1. A method for facilitating design of a hierarchy of features while recognizing one or more characters in a video, the method being performed by a processor using programmed instructions stored in a memory, the method comprising: collecting one or more features from each of the segments in a video frame, the video frame having been extracted from the video and divided into multiple segments; preparing, using the one or more features, multi-dimensional feature vectors to classify the one or more characters; calculating a minimum distance between the multi-dimensional features vectors of a test character and the multi-dimensional feature vectors of a pre-stored character template, wherein the test character is the character to be classified and is present in the video frame, and wherein the minimum distance is a distance representing a closeness between the characters; selecting, with respect to a decreasing order of the minimum distance, the multi-dimensional feature vectors to design a hierarchy of the multi-dimensional feature vectors; and classifying the one or more characters based on the hierarchy of the multi-dimensional feature vectors.