29 January 2007 Acquisition of three-dimensional coordinates of objects from Axi-Vision image data and application to stereoscopic display using integral photography system
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Proceedings Volume 6491, Videometrics IX; 64910X (2007); doi: 10.1117/12.703881
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States
Abstract
Versatile three-dimensional (3D) image data as in the form of I(X,Y,Z) defined in the camera coordinate system are acquired from sets of color image and depth image, which are simultaneously captured at a video frame rate by a 3D camera named Axi-Vision camera. The X and Y coordinates are calculated from the image coordinates (x, y) on the image plane of CCD based on the perspective projection theory. The Z coordinate can be obtained for each pixel of the color image directly from the depth image without any complex processing. Thus, the 3D image data of objects, I(X,Y,Z), is obtained from the relation between the camera coordinate and the image coordinate systems. A stereoscopic video image display is demonstrated using the 3D image data using an integral photography (IP) system, which combines a 4- inch VGA liquid crystal color display panel and a pinhole array. Aliasing, an issue from mismatch of image qualities between the 3D image data and the IP system, is effectively suppressed by pre-processing the color Axi-Vision image data using a two-dimensional lowpass filter, which is designed based on analyses of the maximum spatial frequency of the 3D image transformed appropriate for the LCD size and the Nyquist spatial frequency of the IP system.
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Tahito Aida, Akira Yoneda, Takeshi Uragaki, Masahiro Kawakita, "Acquisition of three-dimensional coordinates of objects from Axi-Vision image data and application to stereoscopic display using integral photography system", Proc. SPIE 6491, Videometrics IX, 64910X (29 January 2007); doi: 10.1117/12.703881; https://doi.org/10.1117/12.703881
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KEYWORDS
3D image processing

Cameras

3D displays

LCDs

3D acquisition

Spatial frequencies

Imaging systems

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