Arbitrary-Direction SAR Ship Detection Method for Multiscale Imbalance

Arbitrary-oriented ship detection in SAR imagery remains especially challenging due to multi-scale imbalance and the characteristics of SAR imaging, a problem that is more pronounced than in optical ship detection. Unlike optical images, SAR data often lack rich textural and color cues, instead exhibiting non-uniform scattering, speckle noise, and non-standard elliptical ship shapes, all of which make robust feature extraction and bounding box regression significantly more difficult across different scales. To address these unique SAR-specific challenges, this paper proposes the Multi-Scale Dynamic Feature Fusion Network (MSDFF-Net) aims to alleviate multi-scale imbalance in three main ways. First, a…

• NN
  National Natural Science Foundation of China

  Awards: 62401584, 62471475, 62001480
• NS
  Natural Science Foundation of Hunan Province

  Award: 2024JJ4045
• YE
  Young Elite Scientists Sponsorship Program by Tianjin