gradient creates a sloped histogram...why?

[kkamin]

http://i267.photobucket.com/albums/i...7/gradient.png

When I create a gradient in PS, why are the ends of the histogram sloped upwards? Shouldn't it be an even distribution on tones and the histogram should be a black rectangle basically? Is it something to do with compensating for our visual perception?

Take a look at the screen shot link above.

[Doug Nelson]

Set the Smoothness to 0%

Gradients with those cup-shaped histograms actually look more correct.

[kkamin]

Thanks Doug!