Image colour depth and resolution questions and answers
Q1. Explain why file size is important when using the Internet.
A1. Large files take longer to download than smaller files. Large files take up more storage once downloaded.
Q2. What is meant by the colour depth of a picture?
A2. The number of bits used to store the information about each pixel. The more bits you use, the bigger the range of colours and shades you can store.
Q3. What is meant by ‘picture resolution’ when talking about computers?
A3. Resolution is the word used to describe how clear text and graphics appear on a computer
Q4. How is resolution measured?
A4. Pixels per area e.g. pixels per square inch.
Q5. What is meant by a 'low resolution picture'?
A5. A low resoultion picture is one that potentially lacks great detail as few pixels per unit area are used.
Q6. What is meant by a 'high resolution picture'?
A6. This is a picture that has many pixels per unit area and potential has a lot of fine detail and clarity.
Q7. What happens when you keep zooming into a bitmap picture?
A7. Eventually, you will get to the point where you can see each pixel.
Q8. What is the colour depth of a picture that stores the colour information about each pixel using four bits?
A8. It's colour depth four.
Q9. What is the colour depth of a picture that stores the colour information about each pixel using eight bits?
A9. It's colour depth eight.
Q10. What does 'VDU' stand for?
A10. Visual Display Unit.