Apparatus, systems and methods for shadow assisted object recognition and tracking

A device, comprising:

• a memory having a program stored thereon;
• and
• a processor coupled to the memory, wherein the processor executes the program to cause the processor to perform operations comprising:
• receiving a video image that includes:
• an object that is elevated with respect to ground level in the video image,
• a first shadow of the object, and
• a second shadow of the object;
• and
• determining three-dimensional positional information corresponding to a location of the object based on a detected position of the object in the video image and an intersection point of i) a first direction line corresponding to the first shadow and ii) a second direction line corresponding to the second shadow.

A non-transitory computer readable storage medium comprising a plurality of instructions, that when executed by a processor cause the processor to perform operations comprising:

• receiving a video image that includes:
• an object that is elevated with respect to ground level in the video image,
• a first shadow of the object, and
• a second shadow of the object;
• and
• determining three-dimensional positional information corresponding to a location of the object based on a detected position of the object in the video image and an intersection point of i) a first direction line corresponding to the first shadow and ii) a second direction line corresponding to the second shadow.