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arXiv 1906.09447cs.CV
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航空影像中有向目标的自适应周期嵌入

Adaptive Period Embedding for Representing Oriented Objects in Aerial Images

National Engineering Laboratory for Speech and Language Information Processing(语音及语言信息处理国家工程实验室);University of Science and Technology of China(中国科学技术大学)

Yixing Zhu, Xueqing Wu, Jun Du

摘要:

我们提出了一种新的方法表示定向对象在航空图像自适应周期嵌入(APE)。传统的目标检测方法是用水平包围盒来表示目标,而航空影像中的目标是定向的。计算物体的角度是一项具有挑战性的任务。虽然几乎所有以前的航空图像对象检测器都直接回归对象的角度,但它们使用复杂的规则来计算角度,并且它们的性能受到规则设计的限制。相比之下,我们的方法是基于定向对象的角度周期性。该角度用两个周期不同的二维周期矢量表示,该矢量随形状的变化而连续。与以往的方法相比,该方法的标签生成规则更加简单合理。该方法具有通用性,可推广到其他定向探测器。此外,我们提出了一种新的长对象的IoU计算方法命名为长度无关IoU(LIIoU)。我们截取目标框的长边的一部分,以获得建议框和截取的目标框之间的最大IoU。因此,一些长盒将具有对应的阳性样本。我们的方法达到了DOAI2019竞赛任务1(面向对象)的第一名,该任务是在与IEEE CVPR 2019联合举办的航空图像中检测对象研讨会上举行的。

英文摘要:

We propose a novel method for representing oriented objects in aerial images named Adaptive Period Embedding (APE). While traditional object detection methods represent object with horizontal bounding boxes, the objects in aerial images are oritented. Calculating the angle of object is an yet challenging task. While almost all previous object detectors for aerial images directly regress the angle of objects, they use complex rules to calculate the angle, and their performance is limited by the rule design. In contrast, our method is based on the angular periodicity of oriented objects. The angle is represented by two two-dimensional periodic vectors whose periods are different, the vector is continuous as shape changes. The label generation rule is more simple and reasonable compared with previous methods. The proposed method is general and can be applied to other oriented detector. Besides, we propose a novel IoU calculation method for long objects named length independent IoU (LIIoU). We intercept part of the long side of the target box to get the maximum IoU between the proposed box and the intercepted target box. Thereby, some long boxes will have corresponding positive samples. Our method reaches the 1st place of DOAI2019 competition task1 (oriented object) held in workshop on Detecting Objects in Aerial Images in conjunction with IEEE CVPR 2019.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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