2.4

Question 1

How are bitmap images represented in binary ?

Answer 1

Image split up into pixels

Each pixel given a binary code…

Which represents the colour of that pixel

Each colour is given a unique binary code

Metadata stored alongside the image

Question 2

What is meant by a pixel ?

Answer 2

Smallest element that makes up an image

Question 3

Why is metadata included in a file ?

Answer 3

A computer needs to know the size of the image in terms of:

Height, width and colour depth in bits per pixel…

This allows the computer to recreate the image from binary

Question 4

How is resolution measured ?

Answer 4

Pixels per inch (PPI)

Question 5

Describe how the increase in resolution affects the file size of an image :

Answer 5

Resolution of the image is the pixels per inch

The more pixels per inch the greater the file size

Question 6

What is the resolution of an image ?

Answer 6

The pixels per inch of an image