Unconstrained 2-D transformation filter

Details Unconstrained 2-D transformation filter Unconstrained 2-D transformation filter

1995-09-29

1998-10-27

Cosimano, Edward R.

Boots, shoes, and leggings

364572, 36472401, 367 14, 367 37, 367 38, G01V 130, G01V 128, G06F 1900

Patent

active

058285709

ABSTRACT:
An unconstrained transformation filter operator that is efficient in terms of computer resources and that improves circularly symmetric migrated impulse response for steep dips. The filter operator combines selected desirable attributes of the more efficient McClellan transformation filter with selected desirable attributes of the more accurate Laplacian transformation filter. The novel filter operator is not constrained along the k.sub.x and k.sub.y spatial axes by the requirement that it equal cos (k). The transformation filter is averaged over all azimuths to improve its accuracy of response.

REFERENCES:
patent: 4006481 (1977-02-01), Young et al.
Hale, Dave; "3-D depth migration via McClellan transformations", Geophysics, 1991, pp. 1-18.
Hazra, Satya N. and Reddy, M. Sudhakara; "Design of Circularly Symmetric Low-Pass Two-Dimensional FIR Digital Filters Using Transformation", IEEE Transactions on Circuits and Systems, vol. CAS-33, No. 10, Oct. 1986, 5 pages.

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