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Images store a two dimensional array. Uncompressed data thus uses up roughly: x dimension * y dimension * size of one channel (usually 1-4 bytes)* number of channels per layer (usually 3-5) * number of layers Note this is a big number for big images. Much of this data is redundant because many layers contain areas of same color etc. Compression acts on ...


Bits. A bit is a single unit of data. A group of bits forms a byte. Generally there are 8 bits per single byte. Groups of bytes form a kilobyte 8bits = 1 Byte 1024 bytes = 1 kilobyte (kb) 1024 Kilobytes = 1 Megabyte (mb) 1024 Megabytes = 1 Gigabyte (gb) 1024 Gigabytes = 1 Terabyte (tb) 1024 Terabytes = 1 Petabyte (pb) ... and so on RGB images are ...

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