Image analysis – Image enhancement or restoration – Image filter
Patent
1996-10-15
1998-02-17
Rogers, Scott A.
Image analysis
Image enhancement or restoration
Image filter
382263, 382264, 382274, 382302, G06T 500, G06T 700
Patent
active
057199663
ABSTRACT:
An apparatus for assessing the visibility of differences between two input image sequences. The apparatus comprises a pair of pre-filtered processors, a pair of pyramid constructors and a JND processor. Each pre-filter processor receives a separate input image sequence and performs temporal filtering to produce a low-pass temporal response and a bandpass temporal response. In turn, the pyramid constructors receive the temporal responses and generate contrast pyramids for the temporal responses. The JND processor evaluates the contrast pyramids to produce an image metric which is used to assess the visibility of differences between the two input image sequences.
REFERENCES:
patent: 4674125 (1987-06-01), Carlson et al.
patent: 4718104 (1988-01-01), Anderson
patent: 5359674 (1994-10-01), van der Wal
Gooitzen S. Van Der Wal and Peter J. Burt, "A VLSI Pyramid Chip for Multiresolution Image Analysis", International Journal of Computer Vision, 8:3, 177-189 (1992).
Burt, P. J., The Laplacian Pyramid as a Compact Image Code, IEEE Transactions on Communications, vol. COM-31, No. 4, pp. 532-540.
Brill Michael Henry
Lubin Jeffrey
van der Wal Gooitzen Siemen
Burke William J.
David Sarnoff Research Center Inc.
Rogers Scott A.
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