If h(rk) = nk, rk the kth gray level and nk total pixels with gray level rk, is a histogram in gray level range [0, L ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1]. Then how can we normalize a histogram?

If each value of histogram is added by total number of pixels in image, say n, p(rk)=nk+n

If each value of histogram is subtracted by total number of pixels in image, say n, p(rk)=nk-n

If each value of histogram is multiplied by total number of pixels in image, say n, p(rk)=nk * n

If each value of histogram is divided by total number of pixels in image, say n, p(rk)=nk / n

If h(rk) = nk, rk the kth gray level and nk total pixels with gray lev

1.	If h(r_k) = n_k, r_k the kth gray level and n_k total pixels with gray level r_k, is a histogram in gray level range [0, L ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1]. Then how can we normalize a histogram?
A.	If each value of histogram is added by total number of pixels in image, say n, p(r<sub>k</sub>)=n<sub>k</sub>+n
B.	If each value of histogram is subtracted by total number of pixels in image, say n, p(r<sub>k</sub>)=n<sub>k</sub>-n
C.	If each value of histogram is multiplied by total number of pixels in image, say n, p(r<sub>k</sub>)=n<sub>k</sub> * n
D.	If each value of histogram is divided by total number of pixels in image, say n, p(r<sub>k</sub>)=n<sub>k</sub> / n
Answer» E.

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If h(rk) = nk, rk the kth gray level and nk total pixels with gray level rk, is a histogram in gray level range [0, L ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1]. Then how can we normalize a histogram?

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If h(r_k) = n_k, r_k the kth gray level and n_k total pixels with gray level r_k, is a histogram in gray level range [0, L ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1]. Then how can we normalize a histogram?