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Image adjustment method and optical navigation device using the image adjustment method

An image adjustment and optical navigation technology, applied in image communication, color TV parts, TV system parts and other directions, can solve problems such as unclear characteristic images, and reduce the problem of image out of focus or unclear characteristics , the effect of accurate displacement detection

Active Publication Date: 2017-08-04
PIXART IMAGING INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Or the surface that the optical navigation passes has no obvious features, so it will get an image with ambiguous features

Method used

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  • Image adjustment method and optical navigation device using the image adjustment method
  • Image adjustment method and optical navigation device using the image adjustment method
  • Image adjustment method and optical navigation device using the image adjustment method

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Embodiment Construction

[0025] figure 1 A schematic diagram of the contrast enhancement action in the image adjustment method according to the embodiment of the present invention is shown. However, please note that this is only one of the implementation manners, and is not intended to limit the present invention. like figure 1 As shown, the average brightness value avg of the image will be calculated. This average brightness value avg can be the average brightness value of the previous image or the average brightness value of the current image. Then, the brightness value difference between a pixel brightness value to be adjusted and the average brightness value avg of a pixel to be adjusted in the current image is calculated, and the pixel to be adjusted is adjusted according to the brightness value difference. For example, the pixel to be adjusted P 1 The difference in luminance value from the average luminance value avg is X, which in one embodiment will make the adjusted pixel to be adjusted P ...

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Abstract

The invention discloses an image adjustment method, which includes: (a) capturing the current image; (b) calculating at least one kind of brightness information of the current image; (c) setting corresponding brightness information for different types of brightness information and (d) determining whether to perform a contrast enhancement action on the current image to generate an adjusted image according to the number of times the brightness information exceeds the threshold value, and determining the contrast enhancement action according to the number of times the brightness information exceeds the threshold value proportion.

Description

technical field [0001] The present invention relates to an image adjustment method and an optical navigation device using the image adjustment method, in particular to an image adjustment method that performs contrast enhancement actions according to various brightness information of the image and an optical navigation device using the image adjustment method. Background technique [0002] An optical navigation device (such as an optical mouse) uses an image sensor to capture continuous images, and then calculates the displacement of the optical navigation device based on the features in these images (such as brightness and darkness). However, the captured image may be affected by some factors and thus be out of focus or have indistinct features, which affects the correctness of the displacement calculation. [0003] For example, the thickness of the printed circuit board provided by the image sensor must be controlled within a certain range, otherwise the captured image wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/351G06F3/033
Inventor 陈之悠
Owner PIXART IMAGING INC
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