Method for calculating a scale relationship for an imaging system
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United States of America Patent
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Sep 28, 2004
Grant Date -
N/A
app pub date -
Nov 29, 2001
filing date -
Nov 29, 2001
priority date (Note) -
Expired
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Abstract
The disclosed methods and apparatuses leverage a known value of a characteristic of an object to partially calibrate an imaging system 'on-the-fly', and minimize, if not eliminate, the need for a separate calibration image(s). Specifically, the scale relationship (i.e. the relationship between physical dimensions and image dimensions) is calculated using the known value and a measured value of the characteristic from the image. The same image used to calculate the scale relationship is also processed, such as inspected, for example. The known value can be a measurement of an aspect of many things, including an inherent feature, or a relationship between features, for example. One embodiment uses a model to find the characteristic. A described preferred embodiment inspects an end-face of a fiber-optic cable, wherein the known value is the diameter of an annular cladding of the fiber-optic cable.
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