Scientists Create Single Pixel Camera For 3D Images
3D Printing Meets 3D Scanning
Scientists in Glasgow have discovered a low-cost way to create 3D images. Their system uses detectors which have a single pixel to sense light instead of the millions of pixels used in the imaging sensors of digital cameras. The detectors can “see” frequencies beyond visible light, which researchers say could open up new uses for 3D imaging in medicine and geography.
They said the single-pixel detectors cost “a few pounds” compared to current systems, which cost “thousands”. It is hoped that the system’s ability to senses wavelengths far beyond the capability of digital cameras and its low cost, could make it a valuable tool for a wide range of industries.
Researchers said possible uses could range from locating oil to helping doctors find tumours.
Lead author on the paper Baoqing Sun said: “It might seem a bit counter-intuitive to think that more information can be captured from a detector which uses just a single pixel rather than the multi-megapixel detectors found in conventional digital cameras.
However, digital camera sensors have a very limited sensitivity beyond the spectrum of visible light, whereas a single-pixel detector can easily be made to capture information far beyond the visible, reaching wavelengths from X-ray to TeraHertz.
The team’s paper, 3D Computational Imaging with Single-Pixel Detectors, is published in the journal, Science.
Here is a slideshow via BBC outlining how the camera works.