IMAGE CALIBRATION INSPECTION TOOL AND ENDOSCOPE SYSTEM
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United States of America Patent
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Sep 13, 2017
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Sep 25, 2015
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Abstract
An image calibration inspection tool includes: a plurality of substantially rectangular markers, two orthogonal sides of which are connected by an arc-shaped curve; and a calibration chart in which the plurality of markers are formed on a metal plate through machining, laser marking, or the like, wherein two of the markers in a diagonal direction are separated by a predetermined distance.
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