I'm out of town for a few days with only my iPad, so I played around with some images with the iPhoto for iPad app. It has duo tone presets that are selected via a slider. By touching another button, 1 or 2 tones are added from the original. As far as I can tell, the app chooses those tones rather than any control by me. Some of the choices are very interesting, but it changes the image beyond a duo tone or even a quad-tone, I think. I did go back and de-saturate some of the tones that seemed too bright, but it's all at the experimental state for me. It was fun to just "paint" with my finger and not worry too much about exact control of details. Thanks for looking!







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