as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
generate an algorithm for facial recognition.
user
def facialrecognition(img): 
    # perform face detection 
    faces = detectfaces(img) 

    # for each face in the image
    for face in faces: 
        # extract facial features
        features = extractfeatures(face)

        # compare facial features to a database of known facial features
        matches = comparefeatures(features)

        # identify the closest matching face
        identifiedface = identify(matches)

        # return the identified face
        return identifiedface
assistant