CPC G01S 17/66 (2013.01) [G01S 7/4808 (2013.01); G01S 7/4815 (2013.01); G01S 7/4816 (2013.01); G01S 17/46 (2013.01); G01S 17/50 (2013.01); G06T 7/521 (2017.01); H04N 23/51 (2023.01); H04N 23/56 (2023.01); G01S 17/08 (2013.01); G01S 17/48 (2013.01); G06T 2207/10004 (2013.01); G06T 2207/10152 (2013.01); H04N 5/33 (2013.01)] | 16 Claims |
1. A tracking device, configured to detect displacement with respect to a work surface, the tracking device comprising:
an image sensor configured to output image frames;
an optical lens;
a first light source configured to emit light toward the work surface to generate reflected light that impinges on the image sensor without passing through the optical lens;
a second light source configured to emit light toward the work surface to generate scattered light that impinges on the image sensor passing through the optical lens; and
a processor configured to
control the image sensor to capture a first image frame in conjunction with turning on the first light source but turning off the second light source in a switching mode,
control the image sensor to capture a second image frame in conjunction with turning on the second light source but turning off the first light source in the switching mode,
identify that the work surface is a strong reflective surface upon the first image frame having an image feature better that the second image frame, and
identify that the work surface is a weak reflective surface upon the second image frame having the image feature better that the first image frame.
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