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digital data
binary data made of 1’s and 0’s
analogue data
real-world data such as audio
bitmap images
images that are made up of pixels each assigned a colour value
resolution
this term refers to the clarity of an image
bit depth
this term refers to the number of colours an image can represent
formula for bit depth
2^n (where n is the number of bits)
metadata
data about data, stored within image files
file size formula
resolution x colour depth / 8
vector images
these type of images are made up of objects which are made from mathematical equations
advantages of vector graphics
they are scalable and may result in smaller file sizes
advantages of bitmap images
the variety of images that can be represented are not restricted
Note 
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