Facial recognition system introduced varying technologies to the procedure. Some of the most notable include the following techniques: Some face recognition algorithms identify facial features by extracting landmarks, or features, from an image of the subject's face. For example, an algorithm may analyze the relative position, size, and/or shape of the eyes, nose, cheekbones, and jaw. These features are then used to search for other images with matching features. Other algorithms normalize a gallery of face images and then compress the face data, only saving the data in the image that is useful for face recognition. A probe image is then compared with
Immunodeficiency–centromeric instability–facial anomalies syndrome Immunodeficiency–centromeric instability–facial anomalies syndrome ICF syndrome (or Immunodeficiency, Centromere instability and Facial anomalies syndrome) is a very rare autosomal recessive immune disorder. It is characterized by variable reductions in serum immunoglobulin levels which cause most ICF patients to succumb to infectious diseases before adulthood. ICF syndrome patients exhibit facial anomalies which include hypertelorism, low-set ears, epicanthal folds and macroglossia. ICF syndrome can be caused by a mutation in the DNA-methyltransferase-3b ("Dnmt3b") gene, located on chromosome 20q11.2. The disease is inherited in an autosomal recessive manner. For ICF patients the most diffused therapy consists of repeated intravenous infusions of immunoglobulins for