Multiband imaging in high resolution for accurate color reproduction
ATSUGI, Japan – A new multiband imaging system that can generate images with more
than 100 megapixels – a maximum of 2 gigapixels – has been developed
for accurate color reproduction in medical, industrial and digital archiving applications.
The researchers who developed the system for NTT Communication Science Laboratories
also are developing a multiband moving-picture system.
A new multiband imaging technique reproduces color accurately for
digital archiving as well as for medical and industrial applications.
Masaru Tsuchida, along with colleagues Takahito Kawanishi and
Junji Yama-to, developed two solutions to the specialized-equipment and cost challenges
of existing multiband imaging technologies that precluded use in industrial and
The first solution was a two-shot six-band camera system –
based on a commercial 35-mm digital camera – and a customized interference
filter. The team’s multispectral color reproduction technique involves estimating
the spectral reflectance of a surface using data from every pixel, which allows
for accurate reproduction of color, independently of the imaging device used and
the lighting conditions.
Most multiband systems are multishot and cannot capture moving
pictures, and existing approaches are very expensive. The researchers combined multiband
and stereo imaging techniques, which enable simultaneous capture of spectral color
information and depth information.
- interference filter
- A filter that controls the spectral composition of transmitted energy partially by the effects of interference. Frequently, these filters are made up of thin layers of metals and dielectrics, resulting in high transmission over narrow spectral bands.
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