High-speed multispectral three-dimensional imaging with a compound-eye camera TOMBO
2010
We propose a high-speed multispectral three-dimensional imaging system based on a compact and thin compound-eye
camera called TOMBO. Wavelengths and times are assigned to the lenses in TOMBO. The time delays are introduced by
the rolling shutter of CMOS image sensors, and wavelength decomposition is realized by attaching several kinds of
wavelength filters to the lenses. A depth map is reproduced based on disparities in the unit images captured at the same
timing. In reproducing the depth map, sum of sum of absolute differences (SSAD) is evaluated after average equalization
to compare images for different wavelengths. A prototype of TOMBO is built with a SXGA monochrome CMOS image
sensor with a rolling shutter, optical crosstalk barriers, a commercial 5x5-element microlens array, and commercial
gelatin color filters. Enhancement of the frame rate and reproduction of a depth map and a 5-band deep-focus image are
demonstrated.
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