1. A machine vision apparatus, comprising: a robotic handler adapted to rotate an object comprising a test tube; an imager positioned to capture a plurality of images of said test tube as said test tube is being rotated by said handler; a microcontroller associated with said imager, wherein said microcontroller is programmed to form a single panoramic image of said object from said plurality of images and then extract information about said test tube from said single panoramic image comprising the level of liquid in said test tube.