1. An apparatus for identifying human organs from an input ultrasound image signal, comprising: a first feature vector determiner for determining a first feature vector of the input ultrasound image signal; a memory for storing a list of predetermined types of organs and a plurality of ultrasound images in association with each of the predetermined types of organs; a second feature vector determiner for determining respective second feature vectors of the ultrasound images for each of the predetermined types of organs; a calculator for calculating an average vector and a standard deviation vector of the second feature vectors for each of the predetermined types of organs; and an organ determiner for selecting one of the average vectors for the predetermined types of organs based on the first feature vector and the average vectors and the standard deviation vectors for the predetermined types of organs, and for determining an organ corresponding to the selected average vector as an organ corresponding to the input ultrasound image signal.