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9.3 Revision (Bitmaps (An image file represented in pixels, Bits per pixel…
9.3 Revision
Bitmaps
An image file represented in pixels
Bits per pixel
File Size = H x W x Colour depth
Compression
Lossy - lose some to decreases file size
Lossless - compresses to decrease file size
RLE - looks for patterns in code to decrease file size - Lossless compression
Hexadecimal
Used to define unique colours - one of 16 million
1 - 9 normal numbers
10 - 16 A, B, C ect.
Convert using grid - 16 x first number and 1 x second number
Vector
Does not distort while zoomed
Graphics stored as formulae
Binary
Goes right to left
Base 2 number system