Method for automatically identifying targets in sonar images
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United States of America Patent
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Jan 19, 1993
Grant Date -
N/A
app pub date -
Dec 14, 1990
filing date -
Dec 14, 1990
priority date (Note) -
Expired
status (Latency Note)
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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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