Apparatus and method of location determination in a thermal imaging system

A method, comprising:

• installing a thermal camera assembly at an actual mounting height in a real world different from a predetermined reference mounting height, the thermal camera assembly operable to generate thermal images of a scenery in the real world;
• receiving, by a computing device connected to the thermal camera assembly, the thermal images;
• guiding, via a mobile application, a user of the mobile application to position a reference object, visible in the thermal images generated by the thermal camera assembly, at a location in the scenery to capture the reference object in a first thermal image generated by the thermal camera assembly;
• and
• calibrating, by the computing device, mapping between a coordinate system of the thermal images and a coordinate system in the real world based on the predetermined reference mounting height, and a first height of the reference object as in the first thermal image from the thermal camera assembly.

A non-transitory computer storage medium storing instructions which, when executed in a computing device, cause the computing device to perform a method, comprising:

• receiving, from a thermal camera assembly installed at an actual mounting height in a real world different from a predetermined reference mounting height, thermal images of a scenery in the real world;
• guiding, via a mobile application, a user of the mobile application to position a reference object, visible in the thermal images generated by the thermal camera assembly, at a location in the scenery to capture the reference object in a first thermal image generated by the thermal camera assembly;
• and
• calibrating mapping between a coordinate system of the thermal images and a coordinate system in the real world based on the predetermined reference mounting height, and a first height of the reference object as in the first thermal image from the thermal camera assembly.