KS3 Data representation

What is a pixel?

• Picture element - the small dots that make up an image.
• How an image is stored on the computer.
• A type of image
• A special type of photograph

A bitmap image is made up of

• Pixels
• Colours
• Sounds
• Samples
• Characters

The number of pixels per inch in an image is known as the

• Dimensions
• Colour depth
• Resolution
• Megapixels

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

The binary code for each pixel is used to determine

• Which colour will be displayed
• How big the image is
• What shape the image is
• How many pixels will be in the image

Which is NOT an effect of increasing the resolution in an image?

• More colours can be displayed.
• More binary will be required to create the image.
• Larger file size
• Higher quality image

Most graphic formats create many colours from:

• Red, green, blue.
• Red, pink, yellow.
• Red, white, blue.
• Black, white, green.

In a bitmap graphic each pixel is represented in _______

• Denary

• Binary

• Hexadecimal

• By letters

How many bits per pixel do you need to make 4 colours?

• colour depth of 1

• colour depth of 2

• colour depth of 3

• colour depth of 4

What is the colour depth of the image?

• colour depth of 1

• colour depth of 2

• colour depth of 4

• colour depth of 16