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公开(公告)号：US09933863B2
公开(公告)日：2018-04-03
申请号：US13905672
申请日：2013-05-30
Applicant: PIXART IMAGING INC.
Inventor： Chia-Cheun Liang , Yi-Hsien Ko , Han-Ping Cheng
CPC classification number: G06F3/033 , G06F3/0325
Abstract: An optical object recognition system includes at least two beacons, an image sensor and a processing unit. The beacons operate in an emission pattern and the emission pattern of the beacons has a phase shift from each other. The image sensor captures image frames with a sampling period. The processing unit is configured to recognize different beacons according to the phase shift of the emission pattern in the image frames.
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公开(公告)号：US09599988B2
公开(公告)日：2017-03-21
申请号：US14450377
申请日：2014-08-04
Applicant: PIXART IMAGING INC.
Inventor： Chia-Cheun Liang , Ming-Tsan Kao , Yi-Hsien Ko , Hsin-Chia Chen
CPC classification number: G05D1/0246
Abstract: There is provided a mobile carrier and an auto following system using the mobile carrier. The mobile carrier is capable of capturing at least an image of a guiding light source and automatically following the guiding light source based on the captured image of the guiding light source. The mobile carrier is further disposed with a mobile light source for a remote image sensing device to capture an image of the mobile light source while the mobile carrier cannot capture the image of the guiding light source, so that the mobile carrier can be guided by a control signal provided according to the captured image of the mobile light source.
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公开(公告)号：US20150161448A1
公开(公告)日：2015-06-11
申请号：US14225444
申请日：2014-03-26
Applicant: PixArt Imaging Inc.
Inventor： Chia-Cheun Liang
CPC classification number: H04N5/4403 , G06F3/017 , G06F3/0304 , G06K9/2027 , G06K2009/3291 , H04N5/232 , H04N5/23229 , H04N21/42204
Abstract: An optical tracking method disclosed in the present invention includes obtaining a continuous image set containing a reference light source during a period, and identifying an image characteristic variation of the continuous image set. The reference light source is set at a constant illuminated mode, and generates a known illumination variation during the period. The optical tracking method further includes comparing the image characteristic variation with the known illumination variation to determine whether a predetermined function is actuated. The predetermined function calculates position information of the reference light source on an image of the continuous image set.
Abstract translation: 本发明公开的光学跟踪方法包括在一段时间内获得包含参考光源的连续图像组，并且识别连续图像组的图像特征变化。 参考光源被设置在恒定的照明模式，并且在该周期期间产生已知的照明变化。 光学跟踪方法还包括将图像特性变化与已知照明变化进行比较，以确定是否启动预定功能。 该预定功能计算出连续图像组的图像上的参考光源的位置信息。
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