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

a computer-readable recording medium and image sensing technology, applied in image analysis, instruments, computing, etc., can solve the problems of affecting the accuracy of position computing, the output of motion delta and mcu polling will never be consistent, etc., and achieve the effect of reducing the

Active Publication Date: 2021-09-30
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach ensures that motion deltas are output corresponding to the time difference between frame and polling times, enhancing the accuracy of position computation by synchronizing the frame rate and polling rate.

Problems solved by technology

However, the MCU polling rate and the image sensor frame rate are usually different and non-synchronized with each other.
As a result, motion delta output and MCU polling will never be consistent.
Since the motion deltas are always applied to compute a position of the optical pointing device, the issues illustrated in FIG. 1 may affect the accuracy of position computing.

Method used

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

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Embodiment Construction

[0016]Several embodiments are provided in following descriptions to explain the concept of the present invention. Each component in following descriptions can be implemented by hardware (e.g. a device or a circuit) or hardware with software (e.g. a program installed to a processor). Besides, the method in following descriptions can be executed by programs stored in a non-transitory computer readable recording medium such as a hard disk, an optical disc or a memory. Besides, the term “first”, “second”, “third” in following descriptions are only for the purpose of distinguishing different one elements, and do not mean the sequence of the elements. For example, a first device and a second device only mean these devices can have the same structure but are different devices.

[0017]FIG. 2 is a block diagram illustrating an image sensing system 200 according to one embodiment of the present invention. As illustrated in FIG. 2, the image sensing system 200 comprises a control circuit 201 and...

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Abstract

An image sensing system control method, comprising: (a) predicting a first velocity of the image sensor; (b) calculating a first time duration between a first frame time and a first polling time after the first frame time, wherein the image sensor captures a first frame at the first frame time and receives a first polling from the control circuit at the first polling time; and (c) calculating a first predicted motion delta of the first time duration according to the first velocity and the first time duration.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention relates to an image sensing system control method and an image sensing system, and particularly relates to an image sensing system control method and an image sensing system which can reduce the effect caused by non-synchronization between the frame rate and the MCU polling.2. Description of the Prior Art[0002]In an optical navigation device such as an optical mouse, the image sensor thereof captures frames at a predetermined frame rate and then computes the motion delta between different frames. Such predetermined frame rate may change corresponding to different modes, for example, an active mode or a standby mode. Also, a MCU (micro control unit) polls the image sensor for motion delta (i.e. request the image sensor to output motion delta). However, the MCU polling rate and the image sensor frame rate are usually different and non-synchronized with each other. As a result, motion delta output and MCU p...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F3/0354G06T7/20
CPCG06F3/03543G06T7/20G06F9/5038G06F3/0317G06F3/0383H04N23/60
Inventor KONG, SHANG CHAN
Owner PIXART IMAGING INC