Multimedia 1

What is the smallest unit of a bitmap image?

• Byte

• Dot

• Pixel

• Grid

What does 'bit depth' represent in an image?

• Image file size
  

• Colour of a pixel

• Image resolution

• Image dimensions

How many colours can be represented with 8-bit colour depth?

• 512

• 1024

• 128

• 256

What is the formula to calculate the size of a bitmap image in bytes?

• Bit depth × 8 ÷ resolution

• Width × Height × Bit depth ÷ 8

• Width + Height + Bit depth

• Resolution ÷ Bit depth × 8

What happens when you increase the resolution of an image?

• File size decreases
  

• Image gets pixelated
  

• Image becomes smaller
  

• File size increases

What does the term ‘image resolution’ refer to?

• Number of colours in the image
  

• Size of the image on screen
  

• Number of pixels that make up the image
  

• Size of each pixel

What is screen resolution typically expressed as?

• Dots per inch
  

• Pixels per centimetre
  

• Number of colours
  

• Number of horizontal × vertical pixels

What is DPI or PPI a measure of?

• File size
  

• Bit depth
  

• Sampling resolution

• Pixel density

Increasing the bit depth of an image will:

• A) Reduce the number of colours
  

• B) Increase the number of pixels
  

• C) Improve colour detail
  

• D) Decrease image resolution

. What effect does reducing the image resolution have?

• A) File size increases
  

• B) More colours are visible
  

• C) Image becomes sharper
  

• D) Image may lose detail