grayscale_paperclip_processor

Grayscale processor for Paperclip gem

Usage:

Gemfile:

gem "grayscale_paperclip_processor"

Model:

has_attached_file :data,
  :processors => [:watermark],
  :styles => {
    :grayscale => {
      :processors => [:grayscale],
      :geometry => "361x226!"
    }
    :normal => "361x226#",
    ...