Question

The histogram of a digital image with gray levels in the range [0, L-1] is represented by a discrete function:

(a) h(r_k)=n_k

(b) h(r_k )=n/n_k

(c) p(r_k )=n_k

(d) h(r_k )=n_k/n

I had been asked this question by my school principal while I was bunking the class.

I would like to ask this question from Histogram Processing in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right choice is (a) h(r_k)=n_k

Easiest explanation: The histogram of a digital image with gray levels in the range [0, L-1] is a discrete function h(rk )=nk, where rk is the kth gray level and nkis the number of pixels in the image having gray level rk.