Image Processing Reference
In-Depth Information
Figure2.31 Hummingbird in flight—MWIR (3-5 mm). (CourtesyofFLIR)
Figure2.32 LWIR image of a bee ball (left) and visible image of a dead hornet dragged
by bees (right). (CourtesyofDr.MasatoOno,TamagawaUniversity,Tokyo)
themselves, a close match in a thermal “arms race.” 7 The left image in Fig. 2.32
shows a LWIR image of a ball of bees taken with an uncooled microbolometer
camera. Note the maximum temperature of the ball's surface is about43 C
(109 : 4 F), according to the pseudocolor bar along the top of the image (white
is equivalent to48 C[118 : 4 F], pink is just a bit colder). The right image in
Fig. 2.32 shows a dead hornet being dragged out of the hive by worker bees that
have just killed it with a ball.
Thermal Imaging in Astronomy
As mentioned in the introduction, astronomers have used imaging technology to
extend celestial observation over a large range of the electromagnetic spectrum.
Infrared telescopes are part of this modern family of instruments. They are able
to see thermal phenomena that are not apparent to visible-light instruments.
Some of these infrared telescopes are ground-based, usually on mountaintops or
7 Ono et al, “Unusual thermal defence by a honeybee against mass attack by hornets,” Nature, 377,
334-336 (1995).
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