Accession Number:

AD0600276

Title:

A STUDY OF THE CHAIN-DIFFERENCE CORRELATION TECHNIQUE FOR CONTOUR LINE PATTERNS.

Descriptive Note:

Technical note,

Corporate Author:

NEW YORK UNIV N Y LAB FOR ELECTROSCIENCE RESEARCH

Personal Author(s):

• Socci,E. B.

Report Date:

1964-03-01

Pagination or Media Count:

59.0

Abstract:

A correlation technique for contour-line patterns which is invariant to rotation is described. The technique is based on the so-called chain-encoding method for contour-line data, in which a given contour is represented by a chain of elements that in sequence trace out the contour path. The correlation technique permits a comparison between two contours without regard to relative orientation or scale. It is based directly on the intrinsic curvature properties of contour-line patterns. An algorithm for forming correlation sequences is developed and programmed for a digital computer. Results obtained by correlating some sample contours are discussed. Author

Descriptors:

• *CORRELATION TECHNIQUES
• PATTERN RECOGNITION
• DIGITAL COMPUTERS
• GRAPHICS
• CURVE FITTING
• GEOMETRIC FORMS
• PROCESSING
• COMPUTER PROGRAMMING

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE