Year 9 - HF3: 3 - Representing Images

Images can be represented using a sequence of 0s and 1s

• TRUE
• FALSE

Define the term 'pixel'

• a single square in an image
• a dot of 0 or 1 in an image
• a single square of colour in an image
• a single point of colour in an image

What does the pixel resolution refer to?

• the total number of pixels in an image
• the height x the width
• the total number of dots in an image
• the number of pixels in an image

What is the pixel resolution of an image of dimensions 200 x 100?

• 20,000
• 200,000
• 200
• 100

Each pixel in an image has a possibility of 16 colours. What is the colour depth?

• 2 bits
• 3 bits
• 4 bits
• 5 bits

How many total colours can be used in an image with a colour depth of 6 bits?

• 16 colours
• 32 colours
• 64 colours
• 128 colours

An image has a height of 200 pixels, width of 400 pixels and a colour depth of 3 bits. What is the file size in bytes?

• 240,000
• 24,000
• 300
• 3000

The file size of an image is 9kB. The height and width are 300 and 400 pixels. What is the colour depth used in the image?

• 5 bits
• 6 bits
• 7 bits
• 8 bits

What is the bit pattern of the image? (Black is 00 and white is 01)

• 010
  101
  101
  010
• 001100
  110011
  110011
  001100
• 000100
  010001
  010001
  000100
• 010001
  000100
  000100
  010001

If I increase the colour depth of an image from 2 bits to 4 bits, how many more colours can I use?

• 12
• 4
• 16
• 2