Matched filter data smoothing system
US5227972A · kind A · utility
10Cited by
3References
10Claims
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Key dates
| Filing date | Sep 18, 1989 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Sep 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An efficient spatial smoothing algorithm for filtering data while preserving spatial detail is obtained using the system (impulse response) function of the sensor. In contrast to the normal procedure for determining the filter coefficients for an arbitrary system function, this technique avoids the use of Fourier transforms. The spatial filtering coefficients are obtained analytically for the frequently applicable Gaussian system function. The efficiency of this procedure is illustrated by filtering discrete data. For realtime smoothing of nuclear log data, a filter length of five times the vertical resolution is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.