The number of worldwide camera phone users will reach 2 billion and the number of camera phone photos shared annually will double to 22 billion by 2015, according to a recent study by InfoTrends, a worldwide technology strategy firm.

In its 2011 report focusing on the future of mobile phone technology, InfoTrends said this expected migration will be the result of the growing popularity of smartphones, shipments of which are projected to increase from 306 million to 1 billion over the next four years....