公开(公告)号：US11829836B2

公开(公告)日：2023-11-28

申请号：US17951232

申请日：2022-09-23

Applicant: PIXART IMAGING INC.

Inventor： Wen-Han Yao

IPC: G06K7/14 ,  G06K19/06

CPC classification number: G06K7/1456 ,  G06K7/1417 ,  G06K19/06028 ,  G06K19/06131

Abstract: There is provided a barcode detection device including an image sensor and a processor. The image sensor captures an image frame of a barcode. The processor calculates a gradient vector of bars of the barcode in the image frame for determining a rotation angle of the image sensor. The rotation angle is used to calibrate a detected bar width.

公开(公告)号：US11595611B2

公开(公告)日：2023-02-28

申请号：US17844266

申请日：2022-06-20

Applicant: PixArt Imaging Inc.

Inventor： Wen-Han Yao

IPC: H04N5/378 ,  H01L27/146 ,  H04N5/235 ,  H04N5/376 ,  H01L27/148

Abstract: There is provided a pixel circuit including a first circuit and a second circuit. The first circuit is used to output a first voltage associated with exposure intensity. The second circuit is used to output a second voltage associated with exposure time interval. The processor multiples the first voltage to a ratio between a reference voltage and the second voltage to obtain an actual light intensity, wherein the reference voltage is a voltage value outputted by the second circuit of a dummy pixel.

公开(公告)号：US20210344881A1

公开(公告)日：2021-11-04

申请号：US17376127

申请日：2021-07-14

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao

IPC: H04N7/18 ,  G08B13/196 ,  G06T7/246

Abstract: A method of an image sensor circuit includes: providing an event camera comprising at least one pixel unit; using the event camera to sense at least one current pixel value of the at least one pixel unit to detect whether at least one pixel value changes; when the at least one pixel value changes, using the event camera to trigger the digital processing circuit when the digital processing circuit is in a power saving mode and transmit information of the at least one pixel value to the digital processing circuit.

公开(公告)号：US20210144343A1

公开(公告)日：2021-05-13

申请号：US17151625

申请日：2021-01-18

Applicant: PixArt Imaging Inc.

Inventor： Wen-Cheng Yen ,  Wen-Han Yao

IPC: H04N7/18 ,  G08B13/196 ,  G06T7/246

Abstract: A smart motion detection device with a determining method includes a memory, a processor, and a sensor array coupled to the memory and the processor. An image captured by the sensor array is processed by the processor. The sensor array is adapted to pre-store the image into the memory when the processor is operated in the sleep mode, and the pre-stored image is transmitted to the processor when the processor is operated in the wakeup mode. The sensor array includes a comparator adapted to generate an alarm signal for switching the processor from the sleep mode to the wakeup mode in accordance with a comparison result of the pre-stored image. The determining method includes the processor analyzing images captured by the sensor array when the sensor array is activated to capture the images, and the processor analyzing images pre-stored inside the memory when the sensor array is not activated.

公开(公告)号：US20240096135A1

公开(公告)日：2024-03-21

申请号：US18522295

申请日：2023-11-29

Applicant: PixArt Imaging Inc.

Inventor： CHIH-HUAN WU ,  Wen-Han Yao ,  Yl-Hsien Ko

IPC: G06V40/20 ,  G06V10/94 ,  H04N25/75

CPC classification number: G06V40/20 ,  G06V10/94 ,  H04N25/75

Abstract: There is provided a locker with a motion sensor. The motion sensor identifies whether an object is put into or taken out from the locker by calculating coordinates of the object using a motion detection algorithm, by calculating a moving vector of the object using an image time differential algorithm or by comparing a current image frame and a background image frame, and outputs a put-in signal and a taken-out signal to a post control system.

公开(公告)号：US20230299937A1

公开(公告)日：2023-09-21

申请号：US17695803

申请日：2022-03-15

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao ,  Ren-Hau Gu

IPC: H04L7/00 ,  H04L67/141 ,  H04L67/12

CPC classification number: H04L7/0075 ,  H04L67/141 ,  H04L67/12

Abstract: A method of an optical sensor device includes: using an oscillator circuit to generate a clock signal; and generating monitoring frames according to the clock signal; wherein the clock signal is calibrated in response to at least one of: a first communication signal, transmitted for multiple times from a monitoring system externally coupled to the optical sensor device, is received by the optical sensor device; a data length of the first communication signal transmitted for only one time from the monitoring system externally coupled to the optical sensor device; and, a data length of an encoded data portion of the first communication signal transmitted for only one time.

公开(公告)号：US11544489B2

公开(公告)日：2023-01-03

申请号：US17333197

申请日：2021-05-28

Applicant: PIXART IMAGING INC.

Inventor： Wen-Han Yao

IPC: G06K7/14 ,  G06K19/06

Abstract: There is provided a barcode detection device including an image sensor and a processor. The image sensor captures an image frame of a barcode. The processor calculates a gradient vector of bars of the barcode in the image frame for determining a rotation angle of the image sensor. The rotation angle is used to calibrate a detected bar width.

公开(公告)号：US11336869B2

公开(公告)日：2022-05-17

申请号：US17010793

申请日：2020-09-02

Applicant: PixArt Imaging Inc.

Inventor： Wen-Han Yao ,  Chih-Huan Wu

IPC: H04N7/18 ,  G06T7/246 ,  G06T7/00 ,  G06T7/80 ,  H04N5/235

Abstract: A motion detection method utilized for a motion sensor includes: capturing a monitoring image; entering a recording mode when one intensity change value between the monitoring image and a pre-stored background image is higher than a first threshold and a trigger signal is received from an auxiliary sensor; and entering the recording mode when the intensity change value is higher than a second threshold before the trigger signal is received; wherein the second threshold is higher than the first threshold.

公开(公告)号：US10944941B2

公开(公告)日：2021-03-09

申请号：US16833677

申请日：2020-03-30

Applicant: PixArt Imaging Inc.

Inventor： Wen-Cheng Yen ,  Wen-Han Yao

IPC: H04N7/18 ,  G08B13/196 ,  G06T7/246

Abstract: A smart motion detection device with a determining method includes a memory, a processor, and a sensor array coupled to the memory and the processor. An image captured by the sensor array is processed by the processor. The sensor array is adapted to pre-store the image into the memory when the processor is operated in the sleep mode, and the pre-stored image is transmitted to the processor when the processor is operated in the wakeup mode. The sensor array includes a comparator adapted to generate an alarm signal for switching the processor from the sleep mode to the wakeup mode in accordance with a comparison result of the pre-stored image. The determining method includes the processor analyzing images captured by the sensor array when the sensor array is activated to capture the images, and the processor analyzing images pre-stored inside the memory when the sensor array is not activated.

公开(公告)号：US20240073359A1

公开(公告)日：2024-02-29

申请号：US18504182

申请日：2023-11-08

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Yi-Hsien Ko ,  Wen-Han Yao

IPC: H04N5/77 ,  G11B27/34

CPC classification number: H04N5/772 ,  G11B27/34 ,  H04N23/73

Abstract: A motion detection method applied into an image sensor device includes: providing a plurality of regions of interest (ROIs) on at least one monitoring image; for each region of interest (ROI): detecting whether at least one motion event occurs within the each ROI; and determining a priority level of the each ROI according to at least one feature information of the at least one motion event; and determining an alarm schedule of the ROIs for a user according to a plurality of priority levels of the ROIs.