CPC G06T 7/248 (2017.01) [G01J 5/0025 (2013.01); G06T 7/11 (2017.01); G06T 7/136 (2017.01); G06T 7/187 (2017.01); G06T 7/215 (2017.01); G06T 7/254 (2017.01); G06T 2207/10016 (2013.01); G06T 2207/30232 (2013.01)] | 21 Claims |
13. A security sensor comprising:
an image capture device;
at least one processor; and
a data storage device storing instructions that when executed by the at least one processor cause the security sensor to
acquire first and second images using the image capture device,
determine differences in pixel intensities between the first and second images,
based on the differences, produce a third image, wherein a first intensity value of individual pixels in the third image corresponds to a magnitude of a difference in intensity between respective corresponding pixels in the first and second images,
determine a first threshold based on the third image,
produce a fourth image based on the first threshold, wherein each pixel in the fourth image has a respective second intensity value determined based on whether or not the first intensity value of a corresponding pixel in the third image exceeds the first threshold, and
identify a motion event based on the second intensity values of the pixels in the fourth image.
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