Image Representation

How many colours can there be if the image has 1 bit per pixel?

• 4

• 1

• 2

• 3

How many colours can there be if the image has 2 bits per pixel?

• 4 Colours

• 2 Colours

• 2 Colours

• 8 Colours

• 16 Colours

How many colours can there be if the image has 3 bits per pixel?

• 4 Colours

• 2 Colours

• 1 Colours

• 8 Colours

• 16 Colours

How many bits do you need to be able to store 16 colour?

• 2 bits

• 4 bits

• 8 bits

• 16 bits

• 32 bits

Images on a screen are actually lots of tiny blocks of colour joined together into something called a bitmap.

• False

• True

........ is a grid format with each box on the grid containing one “Picture element” which is better known as a “Pixel”

• Vector image

• Analogue image

• Bitmap image

Pixel is ......

• the smallest element of a sound file

• One Byte

• the smallest element of a picture

• 2 Bytes

In black and white images each pixel uses ....

• 4 bits

• 8 bits

• 1 bit

• 2 bits

....... is measured in “dots per inch” (DPI) or “pixels per inch” (PPI)

• Colour depth

• Colour

• Resolution

• Sound

What is meant by DPI?

• Dynamic points per inch

• Dots per inch

• Pins per inch