[dluong]

With regard to portion sizes, you could have users put a "standard" object in the photo, such as a dollar bill, credit card, teaspoon, or quarter, iPhone, etc. into the photo as reference sizes. Eggs are also reasonably consistent, so in photos with eggs, that could work also. Love the idea (I had it myself a long time ago, but too many things to do and not enough time) and hope this takes off!