METHOD FOR DETERMINING SEA SURFACE ANOMALIES FROM OPTICAL IMAGES Russian patent published in 2022 - IPC G01C13/00 

FIELD: sea surface diagnosing means.

SUBSTANCE: invention relates to means for diagnosing the sea surface, in particular to remote control of the processes of interaction between wind waves and internal waves, inhomogeneous currents, etc. A method for determining sea surface anomalies from optical images, in which, with a rectilinear movement of the carrier (tack), a sequence of images of the sea surface is formed with a certain overlap and capturing the horizon line and part of the sky with an angular height of 5-7 degrees at oblique viewing angles using a video camera or photo camera and each image is processed, determining the viewing angle of the camera by the position of the horizon line in the image, which, in turn, is determined by the difference in image brightness at the border of the sea and sky. In the sequence of recorded images of the sea surface, two fragments that do not change position during the tack are selected, and one of the fragments is chosen so that it does not fall into the region of sun glare on the image and that it contains at least about 10 periods of surface waves, it excludes the constant component of the brightness of the sea surface and the green (G) component of the image fragment determine the relative area of ​​the collapse of the sea surface and the wave spectrum, and the second of the fragments is chosen as close to the nadir as possible or at an angle close to the Brewster angle, in it in each image the relative the spectral brightness of the sea surface in relation to the green (G) to blue (B) components of the image fragment. Then, the time dependences of all determined values ​​are analyzed by the sequence of images of the sea surface during the tack and a decision is made about the presence of an anomaly with a simultaneous deviation of the current values ​​of at least three of these values ​​from the average values ​​calculated from the sequence of images of the sea surface.

EFFECT: increasing the degree of reliability of detection of anomalies on the sea surface.

1 cl, 9 dwg