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    Security camera and motion detecting method for security camera
    1.
    发明授权
    Security camera and motion detecting method for security camera 有权

    公开(公告)号：US11893753B2

    公开(公告)日：2024-02-06

    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

    IPC: G06T7/20 ,  H04N7/18 ,  G06T7/254 ,  G06T7/246

    CPC classification number: G06T7/254 ,  G06T7/248 ,  H04N7/18

    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.

    Computer readable recording medium which can perform image pattern determining method
    2.
    发明授权
    Computer readable recording medium which can perform image pattern determining method 有权

    公开(公告)号：US11869226B2

    公开(公告)日：2024-01-09

    申请号：US17079512

    申请日：2020-10-25

    Applicant: PixArt Imaging Inc.

    Inventor： Joon Chok Lee

    IPC: G06V10/50 ,  G06V10/44

    CPC classification number: G06V10/50 ,  G06V10/443

    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.

    Object detection method and camera apparatus
    3.
    发明授权
    Object detection method and camera apparatus 有权

    公开(公告)号：US11941886B2

    公开(公告)日：2024-03-26

    申请号：US17385957

    申请日：2021-07-27

    Applicant: PixArt Imaging Inc.

    Inventor： Kevin Len-Li Lim ,  Joon Chok Lee

    IPC: G06V10/50 ,  G06V10/60 ,  G06V10/75 ,  G06V20/52

    CPC classification number: G06V20/52 ,  G06V10/50 ,  G06V10/60 ,  G06V10/758

    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.

    Connected component analysis method which can reuse label
    4.
    发明授权
    Connected component analysis method which can reuse label 有权

    公开(公告)号：US12175722B2

    公开(公告)日：2024-12-24

    申请号：US17553833

    申请日：2021-12-17

    Applicant: PixArt Imaging Inc.

    Inventor： Joon Chok Lee ,  Zi Hao Tan

    IPC: G06V10/44 ,  G06T7/11

    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.

    POINTING METHOD AND POINTING DEVICE
    5.
    发明申请
    POINTING METHOD AND POINTING DEVICE 有权

    公开(公告)号：US20240411382A1

    公开(公告)日：2024-12-12

    申请号：US18207691

    申请日：2023-06-09

    Applicant: PixArt Imaging Inc.

    Inventor： Zi Hao Tan ,  Joon Chok Lee ,  Kevin Len-Li Lim

    IPC: G06F3/03

    Abstract: A pointing method, applied to a pointing device comprising a processing circuit, comprising: (a) receiving input delta by the processing circuit, wherein the input delta indicates supposed movement of the pointing device; (b) adjusting the input delta to generate output delta by the processing circuit, wherein the input delta has a first magnitude and the output delta has a second magnitude, wherein the second magnitude is smaller than or equal to the first magnitude; and (c) output the output delta by the processing circuit.

    Dynamic scale for mouse sensor runaway detection
    9.
    发明授权
    Dynamic scale for mouse sensor runaway detection 有权
    动态规模的鼠标传感器失控检测

    公开(公告)号：US09141204B2

    公开(公告)日：2015-09-22

    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。

    Pointing method and pointing device
    10.
    发明授权
    Pointing method and pointing device 有权

    公开(公告)号：US12236019B2

    公开(公告)日：2025-02-25

    申请号：US18207691

    申请日：2023-06-09

    Applicant: PixArt Imaging Inc.

    Inventor： Zi Hao Tan ,  Joon Chok Lee ,  Kevin Len-Li Lim

    IPC: G06F3/0354 ,  G06F3/03 ,  G06F3/038 ,  G06F3/041

    Abstract: A pointing method, applied to a pointing device comprising a processing circuit, comprising: (a) receiving input delta by the processing circuit, wherein the input delta indicates supposed movement of the pointing device; (b) adjusting the input delta to generate output delta by the processing circuit, wherein the input delta has a first magnitude and the output delta has a second magnitude, wherein the second magnitude is smaller than or equal to the first magnitude; and (c) output the output delta by the processing circuit.

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