Question

In Histogram Matching r and z are gray level of input and output image and p stands for PDF, then, what does pz(z) stands for?

(a) Specific probability density function

(b) Specified pixel distribution function

(c) Specific pixel density function

(d) Specified probability density function

The question was posed to me in an interview for internship.

My query is from Histogram Specification and Use of Histogram Statistics for Image Enhancement in chapter Image Enhancement of Digital Image Processing

Answer 1

Right answer is (d) Specified probability density function

The best I can explain: In Histogram Matching, pr(r) is estimated from input image while pz(z) is Specified probability density function that output image is supposed to have.