Understanding Digital Images

This badge is awarded upon successful completion of the All Aboard introductory online lesson on Understanding Digital Images. The badge holder should be able to:

• Explain how (greyscale and colour) images can be represented digitally, clarifying the term 'pixels' and 'image histograms'
• Describe basic image editing and processing actions, such as changing brightness and contrast
• List the key parameters of a good quality image and briefly explain what is meant by 'HDR'
• Recognise the main image file types and their main characteristics
• Be able to recognise when compressed images can be appropriately used and their advantages/disadvantages
• Find collections of images online that are useful for education or design.