Cumulative sum of histogram applied to an image

Histogram Normalization

hist = hist / (Nb_ligne * Nb_colonne)

Cumulative sum of normalized histogram

hist_sum_cumul = Sum_cumul(hist)

Denormalization

hist_sum_cumul = round(hist_sum_cumul * 2^k)

pixel^modif_{(x, y) = hist_sum_cumul(pixel(x, y))}