Question: If r be the gray-level of image before processing and s after processing then which expression defines the power-law transformation, for the gray-level in the range [0, L-1]?
Options
A : s = L – 1 – r
B : s = cr?, c and ? are positive constants
C : s = c log (1 + r), c is a constant and r ? 0
D : none of the mentioned
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