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 –

[answerhappygod]

a) If each value of histogram is added by total number of pixels in image, say n, p(rk)=nk+n
b) If each value of histogram is subtracted by total number of pixels in image, say n, p(rk)=nk-n
c) If each value of histogram is multiplied by total number of pixels in image, say n, p(rk)=nk * n
d) If each value of histogram is divided by total number of pixels in image, say n, p(rk)=nk / n