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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Antistretch Edge Detector for SAR Images
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Antistretch Edge Detector for SAR Images

机译：SAR图像抗拉伸边缘检测器

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摘要

In this letter, an antistretch edge detector has been proposed for synthetic aperture radar (SAR) images. Traditional detectors using anisotropy edge detection filters often incur severe edge stretch. If isotropy edge detection filters are used, the detectors usually have poor edge resolution. Hence, we skillfully fuse an anisotropy edge detection filter with an isotropy one. By embedding the fused filter into the routine ratio-based SAR edge detector, an antistretch edge detector is proposed. Benefiting from the fused edge detection filter, the proposed edge detector can obtain a good antistretch ability and keep a high edge resolution. A theoretical analysis indicates that the computational complexity of the proposed edge detector is close to conventional ratio-based edge detectors. The fusion operation will not affect the constant false alarm rate property. The receiver-operating-characteristic curves are used to objectively evaluate the proposed detector. Experimental studies show that the proposed detector has a lower false positive rate than the majority of detectors using only anisotropy filters or isotropy filters. Furthermore, the experimental results on simulated and real-world SAR images show that the proposed antistretch edge detector can obtain an accurate edge map.
机译：在这封信中，已经提出了用于合成孔径雷达（SAR）图像的抗拉伸边缘检测器。使用各向异性边缘检测滤波器的传统检测器通常会导致严重的边缘拉伸。如果使用各向同性边缘检测滤波器，则检测器通常具有较差的边缘分辨率。因此，我们巧妙地将各向异性边缘检测滤波器与各向同性融合在一起。通过将融合滤波器嵌入到常规的基于比率的SAR边缘检测器中，提出了一种抗拉伸边缘检测器。受益于融合的边缘检测滤波器，所提出的边缘检测器可以获得良好的抗拉伸能力并保持较高的边缘分辨率。理论分析表明，所提出的边缘检测器的计算复杂度接近传统的基于比率的边缘检测器。融合操作将不会影响恒定的误报率属性。接收器的工作特性曲线用于客观地评估所提出的检测器。实验研究表明，与仅使用各向异性过滤器或各向同性过滤器的大多数检测器相比，该检测器的误报率更低。此外，在模拟和真实SAR图像上的实验结果表明，所提出的抗拉伸边缘检测器可以获得准确的边缘图。

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