Image analysis – Image enhancement or restoration – Image filter
Patent
1998-05-28
2000-09-19
Tran, Phuoc
Image analysis
Image enhancement or restoration
Image filter
382254, 382261, 382262, 382263, 382264, 359885, 455213, 455339, 708300, G06K 940, G02B 522, H04B 210
Patent
active
061224049
ABSTRACT:
A visible Stokes polarimetric imager (80) that separately and contemporaneously measures each of the four separate Stokes polarization parameters of a visible light beam reflected from a scene. The imager (80) includes a compound prism assembly (50) including five prism elements (52-58). The reflected beam from the scene is collected by an input lens (84) in the imager (80), and is directed to the prism assembly (50) at a certain location. The prism elements (52-58) split the beam (82) into four separate beams (62-68) of substantially equal intensity that are emitted from the prism assembly (50) in different directions. Four separate polarimetric filters (86) and imaging devices (88) are positioned relative to the prism assembly (50) to separately receive each of the four beams (62-68) emitted from the prism assembly (50). One of the filters (86) is a neutral density filter, one of the filters only passes light that is plane polarized in the vertical direction, one of the filters only passes light as plane polarized light oriented 45.degree. from the vertical. The last filter only passes light that is circular polarized. Thus, each of the four imaging devices (88) measures the light intensity reflected from the scene for each of the four Stokes parameters. A processing system (102) aligns and processes the video frames of data from each of the imaging devices (88) so that the relative intensity in each of the four polarized directions can be determined for each location in the scene.
REFERENCES:
patent: 5057843 (1991-10-01), Dubois et al.
patent: 5081348 (1992-01-01), Siddiqui
patent: 5325381 (1994-06-01), Paoli
patent: 5343415 (1994-08-01), Itoh et al.
patent: 5490075 (1996-02-01), Howard et al.
patent: 5671264 (1997-09-01), Florent et al.
patent: 5721632 (1998-02-01), Billmers et al.
patent: 5873832 (1999-02-01), Maloney et al.
patent: 5930722 (1999-07-01), Han et al.
Serizawa, et al. "SDH-Based Time Synchronous System for Power System Communications", IEEE, vol. 13, No. 1, Jan. 1998.
J.D. Barter and P.H.Y. Lee, "Polarimetric Optical Imaging Of Scattering Surfaces", Oct., 1966/vol. 35, No. 30, Applied Optics.
Barter James D.
Lee Peter H. Y.
Mariam Daniel G.
Tran Phuoc
TRW Inc.
Yatsko Michael S.
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