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Image processing method and navigation device for detecting noise

A technology of image processing and navigation devices, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problems of affecting the operation feel and control accuracy, misjudgment of the displacement of the optical mouse, etc., and achieve improvement System convenience and market competitiveness, the effect of smooth cursor trajectory

Active Publication Date: 2019-04-12
PIXART IMAGING INC
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Problems solved by technology

However, under prolonged use or in an unclean operating environment, scratches or dust may occur on the internal optical components (such as the lens) of the light transmitter and / or light receiver, which will cause a fixed position within the field of view of the light receiver Noise points, the calculation processor is likely to misjudge the displacement of the optical mouse due to noise points, which affects the operating feel and control accuracy

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  • Image processing method and navigation device for detecting noise
  • Image processing method and navigation device for detecting noise
  • Image processing method and navigation device for detecting noise

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Embodiment Construction

[0018] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] see figure 1 and figure 2 , figure 1 is a functional block diagram of a navigation device 10 with a noise detection function according to an embodiment of the present invention, figure 2 It is a partial structural diagram of the navigation device 10 according to the embodiment of the present invention. The navigation device 10 includes a light emitting unit 12 , an image capturing unit 14 and a processing unit 16 . The processing unit 16 is electrically connected to the light emitting unit 12 and the image capturing unit 14 . The processing unit 16 can change the reference light intensity by controlling the adjustable shutter 18 and / or the adjustable aperture 20 of the light emitting unit 12 , so that the image capturing unit 14 can obtain an image with sufficient brightness. In the embodiment of the pre...

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Abstract

The invention discloses an image processing method used to detect noise. The method comprises: adjusting an illuminating unit to obtain an overexposure image, comparing each pixel of the overexposure image with at least a threshold value, when the luminance of one pixel of the overexposure image is lower than the threshold value, marking the pixel as a noise point, and eliminating the noise point, and executing displacement detection operation. The invention also discloses a navigation device with a noise detecting function.

Description

technical field [0001] The present invention provides an image processing method and its navigation device, especially an image processing method which can be used to detect noise, and its navigation device with noise detection function. Background technique [0002] In a traditional optical mouse, an optical transmitter, an optical receiver, and an operation processor are arranged in a casing. When the optical mouse moves, the light emitted by the light emitter is reflected by the desktop or the mouse pad and received by the light receiver. The calculation processor analyzes the reflected light to interpret the surface structure characteristics of the desktop or mouse pad, and uses these surface structure features in the light. The position change within the field of view of the receiver is used to calculate the displacement of the optical mouse. However, under prolonged use or in an unclean operating environment, scratches or dust may occur on the internal optical compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0354
Inventor 陈俊玮古人豪
Owner PIXART IMAGING INC
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