Image analysis – Histogram processing – For setting a threshold
Patent
1988-10-03
1991-08-06
Boudeau, Leo H.
Image analysis
Histogram processing
For setting a threshold
346 33WL, 364422, 367 33, 367 69, 382 22, 382 54, G06K 900
Patent
active
050383787
ABSTRACT:
A method and apparatus are described for removing noise by smoothing fine resistivity measurements made with a tool from inside a borehole penetrating an earth formation. Pixel values representative of the resistivity measurements are examined to determine the directions of features in the measurements and a smoothing of the pixel values is then made along the measured directions. The orientations of the features are obtained with a similarlity investigation of pixels in sub-array windows along parallel lines whose slope is varied. Optimal slope lines along which the pixel values in a window best resemble each other are determined as the direction of the features. Smoothing is done along the optimal slope lines. Substantially noise free pixel measurements are obtained to enable subsequent automatic signal processing such as the detection of edges between layers of different resistivity. The edges are recorded with an emphasis on a visual display for enhanced visual analysis.
REFERENCES:
patent: 3624606 (1971-11-01), Lefevre
patent: 3728672 (1973-04-01), Dennis
patent: 4124870 (1978-11-01), Schatz
patent: 4320458 (1982-03-01), Vincent
patent: 4399461 (1983-08-01), Powell
patent: 4468623 (1984-08-01), Gianzero et al.
patent: 4499598 (1985-02-01), Chittineni
patent: 4541275 (1985-09-01), Kerzner
patent: 4543648 (1985-09-01), Hsu
patent: 4594691 (1986-06-01), Kimball et al.
patent: 4607352 (1985-08-01), Seeman
patent: 4638254 (1987-01-01), Uhri
patent: 4646240 (1987-02-01), Serra
"Semblance processing of borehole acoustic array data" Geophysicsvol. 49, No. 3, pp. 274-281 (Mar. 1984) by Kimball et al.
Boudeau Leo H.
Pojunas Leonard W.
Reens Louis H.
Schlumberger Technology Corporation
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