I have moved on from the Histogram Transformation tool... but for the sake of completeness there is another consideration about the MTF plot.
If generalized, that plotted function could also represent what happens when the low range and high range sliders are adjusted. Currently this isn't plotted which struck me as somewhat incomplete.
(By plotting the function, you can divine what the sliders do if the explanation in the manual isn't clear.)
For an adjustment of the low range the normalized y intercept would rise. A low range of -1 would graph the function beginning at a value of 0.5 with a new (flatter) slope.
A low range of -2 is a value of 0.66. (This pattern looks like the function (n)/(n+1)). Likewise the high range slider would make the right side of the plot fall with the new greater than zero intercept and flatter slope.
Somewhat off topic- but not certain if the observation had been mentioned before.
-adam
