[Digikam-devel] [Bug 144155] wrong(?) histogram y-axis when blown-out over/underexposure

[Arnd Baecker]

> >in digikam you would have to use logarithmic scale to see anything --but that's
> >not intuitive for photography work.
>
> Why it's not intuitive ? It work perfectly...

Well, while it works perfectly, there are many people
who are not familiar with logarithmic representations ;-)

So the histogram y-axis is surely not wrong
for over/underexposure, cutting off the upper part
of the histogramm looks like a good solution.

But how to determine the cut-off value?
Maybe
  cut_off = min( maximal_value_of_histogram, 2*vertical_variance)
or one determines the cut-off as
the largest maximum on the interval [0.1, 0.9] ?