Optical navigation with a dynamic SQUAL threshold

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United States of America Patent

PATENT NO 8780045
APP PUB NO 20120127076A1
SERIAL NO

12950939

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Abstract

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A system and method for tracking movement between a surface and an optical navigation device are described. In an embodiment, the optical navigation device has an image sensor that includes an array of pixels and motion tracking involves acquiring image information, the image information including pixel values that correspond to the pixels, calculating a surface quality (SQUAL) value from the image information, determining a level of saturation of the pixel array from pixel values of the image information, comparing the determined level of saturation of the pixel array to a saturation threshold, increasing a SQUAL threshold if the determined level of saturation of the pixel array is greater than the saturation threshold, and deciding whether or not to output motion tracking information in response to a comparison of the SQUAL value to the SQUAL threshold. Other embodiments of the method are also described.

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Patent Owner(s)

  • PIXART IMAGING INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lee, Siew Chin Penang, MY 5 15
Lye, Keng Yeen Penang, MY 5 16
Song, Willie Penang, MY 21 120

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