data Flashcards
(8 cards)
1
Q
what is resolution (in images)?
A
the level of detail contained in an image.
2
Q
what is the formula for resolution (in images)?
A
pixels high x pixels wide.
3
Q
what is bit depth (/colour depth)?
A
the number of available colours per pixel.
4
Q
what is compression?
A
the process of reducing the size of a file.
5
Q
what is sample rate?
A
the number of times per second the bit depth is recorded.
6
Q
what is bit depth (for sound)?
A
the number of available levels of amplitude that can be recorded.
7
Q
what is lossy compression?
A
compression that removes data permanently to reduce file size.
+ takes up less space.
- worse quality.
8
Q
what is lossless compression?
A
compression that shrinks the whole file to reduce file size.
+ keeps original quality.
- takes up more space.
