Showing papers on "Line segment published in 1969"

Visual Feature Extraction by a Multilayered Network of Analog Threshold Elements

Abstract: A new type of visual feature extracting network has been synthesized, and the response of the network has been simulated on a digital computer. This research has been done as a first step towards the realization of a recognizer of handwritten characters. The design of the network was suggested by biological systems, especially, the visual systems of cat and monkey. The network is composed of analog threshold elements connected in layers. Each analog threshold element receives inputs from a large number of elements in the neighbouring layers and performs its own special functions. It takes care of one restricted part of the photoreceptor layer, on which an input pattem is presented, and it responds to one particular feature of the input pattem, such as brightness contrast, a dot in the pattern, a line segment of a particular orientation, or an end of the line. This means that the network performs parallel processing of the information. With the propagation of the information through the layered network, the input pattern is successively decomposed into dots, groups of line segments of the same orientation, and the ends of these line segments.

Systems and apparatus for character recognition

Abstract: System and apparatus for recognizing both handwritten and machine-printed character patterns in which the character filed is scanned by photoelectric means to generate an analog-form signal which is converted into a four-bit binary form and fed to a four-bit parallel shift register from which differently delayed versions are taken to summing circuits in the development of ntuples which operate to detect the presence of short line segments of specific orientation within the character area. By means of further summing circuits the line segment responses are analyzed to identify and indicate the position of a number of different topographical features such as line endings, bends or corners, line junctions and line crossings. These feature responses are converted into a list of code signals for matching, as by computer, with standard lists of similar code signals derived from ranges of different standard characters.

Pattern recognizing circuit

Abstract: A position sector determining circuit of a pattern recognizing circuit is connected to pattern scanning apparatus and determines the distance between a side of a polygon forming a polygonal area enclosing the pattern and an edge of a line segment of the pattern closest the side.