Method and system for identifying reflections in thermal images

A system for detecting a reflection in a first, thermal image captured by a thermal image sensor, the system comprising:

• an image receiver configured to receive the thermal image and a second image captured by a visible light image sensor, a near infrared sensor, or a short-wave infrared sensor, the thermal image and the second image having overlapping fields of view,
• a mapping module configured to determine a mapping from coordinates in the thermal image to coordinates in the second image,
• an object detector configured to detect a first object in a first position in the thermal image,
• an image area analyser configured to analyse a candidate image area in a second position in the second image to determine if an object equivalent to the first object is present in the candidate image area, the second position corresponding to the first position according to the relationship between the coordinates in the thermal image and the coordinates in the second image,
• a reflection determination module configured to determine that the first object is a reflection in response to a determination that there is no equivalent object in the candidate image area.