Question

In contrast stretching, if r1=r2, s1=0 and s2=L-1 then which of the following is true?

(a) The transformation becomes a thresholding function that creates an octal image

(b) The transformation becomes a override function that creates an octal image

(c) The transformation becomes a thresholding function that creates a binary image

(d) The transformation becomes a thresholding function that do not create an octal image

This question was addressed to me in my homework.

The origin of the question is Basic Intensity Transformation Functions in section Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right choice is (c) The transformation becomes a thresholding function that creates a binary image

Easiest explanation: If r1=r2, s1=0 and s2=L-1,the transformation becomes a thresholding function that creates a binary image.