A ship detection method for full polarimetric SAR image

By using a ship detection method based on fully polarimetric SAR images, a detector is constructed by utilizing scattering characteristics and polarimetric anisotropy parameters, and adaptive detection is achieved by combining generalized gamma distribution. This solves the problems of missed detection and false alarms in ship detection in fully polarimetric SAR images, and enables accurate ship identification in complex marine backgrounds.

CN115700739BActive Publication Date: 2026-01-27SOUTHWEST JIAOTONG UNIV
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Patent Information

Application Number
CN202110826951.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-07-21
Publication Date
2026-01-27
Estimated Expiration
2041-07-21

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively detect ships in fully polarimetric SAR images, especially in complex marine environments where they are prone to missed detections or false alarms. Traditional detectors, such as the DBSP detector, cannot effectively characterize the scattering characteristics and polarimetric anisotropy of ships.

Method used

A ship detection method based on fully polarimetric SAR images is adopted. By preprocessing the images, the scattering power and polarimetric anisotropy parameters are extracted to construct a fully polarimetric SAR image detector. The statistical characteristics of the detector are described by the generalized gamma distribution to achieve constant false alarm rate adaptive detection.

Benefits of technology

It can effectively detect ships, reduce missed detections and false alarms, and accurately identify ship targets in complex maritime environments.

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Abstract

The application discloses a full polarization SAR image ship detection method, comprising the following steps: S1, pre-processing a full polarization SAR image to obtain different types of scattering power and polarization wave anisotropy parameters of each pixel; S2, using the decomposed different scattering power and combining the polarization wave anisotropy parameters to construct a full polarization SAR image detector; S3, using a generalized gamma distribution to describe the statistical characteristics of the full polarization SAR image detector to realize constant false alarm rate adaptive detection of the full polarization SAR image detector. The scattering characteristics and anisotropy of the scattering wave of the ship target are used to fully represent the ship target, so that the ship is strengthened and the background is weakened, and the ship can be detected from the complex marine background.
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