Question

For what value of the output must the Power-law transformation account for offset?

(a) No offset needed

(b) All values

(c) One

(d) Zero

This question was posed to me by my college professor while I was bunking the class.

I'm obligated to ask this question of Intensity Transformation Functions in division Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right choice is (d) Zero

For explanation I would say: When the output is Zero, an offset is necessary.