Pixart Imaging Incorporated

Primesensor Technology Inc.

Wen-Han Yao

Chih-Huan Wu

Wen-Cheng Yen

Ming-Tsan Kao

Ren-Hau Gu

Yi-Hsien Ko

Yu-Hao Huang

Shu-Sian Yang

Yen-Min Chang

Hsin-Chia Chen

Chi-Chieh Liao

Chih-Hung Lu

Ching-Lin Chung

Chih-Hsin Lin

Kevin Len-Li Lim

Tzung-Min Su

Yi-Fang Lee

Han-Chang Lin

Tsung-Fa Wang

Yung-Chang Lin

Joon Chok Lee

Chuan-Hsin Lee

Wei-Ting Chan

Yi-hsien Ko

Teo-Chin Chiang

Hsueh-Te Chao

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.

Motion detection methods and image sensor devices capable of generating ranking list of regions of interest and pre-recording monitoring images

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.

Image sensing scheme capable of saving more power as well as avoiding image lost and also simplifying complex image recursive calculation

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.

Optical sensor device and calibration method capable of avoiding false motion alarm

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.

Barcode detection device with width calibration

There is provided a barcode detection device including an image sensor and a processor. The image sensor captures an image frame of a color barcode. The processor sequentially processes every row of the image frame to find at least one color segment in each row of the image frame, categorizes color segments of a same color in one cluster according to a position relationship and a color similarity of the color segments in the image frame, and recognize a color of the pixels in one cluster according to color parameters of pixels in said one cluster.

Color recognition method and barcode detection device using the same

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.

Optical sensor devices and method capable of calibrating clock signal by itself when receiving one or more transmissions of specific communication signal from monitoring system

There is provided an imaging system including a camera and a control host. The camera identifies ambient light intensity and performs trigger event detection in a low power mode. When the camera detects a trigger event in the low power mode, the control host is woken up. The camera also determines an exposure mode according the ambient light intensity and informs the exposure mode to the control host such that an operating mode of the control host after being woken up matches the exposure mode of the camera.

Camera having two exposure modes and imaging system using the same

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.

Pixel circuit and pixel array outputting over exposure information, and operating method of pixel array

Barcode detection device with rotation angle detection

There is provided an image sensor for exposing a plurality of pixel rows within a frame period using a rolling shutter. The image sensor includes a processor for calculating bright-dark distribution patterns of image frames. The processor further adjusts the frame period to be substantially identical to a predetermined period by changing a total number of exposed line times within the frame period when a difference between the bright-dark distribution patterns of two image frames is larger than a predetermined threshold.

Image sensor capable of detecting rolling flicker and adjusting frame rate

There is provided a barcode detection device including an image sensor and a processor. The image sensor captures an image frame of a color barcode. The processor sequentially processes every row of the image frame to find at least one color segment in each row of the image frame, categorizes color segments of a same color in one cluster according to a position relationship and a color similarity of the color segments in the image frame, and averages color parameters of pixels in one cluster to accordingly recognize a color of the pixels in said one cluster.

Pixel circuit outputting over exposure information and method of calculating real intensity thereof, pixel array having the same

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 RIOs.

Growing community of inventors

Hsinchu County, Taiwan

Wen-Han Yao