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This paper describes various forms of line drawing representation, compares different schemes of quantization, and reviews the manner in which a line drawing can be extracted from a tracing or a photographic image. The subjective aspects of a line drawing are examined. Different encoding schemes are compared, with emphasis on the so-called chain code which is convenient for highly irregular line drawings. The properties of chain-coded line drawings are derived, and algorithms are developed for analyzing line drawings to determine various geometric features. Procedures are described for rotating, expanding, and smoothing line structures, and for establishing the degree of similarity between two contours by a correlation technique. Three applications are described in detail: automatic assembly of jigsaw puzzles, map matching, and optimum two-dimensional template layout. [ABSTRACT FROM AUTHOR]

This article presents information about a research paper "Improvements in or Relating to Encoding Information on Punched Record Cards and Other Equivalent Media," by Calvin Northrup Moores. It describes an encoding scheme which consists in a method of manufacturing a collection of units for use with a mechanical, optical or electrical selecting device each unit having a field for selection-controlling indicia for sensing by the said selecting device according to the pattern inclusion principle. Diagrams at the end of the paper illustrate several selective machines.

The article presents the abstract of the paper titled "La Cybernétique et l'origine de l'information." It describes the main types of information machines, encoding methods, etc. and discusses past and future of cybernetics.

Existing methods of sorting for all compounds containing a specified chemical group, require ad hoc coding of all such groups; the limitations and disadvantages of these methods are briefly discussed. A new and completely general solution is proposed, using no coding other than the Gordon-Kendall-Davison (GKD) ciphers for the compounds. The Electronic Structural Correlator (ESC) which is proposed for this purpose consists of a high-speed, sequence-controlled electronic digital computer coupled to punched card reading and sorting equipment. The logical and computing programmes for ESC are given in sufficient detail that only simple, logical and arithmetic operations are involved. Such a computer is shown to be somewhat smaller than general-purpose computers and the time required to carry out the various operations is discussed. Average sorting times should be comparable with those of simple accounting type sorters. In addition to sorting for groups, ESC could detect cipher errors (and correct seniority errors), automatically expand contracted forms and carry out computations of additive properties. [ABSTRACT FROM AUTHOR]