Image analysis – Histogram processing – For setting a threshold
Patent
1990-12-14
1993-01-19
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358112, 367131, 382 43, 382 54, G06K 900, H04N 531, H04B 1100
Patent
active
051812541
ABSTRACT:
To detect and classify features in a sonar image comprised of a matrix of pixels each pixel having a known greyness level a set of windows is defined such that each window is comprised of a set of adjacent pixels such that every pixel of the image is included in at least one window. Properties of the greyness level for the pixels in each window are defined to enable selection of those windows having specific features of greyness level in excess of a predetermined threshold. Matched filter correlations are performed on the pixels in the selected windows to identify highlights and shadows. The identifying highlights and shadows are classified as targets, anomalies or background.
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Petlevich, Jr. Walter J.
Schweizer Philipp F.
Boudreau Leo H.
Schron D.
Westinghouse Electric Corp.
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