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VARIATIONS IN BINOCULAR ACUITY AND THEIR INFLUENCE ON CONTOUR MEASUREMENTS
Author(s) -
Palmer David Alan
Publication year - 1960
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.1960.tb01295.x
Subject(s) - parallax , computer vision , observer (physics) , monocular , artificial intelligence , stereoscopy , stereoscopic acuity , computer science , binocular vision , stereopsis , optometry , physics , medicine , quantum mechanics
Summary Contour measurements by means of stereoscopic vision, as used in photogrammetry, have now become so highly developed that the limit of accuracy is often set by the binocular acuity of the observer. Very small variations in the personal error of the observer can introduce significant inaccuracies in the measurements. A stereoscope capable of measuring binocular parallax to one second of arc was constructed and used to study the possible causes of these personal variations. Analysis of the results suggests that the monocular clue of “overlay” may be one of the main causes of error, the magnitude of the error varying with the definition of the photograph being studied, and with the state of visual fatigue of the observer.