Title:
【発明の名称】コヒーレントとコヒーレントでないものの組合わされた平均を最適にする平均面積制限された適応干渉計フィルタ
Document Type and Number:
Japanese Patent JP3299253
Kind Code:
B1
Abstract:
A family of multiple scale adaptive filters and filtering methods that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurements. A prefilter with fixed impulse response width is applied to a complex interferogram. The phase of the prefiltered complex interferogram is unwrapped. Then, a weighted combination of the phase-unwrapped, fixed-filtered interferograms is computed using a data-dependent criterion function. The resulting weighting function at each resolution element is typically a nonlinear function of interferogram magnitude and coherence for each fixed filter output at that resolution element.
Inventors:
Francott, Robert Tee
Application Number:
JP2000561512A
Publication Date:
July 08, 2002
Filing Date:
June 25, 1999
Export Citation:
Assignee:
Raytheon Company
International Classes:
G01S7/295; G01S13/90; H03H21/00; (IPC1-7): G01S13/90
Domestic Patent References:
| JP5249237A | ||||
| JP9264950A | ||||
| JP9159756A | ||||
| JP11118913A |
Other References:
【文献】米国特許5488374(US,A)
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)