KEYWORDS: Cameras, Imaging systems, Integral imaging, 3D displays, Prototyping, Calibration, 3D image processing, Clouds, 3D volumetric displays, Video
A real-time and wide-field-of-view image pickup system for coarse integral volumetric imaging (CIVI) is realized. This
system is to apply CIVI display for live action videos generated by the real-time 3D reconstruction. By using multiple
RGB-D cameras from different directions, a complete surface of the objects and a wide field of views can be shown in
our CIVI displays. A prototype system is constructed and it works as follows. Firstly, image features and depth data are
used for a fast and accurate calibration. Secondly, 3D point cloud data are obtained by each RGB-D camera and they are
all converted into the same coordinate system. Thirdly, multiview images are constructed by perspective transformation
from different viewpoints. Finally, the image for each viewpoint is divided depending on the depth of each pixel for a
volumetric view. The experiments show a better result than using only one RGB-D camera and the whole system works
on the real-time basis.
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