Question

Using gray-level transformation, the basic function linearity deals with which of the following transformation?

(a) log and inverse-log transformations

(b) negative and identity transformations

(c) nth and nth  root transformations

(d) All of the mentioned

I had been asked this question in semester exam.

This intriguing question originated from Basic Grey Level Transformation topic in division Image Enhancement of Digital Image Processing

Answer 1

Right choice is (b) negative and identity transformations

The explanation is: For Image Enhancement gray-level transformation shows three basic function that are:

Linearity for negative and identity transformation

Logarithmic for log and inverse-log transformation, and

Power-law for nth and nth  root transformations.