Image Representation Quiz

How are bitmap images represented by the computer?

• Binary

• Vectors

• ASCII

• Unicode

What is a pixel?

• It is an animated object in a game that can move or collide with other objects

• It is a single coloured 'dot' in a bitmap image

• It is a pair of coordinates that tell the computer where to draw a point on the screen

What is image resolution?

• It is the number of colours in an image

• It is the amount of pixels per inch in an image (width by height)

• It is a measure of how much an image has been compressed

What is the 'colour depth'?

• Is the amount of pixels per inch in an image (width by height)

• Is the amount of bits used to generate the colour in a single pixel

• The width of the image measured in pixels

Which compressed file format is often used for storing digital camera images?

• JPG

• SVG

• BMP

Why would an image be compressed?

• To increase its quality

• To change the colours it contains

• To make it smaller to store

How many colours can be used for each pixel if the colour depth is 8 bit?

• 8 colours

• 256 colours

• 255 colours

• 9 colours

How many colours can be used for each pixel if the colour depth is 4 bit?

• 4 colours

• 5 colours

• 15 colours

• 16 colours

Reducing the amount of colours in the image will

• Reduce the quality of the image

• Reduce the amount of binary needed for each pixel

• Make the file size larger

• Remove pixels from the image

Increasing the resolution of an image means that

• More pixels will be used to make up the image

• More colours will be used to make up the image

• The image size will be bigger