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A microcomputer‐based system for stereogrammetric analysis
Author(s) -
Roberts S. G.,
Page T. F.
Publication year - 1981
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1981.tb01307.x
Subject(s) - plotter , parallax , computer vision , microcomputer , artificial intelligence , computer graphics (images) , computer science , projection (relational algebra) , line (geometry) , tilt (camera) , plane (geometry) , point (geometry) , mathematics , geometry , algorithm , telecommunications , chip
SUMMARY A system for the quantitative analysis of stereo‐pairs of photomicrographs has been devised using a Commodore ‘PET’ microcomputer coupled to a digitizing pad, plotter and printer. The system need not use any form of stereo‐viewer and does not require any particular alignment of the photographs. Height differences, derived from parallax measurements, can be obtained quickly even by operators who might normally experience difficulties with stereoscope‐based systems due to either poor stereo vision or inexperience. Three‐dimensional coordinates, input from point‐pairs, are stored inside the computer and may be sorted to draw line profiles along any operator‐selected line. Such profiles may be referred to either the projection of the median plane of the two images or rotated (‘levelled’) to the 0° tilt plane. The operation of the system is described and illustrated using both specially‐constructed left‐ and right‐hand ‘images’ from test contours and also real SEM stereo pairs. Finally, both the potential and limitations of such a system for development and application are discussed.