Researchers say these supercameras could have military, commercial and civilian applications, and that handheld gigapixel cameras may one day be possible.
The gigapixel camera uses 98 identical microcameras in unison, each armed with its own set of optics and a 14-megapixel sensor. These microcameras, in turn, all peer through a single large spherical lens to collectively see the scene the system aims to capture. Since the optics of the microcameras are small, they are relatively easy and cheap to fabricate.
A specially designed electronic processing unit stitches together all the partial images each microcamera takes into a giant, one-gigapixel image. In comparison, film can have a resolution of about 25 to 800 megapixels, depending on the kind of film used.
"In the near-term, gigapixel cameras will be used for wide-area security, large-scale event capture — for example, sport events and concerts — and wide-area multiple-user scene surveillance — for example, wildlife refuges, natural wonders, tourist attractions," said researcher David Brady, an imaging researcher at Duke University in Durham, N.C., told InnovationNewsDaily. "As an example, a gigapixel camera mounted over the Grand Canyon or Times Square will enable arbitrarily large numbers of users to simultaneously log on and explore the scene via telepresence with much greater resolution than they could if they were physically present."
The camera also currently only takes black-and-white images, since color pictures are more difficult to analyze. "Next-generation systems will be color cameras," Brady said.
In addition, the camera is quite large, measuring 29.5 by 29.5 by 19.6 inches (75 by 75 by 50 centimeters), a size required by the space currently needed to cool its electronics and keep them from overheating. The researchers hope that as more efficient and compact electronics get developed, handheld gigapixel cameras might one day emerge, similar in size to current handheld single-lens reflex (SLR) cameras.
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"Of course, it is not possible for a person to hold a camera steady enough to capture the full resolution of a gigapixel camera, so it may be desirable to mount the camera on a tripod," Brady said. "On the other hand, motion compensation strategies may overcome this challenge."
The researchers are also working on more powerful cameras. They have currently built a two-gigapixel prototype camera that possesses 226 microcameras, and are in the manufacturing phase for a 10-gigapixel system. Ten- to 100-gigapixel cameras "will remain more backpack-size rather than handheld," Brady said.
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