The power-law transformation is given as: s = crᵞ, c and ᵞ are positive constants, and r is the gray-level of image before processing and s after processing. Then, for what value of c and ᵞ does power-law transformation becomes identity transformation?

The power-law transformation is given as: s = crᵞ, c and ᵞ are po

1.	The power-law transformation is given as: s = crᵞ, c and ᵞ are positive constants, and r is the gray-level of image before processing and s after processing. Then, for what value of c and ᵞ does power-law transformation becomes identity transformation?
A.	c = 1 and ᵞ < 1
B.	c = 1 and ᵞ > 1
C.	c = -1 and ᵞ = 0
D.	c = ᵞ = 1
Answer» E.

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The power-law transformation is given as: s = crᵞ, c and ᵞ are positive constants, and r is the gray-level of image before processing and s after processing. Then, for what value of c and ᵞ does power-law transformation becomes identity transformation?

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