Question

For a local enhancement using mean and variance, what happens if the lowest value of contrast is not restricted as per the willingness of acceptance of value?

(a) There wouldn’t be any enhancement

(b) Enhancement will occur for areas with standard deviation value > 1

(c) Enhancement of the constant areas will also be the part of procedure

(d) Enhancement will occur for areas with standard deviation value > 0 and < 1

The question was asked in a national level competition.

Asked question is from Histogram Specification and Use of Histogram Statistics for Image Enhancement in portion Image Enhancement of Digital Image Processing

Answer 1

Correct answer is (c) Enhancement of the constant areas will also be the part of procedure

Explanation: If the lowest value of contrast is not restricted as per the willingness of acceptance of value, the Enhancement of the constant areas will also be the part of procedure, since a constant area has standard deviation value 0.