Abstract
The thermal imaging camera is a new emerging tool in forensic visionary technology for seeing in total darkness and takes an image of heat radiation from an object in diverse weather condition like rain, fog and smoke etc. The normal close circuit television (CCTV) cameras are blinded by the sun resulting they do not see too much in total darkness. All objects, regardless of temperature, emit some level of energy. IR cameras have the unique ability to capture this information and display it in a thermal image to be viewed and analyzed. This paper describes some of science behind this technology and its application.
Highlights
Thermography is the science of infrared and thermal imaging. It is the use of a thermal imaging device or “IR camera” to view and measure the thermal energy emitted from a given object/surface relative to other object/surfaces
The infrared energy emitted from the measured object is converted into an electrical signal by the imaging sensor in the camera and displayed on a monitors a color or monochrome thermal image It is important to note that thermal imaging displays the amount of infrared energy emitted, transmitted, and reflected by an object
Incident Energy = Emitted Energy + Transmitted Energy + Reflected Energy Where Incident Energy is the energy profile when viewed through a thermal imaging device, Emitted Energy is generally what is intended to be measured, Transmitted Energy is the energy that passes through the subject from a remote thermal source, and Reflected Energy is the amount of energy that reflects off the surface of the object from a remote thermal source
Summary
Thermography is the science of infrared and thermal imaging It is the use of a thermal imaging device or “IR camera” to view and measure the thermal energy emitted from a given object/surface relative to other object/surfaces. THERMAL IMAGING FOR LAW ENFORCEMENT Thermal imagers use infrared technology to give law enforcement officers a reliable heat picture of their surroundings, providing them a range of abilities they do not have when using night vision or flashlights. Money and weapons thrown by a suspect during a pursuit will retain heat from the suspect As such, they should be easier to locate with a thermal imager once the suspect is apprehended. The thermal imagery can be recorded for use as evidence later, or it can be used to justify specific interaction with the suspect
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