Question

What is/are the approach(s) of the gray-level slicing?

(a) To give all gray level of a specific range high value and a low value to all other gray levels

(b) To brighten the pixels gray-value of interest and preserve the background

(c) All of the mentioned

(d) None of the mentioned

I had been asked this question in a national level competition.

This interesting question is from Piecewise-Linear Transformation Functions in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

The correct choice is (c) All of the mentioned

Easy explanation: There are basically two approach of gray-level slicing:

One approach is to give all gray level of a specific range high value and a low value to all other gray levels.

Second approach is to brighten the pixels gray-value of interest and preserve the background.