Method of automatic identification of a shadow generated by a target real in an image in two dimensions of a sonar

摘要

Method of identification of a shadow of a real target in an image of a sonar, this method comprising: a) construction (70) of a search area inside which the shadow of the actual target must be identified, this step comprising: - the construction (71) of an outer casing of a bright spot generated by the reflection of an acoustic wave on a face of the actual target, and - the construction (74) of an angular sector of detection contained in the plane of the image and having as vertex the position, in the image, the emitter of the sonar and two edges, each edge of the outer envelope of the bright spot at least one point, the outer casing being entirely included between these two edges, the search zone which is the portion of the angular sector of detection is located on the side of the bright spot the most distant from the top of the angular sector of detection.