| 摘要 |
<p>An apparatus for and a method of feature extraction in which are formed feature vectors representing pixels contained in a pattern desired to be recognized, and reference patterns. One part of the feature vector developed is representative of the pixels contained in the pattern itself. Another part of the feature vector, consisting of one or more bytes of the feature vector, defines the aspect ratio of the pattern. Each byte of the feature vector representing the pixels contained in the character can represent the relative ratio of black pixels to total pixels in a specific area of the character; other functions relating input matrix and output feature vector information can be used. The areas of the character which are defined by the feature vector can together cover the entire character, providing a feature vector describing what might loosely be thought of as a "blurred" version of the pattern. </p> |
