Graphics

Question 1

The formula for resolution is:

Answer 1

Resolution = width x height

Question 2

Define bit-mapped graphic:

Answer 2

An image made of individual pixels

Question 3

Define pixel:

Answer 3

An individual picture element

Question 4

Define colour depth:

Answer 4

The amount of memory allotted to each pixel, therefore how many colours it can be

Question 5

How to calculate the total size of an image:

Answer 5

Resolution x colour depth, / 8 to get bytes, then convert to best units

Question 6

What’s metadata:

Answer 6

Data about itself - for pictures, stuff like colour depth, width, height, size of file, type of compression used

Question 7

Define vector graphic:

Answer 7

An image made of coordinates and objects (like lines)

Question 8

Which is larger, bit-mapped graphics or vector graphics:

Answer 8

For small images, bit-mapped can be smaller, but for large images vector graphics

Question 9

What are vector graphics good for:

Answer 9

Rescaling

Question 10

Define primitives:

Answer 10

The pieces of data needed to make a vector graphic, eg points, lines, curves, polygons, in some cases colour gradients