Pixart Imaging Incorporated

Avago Technologies Ecbu IP (singapore) Pte. Ltd.

Pixart Imaging (penang) Sdn. Bhd.

Avago Technologies General IP (singapore) Pte. Ltd.

Zi Hao Tan

Joon Chok Lee

Willie Song

Kevin Len-Li Lim

Keen-Hun Leong

Shan Chong Tan

Edward Kah Ching Teoh

Sai Mun Lee

Beng Chye Lye

Ching Geak Chan

Mark Ging Yeon Wong

Siew Fong Ng

An image sensing system control method, comprising: (a) defining a first reporting frame sensed at a first reporting frame time, and a second reporting frame sensed at a second reporting; (b) acquiring a first motion of the image sensing system for a first latency time interval between a first polling time and the first reporting frame time; (c) computing a second motion of the image sensing system for a first calibration time interval by the image sensor, wherein the first calibration time interval comprises a first frame time interval between the first, the second reporting frame times, and comprises a first expected latency time interval after the second reporting frame time; and (d) outputting a first output motion to the control circuit by the image sensor, thereby a difference between the first output motion and a physical movement of the image sensing system is smaller than a predetermined value.

Image sensing system control method and image sensing system

An image sensing system control method, applied to an image sensing system comprising an image sensor and a control circuit. The method comprises: (a) defining a first reporting frame sensed at a first reporting frame time and a second reporting frame sensed at a second reporting frame time, wherein the image sensor reports motions computed according to the first reporting frame after the first reporting frame time, and reports motions computed according to the second reporting frame after the second reporting frame time; and (b) adjusting a first reporting time interval between the first reporting frame time and the second reporting frame time, to adjust the second reporting frame time to meet a second target time. The second reporting frame time is after the first reporting frame time.

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.

Pointing method and pointing device

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.

Connected component analysis method which can reuse label

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.

Optical sensing system and optical sensing method

An image sensing system control method comprising: (a) receiving a first polling from the control circuit by the image sensor at a first polling time; (b) triggering a first dummy read at a first dummy read time after the first polling time, to compute output motion delta occurs between the first polling time and the first dummy read time according to frames sensed by the image sensor between the first polling time and the first dummy read time; (c) receiving a second polling from the control circuit by the image sensor at a second polling time after the first dummy read time; and (d) outputting the output motion delta to the control circuit by the image sensor in a predetermined time range of the second polling time.

Computer readable recording medium which can perform image sensing system control method and image sensing system

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.

Security camera and motion detecting method for security camera

An optical navigation system comprising a control circuit and an optical navigation device. The optical navigation device comprises: an image sensor, configured to generate a plurality of image frames; and a motion reporting device, configured to report a first motion of the optical navigation device to the control circuit at a first time after a reference time, and configured to report a second motion to the control circuit at a second time after the first time. The first motion and the second motion are calculated according to the image frames. The control circuit calculates a first scaled motion according to the first motion, the second motion, a first time difference between the first time and the reference time, and a second time difference between the first time and the second time.

Optical navigation device and optical navigation method

An image sensing system control method, comprises: (a) calculating a first motion delta between a first image frame and a second image frame following the first image frame by the image sensor; (b) calculating a first output motion delta according to a first time difference, a second time difference and the first motion delta by the image sensor if the image sensor receives a first polling from the control circuit, wherein the first time difference means a time difference between a time of the first polling and a time of the first image frame, and the second time difference means a time difference between a time of the first polling and a time of the second image frame; and (c) outputting the first output motion delta to the control circuit from the image sensor.

Computer readable recording medium can perform image sensing system control method and image sensing system

A non-transitory computer-readable medium storing a program causing a computer to execute an image processing method applied to an image sensing device. The image processing method comprises: (a) comparing a frame delta between a reference frame and a first frame with a predetermined threshold value to generate a first comparing result; (b) comparing a frame rate of the image sensing device with a minimum frame rate and/or a maximum frame rate, to generate a second comparing result; and (c) adjusting one of the frame rate and an offset for a correlation window of the image sensing device, according to the first comparing result and the second comparing result.

Non transitory computer readable recording medium for executing image processing method, and image sensing device applying the image processing method

An optical navigation device for controlling an operation of a pointer on a display apparatus is provided, the optical navigation device includes a device body, a substrate, a light source, an image sensor, and a processing module. The light source, the image sensor, and the processing module are respectively disposed on the substrate. The device body has a housing with an accommodating space formed therein. The substrate is arranged in the accommodating space of the housing. The light source operatively generates a light illuminating a navigation surface of the optical navigation device through the opening of the housing. The image sensor is oriented at a preset angle with respect to a long axis of device body and is configured for capturing images of the navigation surface. The processing module generates a displacement information of the optical navigation device relative to the navigation surface according to the images captured.

Optical navigation device with enhanced tracking speed

A method for making a lower frame rate of an optical navigation sensor mimic a higher frame rate of the optical navigation sensor includes: receiving a motion delta of the optical navigation sensor at the lower frame rate; dividing the motion delta into a smaller number of parts; dividing a time period of the lower frame rate to generate a time threshold which is shorter than the time period of the lower frame rate; receiving a clock signal for updating a counter; and outputting a first part of the delta when the counter reaches the time threshold.

Sub-frame accumulation method and apparatus for keeping reporting errors of an optical navigation sensor consistent across all frame rates

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.

Dynamic scale for mouse sensor runaway detection

An optical finger navigation system with object detection is provided for preventing cursor movement if a user's finger has been lifted from the navigation surface. The optical finger navigation system may include a light source, an image sensor and an object detection engine. The object detection engine may be operatively coupled with the image sensor and the light source to selectively report motion data upon determining the presence of an object by comparing a scaled-up pixel value with a threshold value. The lift detection engine may be incorporated in a microcontroller, wherein the microcontroller may be added to a navigation system to provide an additional object detection feature.

Optical navigation system with object detection

An imaging apparatus is described for obtaining images. The imaging apparatus includes a pixel array, a row decoder, a column decoder, and a trigger circuit. The pixel array integrates electrical signals corresponding to incident light from a scene. The row decoder enables a selected row of pixels within the pixel array. The column decoder enables readout of a pixel in a selected column of the selected row within the pixel array. The trigger circuit generates one or more burst pulses to traverse through a corresponding number of decoder stages that correspond to pixels which are identified for discarding. Each burst pulse has a duration that is less than a stipulated minimum pulse duration of a typical decoder pulse of the decoders. By using shorter burst pulses, the trigger circuit can quickly jump to a desired row and/or column of pixels for readout, while conserving power.

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Penang, Malaysia

Zi Hao Tan