Digital Imaging

Question 1

What are bitmap graphics?

Answer 1

They are made up of lots of pixels and information about each pixel is stored in the images.

Question 2

What are vector graphics?

Answer 2

Stores information about geometrical objects or instructions for drawing shapes - not the image itself.

Question 3

Explain 3 advantages of vector.

Answer 3

1) Smaller memory size as vector has smaller files
2) Easier to transform vector graphics. No loss of quality when resizing.
3) Smaller files mean quicker upload and download times

Question 4

What is a pixel?

Answer 4

A dot of light.

Question 5

What can both types do?

Answer 5

They can be resized to suit the purpose.

Question 6

Which graphic loses quality when enlarged?

Answer 6

Bitmap

Question 7

How are the numbers of pixels on a bitmap measured?

Answer 7

Pixels per inch/cm

Question 8

Name 3 different types of background that can be added to an image.

Answer 8

1) Transparent
2) White
3) Colour

Question 9

How much memory do each type of background use?

Answer 9

1) Transparent = least amount of memory
2) White = mediocre amount of memory
3 Colour = most amount of memory