Images

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Images

Post  admin on Tue 20 Jul 2010, 7:48 am

The bit depth describes the number of data bits needed to store each pixel in an image. This sets the number of possible colours each pixel. A higher bit depth will allow a larger amount of different colour combination to be stored, whilst a lower bit depth will allow only a smaller amount of colour combinations. The higher the bit depth, the larger the file is and more storage capacity is needed to store the data.
Bit Depth / Number of Colours / Relationship
1 / 2 / Colours = 2^1 = 2
2 / 4 / 2^2 = 4
3 / 8 / 2^3 = 8
4 / 16 / 2^4 = 16
8 / 256 / 2^8 = 256
16 (High Colour) / 65,536 / 2^16 = 65,536
24 (True Colour) / 16,777,216 / 2^24 = 16,777,216

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