Abstract: Pattern segmentation and recognition in which hand-written characters are transformed electrically into 2-dimensional image patterns, wherein if ambiguity exists in segmenting a unit pattern including a character from the image patterns, character recognition is not made compulsively, but a plurality of possible unit patterns are first established. Then, the various unit patterns are segmented, and each unit pattern is identified to be a partial pattern, linked patterns, etc., so that each character is recognized on a basis of total judgement, whereby ambiguity of segmentation is resolved.

Abstract: A multi-layer extrusion die wherein a temperature control mechanism for heating or cooling an inner layer resin is provided inside an inner layer resin flow path, and resins flowing through respective resin flow paths are each heated to a suitable temperature so as to eliminate possibilities of occurrence of burning of the resin and the like.

Abstract: A digitized multilevel signal is encoded on the basis of unit combinations each including a run-length bit field indicative of run-length at each of the signal levels and a single continuation bit indicative of transition of the signal levels. The encoding is so modified that a virtual run of zero length is inserted when the transition of the signal levels at adjacent sampling points departs from a predetermined order. Polarity of the continuation bit is inverted upon every transition of the signal level.