how can I extract image intensity values and levels from histogram of an image?

Please help me in obtaining polynomial structure from the image intensity values and levels.

[KALYAN ACHARJYA]

How do you get image histogram? Those all values represent the histogram are pixel values (intensity values).

Check here

[Avinash Bhatt]

Sir, I am using imhist() to obtain the histogram and using this I want to obtain piecewise polynomial structure

[KALYAN ACHARJYA]

Avinash, please Attach image?