OBJECT DETECTION METHOD AND CALIBRATION APPARATUS OF OPTICAL TOUCH SYSTEM
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United States of America Patent
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Sep 10, 2015
app pub date -
Feb 6, 2015
filing date -
Mar 5, 2014
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Abstract
The present disclosure provides an object detection method including: pre-storing a lookup table of touch reference values, wherein the lookup table of touch reference values records a plurality of touch reference values associated with image positions of a plurality of calibration object images formed in calibration images captured by a first image sensor; capturing a first image, wherein the first image has at least an object image corresponding to a pointer formed therein; generating a first light distribution curve according to the first image; defining a first detection region in the first light distribution curve; obtaining at least one touch reference value associated with the object image using the lookup table of touch reference values; comparing at least one brightness value within the first detection region of the first light distribution curve with the at least one touch reference value obtained.
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