1. A method for imaging a tooth, the method executed at least in part by a computer, comprising: illuminating the tooth and acquiring reflectance image data of the tooth; illuminating the tooth and acquiring fluorescence image data from the tooth; aligning the acquired reflectance and fluorescence image data for the tooth to form aligned reflectance and fluorescence image data; for one or more pixels of the aligned reflectance and fluorescence image data, generating at least one feature vector having data derived from one or both of the aligned reflectance and fluorescence image data; processing the aligned reflectance and fluorescence image data and the at least one feature vector using one or more trained classifiers obtained from a memory that is in signal communication with the computer to generate processed data; and displaying, storing, or transmitting the processed data, where the processing results comprise a likelihood mapping indicative of tooth condition, wherein the processing results further comprise a composite image generated from the likelihood mapping and the acquired reflectance or fluorescence image data.