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公开(公告)号：US20240020850A1
公开(公告)日：2024-01-18
申请号：US17865405
申请日：2022-07-15
Applicant: PixArt Imaging Inc.
Inventor： Joon Chok LEE , Kevin Len-Li LIM
CPC classification number: G06T7/20 , G06T7/13 , G06V10/751 , G08B29/185
Abstract: A method of identifying a false alarm of an optical motion sensor including a plurality of pixel units, includes: receiving pixel values of a testing set of pixel units selected from the plurality of pixel units, and a number of pixels of the testing set is smaller than a number of the plurality of pixel units; and performing a background adjustment operation according to the pixel values of the testing set of pixel units.
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公开(公告)号：US20220239868A1
公开(公告)日：2022-07-28
申请号：US17719364
申请日：2022-04-12
Applicant: PixArt Imaging Inc.
Inventor： Joon Chok LEE , Kevin Len-Li LIM , Wen-Han Yao
Abstract: A method of an optical sensor device includes: automatically entering a calibration mode to automatically define a region of interest as a masking region; and, selectively ignoring a motion detected within the masking region when the optical sensor device is in a normal operation mode.
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公开(公告)号：US20220179086A1
公开(公告)日：2022-06-09
申请号：US17110315
申请日：2020-12-03
Applicant: PixArt Imaging Inc.
Inventor： Zi Hao TAN , Joon Chok LEE , KEEN-HUN LEONG , Sai Mun LEE
IPC: G01S17/894 , G01S7/4865 , G01S7/4861
Abstract: An optical sensing system comprising: a processing circuit; an optical sensor, configured to sense first optical data respectively in first sensing time intervals; and a TOF (Time of Flight) optical sensor, configured to sense second optical data respectively in second sensing time intervals. The processing circuit computes a distance between a first object and the optical sensing system according to the second optical data. The first sensing time intervals do not overlap with the second sensing time intervals.
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公开(公告)号：US20230196717A1
公开(公告)日：2023-06-22
申请号：US17553833
申请日：2021-12-17
Applicant: PixArt Imaging Inc.
Inventor： Joon Chok LEE , Zi Hao TAN
CPC classification number: G06V10/457 , H04N5/23229
Abstract: A connected component analysis (CCA) method, which can use labels repeatedly, comprising: defining a label pattern comprising a label and a plurality of neighboring labels; setting a center label of a current pixel of a target binary image according to a binary value of the current pixel and the neighboring pixels; setting at least two of the neighboring labels according to whether the current pixel is in any one of a first row, a first column and a last column; and recording the center label to a label buffer. Labels for marking pixels of the target binary image are first center labels, and then are second center labels, and are the first center labels again after the labels are the second center labels.
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Patent Agency Ranking
公开(公告)号：US20210065385A1
公开(公告)日：2021-03-04
申请号：US16937612
申请日：2020-07-24
Applicant: PixArt Imaging Inc.
Inventor： Kevin Len-Li LIM , Joon Chok LEE , Zi Hao TAN , Ching Geak CHAN , KEEN-HUN LEONG
Abstract: A security camera with a motion detection function, which comprises: an image sensor, configured to capture original images; a variation level computation circuit, configured to compute image variation levels of the original images; a long term computation circuit, configured to calculate a first average level for the image variation levels corresponding to M of the original images; a short term computation circuit, configured to calculate a second average level for the image variation levels corresponding to N of the original images, wherein M>N; and a motion determining circuit, configured to determine whether a motion of an object appears in a detection range of the image sensor according to a relation between the first average level and the second average level. By such security camera, the interference caused by noise or small object can be avoided. Accordingly, the motion detection of the security camera can be more accurate.
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公开(公告)号：US20230030415A1
公开(公告)日：2023-02-02
申请号：US17385957
申请日：2021-07-27
Applicant: PixArt Imaging Inc.
Inventor： Kevin Len-Li LIM , Joon Chok LEE
Abstract: An object detection method of effectively increasing identification accuracy is applied to a camera apparatus and includes acquiring a reference image and a second reference image containing a specific surveillance area respectively via a first exposure parameter and a second exposure parameter greater than the first exposure parameter, utilizing the first exposure parameter and the second exposure parameter to respectively capture a first detection image and a second detection image during an object detection period, computing a first pixel value variation between the first reference image and the first detection image and a second pixel value variation between the second reference image and the second detection image, and comparing the first pixel value variation with the second pixel value variation to determine whether a target object is within the specific surveillance area.
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公开(公告)号：US20220129692A1
公开(公告)日：2022-04-28
申请号：US17079512
申请日：2020-10-25
Applicant: PixArt Imaging Inc.
Inventor： Joon Chok LEE
IPC: G06K9/46
Abstract: A computer readable recording medium storing at least one program, wherein an image pattern determining method for determining a stripe image can be performed when the program is executed. The image pattern determining method comprises: (a) classifying a single target image to a plurality of image blocks, wherein each of the image blocks comprises at least one pixel; (b) calculating pixel differences between pixel value sums of at least one of the image blocks and neighboring image blocks of the image block; (c) calculating image variation levels of each of the image blocks in a plurality of directions according to the pixel differences; and (d) determining whether the single target image comprises the strip image or not according to the image variation levels. An image pattern determining method for determining a check board image is also disclosed.
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公开(公告)号：US20210104051A1
公开(公告)日：2021-04-08
申请号：US16592718
申请日：2019-10-03
Applicant: PixArt Imaging Inc.
Inventor： KEEN-HUN LEONG , Joon Chok LEE , Yueh Mei Kim
Abstract: A marker detecting device comprising: an image sensor, comprising a plurality of difference sensing regions; and a processing circuit, configured to determine a marker exists when a first difference of pixel value data of images captured by different ones of the difference sensing regions is larger than a marker difference threshold and to determine the marker does not exist when the first difference is smaller than the marker difference threshold.
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公开(公告)号：US20150234483A1
公开(公告)日：2015-08-20
申请号：US14182293
申请日：2014-02-18
Applicant: PixArt Imaging Inc.
Inventor： Joon Chok LEE , Zi Hao TAN
IPC: G06F3/0354 , G06F3/03
CPC classification number: G06F3/03543 , G06F3/0317 , G06F3/038
Abstract: A method for dynamically setting a scale for performing a cross-correlation check between a reference image and a comparison image of a mouse includes: setting a plurality of scale sizes for a cross-correlation check; providing a look up table (LUT) mapping the plurality of scale sizes to a plurality of overlapped areas of the reference image and comparison image and a plurality of predicted locations for the cross-correlation; determining a velocity of motion of the mouse, and using the determined velocity to generate a predicted location; inputting the predicted location to the LUT and mapping to a scale size; and performing the cross-correlation check according to the scale size.
Abstract translation: 一种用于动态地设置用于执行参考图像和鼠标的比较图像之间的互相关检查的比例的方法包括：设置用于互相关检查的多个比例尺度; 提供将多个尺度尺寸映射到参考图像和比较图像的多个重叠区域的查找表（LUT）和用于互相关的多个预测位置; 确定鼠标的运动速度，并使用所确定的速度来产生预测位置; 将预测位置输入到LUT并映射到刻度尺寸; 并根据比例尺度执行互相关检查。
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