On Mon, Oct 15, 2012 at 8:30 PM, Tony Yu <tsyu80@gmail.com> wrote:

After my failed @grayscale decorator suggestion (sorry again Johannes for all the unnecessary work this caused you), I was thinking it might be nice to add an @each_channel decorator. The basic idea is that the decorator would check if the input image is RGB, and applies the grayscale function to each channel of an RGB image.

Now, here we have a winner :) Stéfan