1. A digital image acquisition device, comprising a lens, an image sensor, a processor, and a processor-readable memory having digital code embedded therein for programming the processor to perform a method of detecting and recognizing faces in digital images acquired by the device, wherein the method comprises: acquiring, from an image stream, an image including one or more face regions; calculating an integral image for at least a portion of the image or a sub-sampled version of the at least a portion of the image, or both; applying a face detection to at least a portion of the integral image to provide one or more candidate face regions; applying a face recognition, which uses a database, to the one or more candidate face regions to recognize a face in the one or more candidate face regions, and determining an identifier for the recognized face; storing the identifier for the recognized face in association with the image or a portion thereof that includes the recognized face; and adjusting one or more image acquisition conditions in an image acquiring device to modify white balance, color balance, focus, or exposure, or combinations thereof, for the recognized face.