Image analysis – Applications – Motion or velocity measuring
Patent
1997-12-05
2000-10-10
Chang, Jon
Image analysis
Applications
Motion or velocity measuring
382210, 348 40, 359 9, G06T 720
Patent
active
061309575
ABSTRACT:
A scheme for producing computer generated holograms in which a motion vector of each object to be displayed is detected, objects are classified according to their motions, a hologram fringe pattern for each classified group of objects is calculated separately by image processing stored basic patterns, and a hologram to be displayed is produced by synthesizing all separately calculated hologram fringe patterns. In another aspect, a gaze point of the observer is determined, and a hologram to be displayed is produced by using high resolution hologram fringe patterns for objects located at the gaze point and low resolution hologram fringe patterns for regions other than the gaze point. In another aspect, a distance between each display target object and a hologram plane is obtained, a region of calculations for interference fringes due to each display target object is limited according to the obtained distance, interference fringes due to each display target object are separatedly calculated within the limited region of calculations, and a hologram to be displayed is produced by synthesizing separately calculated interference fringes due to all display target objects.
REFERENCES:
patent: 3888561 (1975-06-01), Kurtz
patent: 4408277 (1983-10-01), Cortellini et al.
patent: 4669812 (1987-06-01), Hoebing
patent: 5347375 (1994-09-01), Saito et al.
patent: 5515183 (1996-05-01), Hashimoto
patent: 5910111 (1999-06-01), Hunziker
Sato et al, "Holographic Television by Liquid Crystal Device." Third Int. Conf. on Holographic Systems, Components and Applications, pp. 20-23, Jan. 1991.
Jendral et al, "Synthetic Near-Field Holgrams with Localized Information." Optics Letters, vol. 20, No. 10, pp. 1204-1206, May 1995.
Hariharan, Optical Holography. Cambridge University Press, pp. 146-161, Jan. 1984.
Kabo et al., (1972), Soviet Journal of Quantum Electronics, vol. 1, No. 4, pp. 425-428.
Lucente, (1993) Journal Of Electronic Imaging, vol. 2, No. 1, pp. 28-34.
Lee, W.H., (1970), "Sampled Fourier Transform Hologram Generated by Computer.", Applied Optics, vol. 9, No. 3, pp. 639-643.
Waters, James P., (Oct. 1966), "Holographic Image Synthesis Utilizing Theoretical Methods." Applied Physics Letters, vol. 9, No. 11, pp. 405-407.
Lucente et al., (1995), "Rendering Interactive Holographic Images.", Computer Graphics, pp. 387-394.
Takahashi et al., (1995), "Direct Volume Access By An Improved Electro-Holography Image Generator.", SPIE, vol. 2406, pp. 220-225.
Shiwa et al., (1996), "Proposal For A 3-D Display With Accommodative Compensation: 3DDAC.", Journal of the SID, vol. 4, No. 4, pp. 255-262.
Benton, S.A., (Apr. 1991), "Experiments In Holographic Video Imaging.", 3D Forum, vol. 5, No. 2, pp. 36-56.
Sonehara et al., (1992), "Moving 3D-CGH Reconstruction Using A Liquid Crystal Spatial Wavefront Modulator." Japan Display '92, pp. 315-318.
Burckhardt, C.B., (Feb. 1968), "Information Reduction In Holograms For Visual Display." J. Opt. Soc. Am., vol. 58, No. 2, pp. 241-246.
Akimoto Takaaki
Higuchi Kazuhito
Horikoshi Tsutomu
Suzuki Satoshi
Chang Jon
Nippon Telegraph and Telephone Corporation
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