1. A method for constructing a unified image of biometric data, comprising: receiving a sequence of images of biometric data; selecting a set of images of biometric data from the sequence of images of biometric data, wherein the set of images includes one or more segments of at least one image in the sequence of images; selecting one or more portions of at least one image of biometric data in the set of images to be included in the unified image of biometric data; and constructing the unified image of biometric data using the one or more portions of the at least one image of biometric data.