good visual output?

– Watch the video in the attached link to see How Computer Game graphics improved over the years. Now try to list ways how visual output improved over the years.

Step 2: Resolution, Colour Depth and Refresh Rate
– Watch these videos about resolution and bit/colour depth to get a better understanding of these two qualities that determine how clear and colourful an image is.

Step 3: What have I learnt so far?
– Try this online exercise about the quality of a visual output

Step 4: A close look at Vector & Raster Graphics

Images can be of two types: vector and raster.  These types of images have different characteristics and so different uses.

– Watch these videos to get a better understanding of vector and raster graphics and image file formats.
– Try this online exercise about raster and vector output.

Step 5: Lesson Summary
– Let’s recap all we’ve learnt so far by trying out Activity 7: ‘Factors effecting the quality of a visual output’. (Refer to ‘Activity Sheet L4 & 5.pdf’ in the resource section)

– Check your answers to Activity 7 using the Answer Sheet available in the resource section.

Go Further!
– Watch: Vector Images Explained
– Read: Raster vs Vector Graphics

Note: You will complete this Activity Sheet in our next lesson in this topic

Well done! Now you are ready for the fifth lesson in this topic: Input & Output Devices – Lesson 5: Visual Output Devices