Pattern Recognition and Automatic Analysis on Moire Photographs of Human Bones

• Published in: Journal of the Anthropological Society of Nippon Vol. 90; no. 2; pp. 161 - 168
• Main Authors: FUJISAKI, Toshihide, TERADA, Harumi, IKEDA, Toshiko
• Format: Journal Article
• Language: English
• Published: The Anthropological Society of Nippon 1982
• ISSN: 0003-5505; 1884-765X
• DOI: 10.1537/ase1911.90.161

This paper describes a technique of computerized data analysis and processing of moiré photographs. The facilities of the processing system consisted of TV-camera, A/D converter, magnetic disks, central processing unit and display apparatuses. The analogue data on moiré photographs were picked up by TV-camera and were converted to digital information by A/D converter. The digitalized data with 1 to 255 grades were binarized by modified Laplacian method, and the unnecessary background area was separated and removed from the data of moiré images proper. The data on all contour fringes were traced and delineated by clock-wise detection of S neighboring picture elements. The z-values for the height of each contour lines were processed by a conversion table. Perspective charts of the patella and calcaneus were represented as an example of output of the automatic processing. The algorism to compute the surface area and volume of the bones was also given.