19 March 2003 4D volumetric imaging system
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There are shortcomings in existing 3D visualization technology. These may include poor image quality, significant computer processing requirements, and/or awkward viewing aids. These problems have been overcome with a 4D volumetric imaging system called Vis4D(TM) system. This system produces an image having apparent solidity suspended in space in front of the viewer. It is capable of displaying images for a wide range of general and specialized applications.
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Eamonn Ansbro, "4D volumetric imaging system", Proc. SPIE 4877, Opto-Ireland 2002: Optical Metrology, Imaging, and Machine Vision, (19 March 2003); doi: 10.1117/12.463776; https://doi.org/10.1117/12.463776

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