Forward-looking sonar target detection marking method capable of simultaneously marking shadows

Abstract

The invention provides a forward-looking sonar target detection marking method capable of simultaneously marking shadows, belongs to the field of forward-looking sonar image target detection, and aimsto mark the shadows of a target while marking the target. According to an existing forward-looking sonar target detection marking method, only the target is marked, for the forward-looking sonar image, the shadow of the target contains the shape characteristics of the target, the shadow of the target is marked in the marking process, and richer information can be provided for a detector. For thenewly proposed mark box, evaluation needs to be carried out by two parts of a target and a shadow, and a target detection frame uses the existing intersection-to-parallel ratio IOU evaluation; for a shadow detection frame, a plurality of position relations may occur between the shadow and the target, the invention provides an improved shadow key point similarity OKSS to evaluate the regression precision of the shadow detection frame.

Description

technical field [0001] The invention relates to a method for marking a forward-looking sonar image target, in particular to a forward-looking sonar target detection and marking method for simultaneously marking shadows, which can mark the target while marking the shadow of the target, and belongs to the field of forward-looking sonar target detection. Background technique [0002] In recent years, the target detection method based on deep learning has achieved great success in optical images. In the field of forward-looking sonar images, due to the precious characteristics of sonar images, the progress of target detection in forward-looking sonar images is not as good as that of optical images. Part of the method is to directly apply the deep learning detection model commonly used in optical images to sonar images without combining the characteristics of forward-looking sonar. The main reason for this problem is that the marking method of the forward-looking sonar target dir...

AI Technical Summary

Problems solved by technology

[0009] 1. The target may be floating in the water, the return wave around the target is weak, the shadow of the target is not obvious, only the outline of the target can be seen, and the shadow outline cannot be distinguished. In addition, it may be because the target is at the bottom of the water and the height is small, etc., or it may not be able to render shadows;

[0010] 2. The target may be in contact with the bottom of the water and is on the bottom of the water. It can distinguish the target from the shadow of the target, and can distinguish the outline of the shadow. The position where the shadow appears may be before the edge of the target ends;

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