1. A computer-implemented method for identifying a pharmaceutical composition, the method comprising: accessing at least one image of the pharmaceutical composition, wherein each image comprises a distinct image of the pharmaceutical composition; extracting features from each image of the pharmaceutical composition, the features including a rotationally-independent measure of surface features of the pharmaceutical composition in the image; generating a feature vector associated with each image of the pharmaceutical composition that includes the features extracted for that image; applying at least one classifier to each of the feature vectors to determine at least one classification associated with each image; and determining a pill identification by accumulating the at least one classification for each image.