Spectral technology helps to find the grave

Scientists at McGill University in Canada have successfully developed a new exploration technique called Ultra High Spectral Image (HI), which can detect the smallest change in light emanating from trees or decayed soil.

From a study of soil responses to plants, Professor Andre Costopoulos said that decay animals would affect the amount of chlorophyll in the leaves. If we measure this change, finding buried animals becomes easy.

They equipped a plane with two cameras. The first to record light in visible and ultraviolet light. The second is to recognize ultraviolet light and longer wavelength light. The device is called Ultra High Spectral (HI) image. "Just having a rot, you can see the difference with this device," Costopoulos said.

Thanks to HI, they discovered 25 unmarked graves, some of which were located at a depth of nearly 2.5 meters. "Only by one flight, we have collected four times more information, five times than nine months ago," Costopoulos said .

Professor Andre Costopoulos next to a buried pit discovered.

On the principle of the work of HI, the scientists explained: In the first five years, the body decomposes hindered the growth of plants. Because the environment is originally toxic to plants, they do not radiate the visible light and the surrounding ultraviolet light, so the camera can not break. Over the next five years, plants grow on decaying tissues that emit radiation, instead of absorbing them.

According to the study, these plants emit green light twice as much as plants grown on graves. Human eyes can not detect this tiny change, but with HI cameras it is possible.

With the rise of chlorophyll, the amount of radiation is increased. Decomposition will provide more nutrients for plants, especially nitrogen and phosphorus.

The plant grows faster, leaves grow larger and radiate more light. Decomposition into stools corresponds to the size of the body.

This research opens the door to the search for graves or the murder of murderers whose bodies were buried underground.