Test 2 revison Flashcards
shape of not gate and graph
1 input triangle
opposite to input
shape of and gate and graph
2 input chode shape
both have to be true for output
shape of or gate and graph
2 chode with overhang
if input on either equals true and if both
what are pixels
number of small bits
what do size and resolution mean
No of pixels in width and height
what does resolution mean
detail of image
what is colour depth
No of bits used to encode a colour
how many colours can you use with 2 bits of colour depth
only two colours
how many colours can you use with 3 bits of colour depth
you can use 8 colours
how to calculate a file size
find the No of pixels
times pixels by bit number
divide by 8 to get bytes
then convert to mb
how to work out how many pixels there are in an image
width x height
what is metadata and examples
it is data about the data;
camera make
time and location
what is analogue capturing
it captures continuous changes as changes in voltage
what is digital sound
it is done by sampling. can deal with continuous change they have to be on or off. doesn’t contain all the info
what is sampling rate and examples
No of samples per second:
CD = 44100 samples per sec =44.1 KHz
