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
Williams syndrome new patients with the same presentation. This led to the syndrome's full original name of Williams-Beuren syndrome, which is still used in some medical publications. From 1964 to 1975, small research reports broadened medical knowledge of this syndrome's cardiovascular problems. Then in 1975, K. Jones and D. Smith conducted a large-scale report on numerous patients with Williams syndrome, ranging in age from infancy to adulthood, and described the behavioral and observable physical symptoms in greater detail than previously recorded. The adjective "elfin" may have originated to describe the facial features of people with Williams syndrome; before Williams syndrome's scientific cause