Image Processing Reference
Figure1.22 Ruysdael painting imaged in visible (400-750 nm) [top and bottom-left] and
SWIR (1400-1700 nm) [bottom-right]. (Images courtesy of Yosi Poseilov, Los Angeles
County Museum of Art)
painted to match the veneer. The paint is transparent to near-IR, showing the dark
filler wax between the pieces of veneer.
There are many uses for SWIR imaging in military applications, including
visualization of laser designators, detecting camouflage, and range-gated imaging,
which is a special technique for seeing through snow, rain and dust. One very
interesting example of SWIR imaging is shown in Fig. 1.24: a test in February
2010 of the missile-destroying capability of the Airborne Laser (ABL) system, a
specially modified Boeing 747 with a huge SWIR chemical laser weapon integrated
into the entire rear of the plane. The beam, which has a wavelength of 1310 nm,
emerges from an optical system on the “chin” of the plane.