1. A method for determining a volume of an object in an image captured by a camera of a wireless cellular device, the method comprising: using an illuminator of a wireless cellular device to project a pattern of structured light having known spatial characteristics onto an object for which a volume is intended to be estimated; capturing an image, using a camera of said wireless cellular device, of said object while said object is illuminated by said pattern of structured light, a spatial distortion being introduced by a reflection of said pattern off a surface of said object; processing said image to generate a depth map; estimating a camera pose relative to a surface on which said object lies; and estimating a volume of said object from said depth map and said estimated camera pose.