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Q1: An image uses 512 x 512 picture elements. Each of the picture elements can take any of the 8 distinguishable intensity levels. The maximum entropy in the above image will be

A 2097152 bits

B 786432 bits

C 648 bits

D 144 bits

ANS:B - 786432 bits

Picture elements (pixel) = 512 x 512 = 262144 Information per picture element N = log2 M M = 2N 8 = 2N N = 3 Information for 262144 pixels = 262144 x 3 = 786432 bits Entropy is same as average information per message.



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