China's 'intrusion' aftermath: India goes for hi-tech thermal-imaging to check borders
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- 2 of 2How does thermal imaging work?After the Boston Marathon bombings, a helicopter equipped with a thermal imager had spotted the heat signature of a person inside a tarp-covered boat, sitting in a backyard in Watertown.Thermal imagers can spot the signature of a heat source inside a house, a vehicle, or in this case, a vessel. Walls may stop visible-light wavelengths, but the heat can still pass through. Variations in heat emissions can be picked up by camera chips designed to be sensitive to the infrared part of the spectrum.India is initiating talks in this matter with countries like Korea, Israel, Japan and America to assist in trials of these devices.
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