| 摘要 |
The invention relates to a method for identifying a shadow of an actual target in an image from sonar, this method comprising a) producing (70) a search area within which the shadow of the actual target is intended to be identified, said step comprising: producing (71) an outer envelope of a bright spot generated by the reflection of an acoustic wave on a surface of the actual target; and producing (74) an angular detection sector that is contained in the plane of the image, has the position of the sonar transmitter in the image as the vertex thereof, and has two edges, each edge adjoining the outer envelope of the bright spot at at least one respective point, the entirety of the outer envelope being contained between said two edges, the produced search area being the portion of the angular detection sector located on the side of the bright spot furthest from the vertex of the angular detection sector. |
