《计算机应用》唯一官方网站 ›› 2024, Vol. 44 ›› Issue (7): 2200-2207.DOI: 10.11772/j.issn.1001-9081.2023071033
收稿日期:
2023-07-31
修回日期:
2023-09-23
接受日期:
2023-10-10
发布日期:
2023-10-26
出版日期:
2024-07-10
通讯作者:
姬张建
作者简介:
杜娜(1999—),女,山西吕梁人,硕士研究生,主要研究方向:计算机视觉、目标检测。基金资助:
Received:
2023-07-31
Revised:
2023-09-23
Accepted:
2023-10-10
Online:
2023-10-26
Published:
2024-07-10
Contact:
Zhangjian JI
About author:
DU Na, born in 1999, M. S. candidate. Her research interests include computer vision, object detection.Supported by:
摘要:
针对航拍场景中包含的目标尺寸小、有效特征信息少的问题,提出一种基于改进的变焦网络VFNet(VariFocalNet)的航拍场景中微小目标检测算法。首先,为增强微小目标的特征表征能力,采用特征提取性能更好的循环层聚合网络(RLANet)代替ResNet作为主干网络;其次,为解决特征金字塔自顶向下融合时顶层特征信息丢失问题,引入特征增强模块(FEM);然后,为解决现有标签分配方法在微小目标标签分配上的样本分布不平衡问题,改进的VFNet采用了基于高斯感受野的标签分配方法;最后,为减小微小目标对位置偏移的敏感性,引入一种边界框回归损失函数Wasserstein损失测量预测边界框高斯分布和真值框高斯分布的相似性。在AI-TOD数据集上的实验结果表明:改进后的VFNet算法的平均精度均值(mAP)达到了14.9%;与改进前的算法相比,在航拍场景下的微小目标上的检测mAP提高了4.7个百分点。
中图分类号:
姬张建, 杜娜. 基于改进VariFocalNet的微小目标检测[J]. 计算机应用, 2024, 44(7): 2200-2207.
Zhangjian JI, Na DU. Tiny target detection based on improved VariFocalNet[J]. Journal of Computer Applications, 2024, 44(7): 2200-2207.
算法 | 主干 | mAP | ||||||
---|---|---|---|---|---|---|---|---|
文献[ | RLANet-50 | 11.1 | 25.8 | 8.1 | 2.6 | 12.0 | 14.9 | 21.6 |
VFNet[ | ResNet-50 | 10.2 | 23.5 | 7.2 | 2.3 | 11.0 | 13.3 | 19.8 |
Faster R-CNN[ | ResNet-50 | 11.1 | 26.3 | 7.6 | 0.0 | 7.2 | 23.3 | 33.6 |
Cascade R-CNN[ | ResNet-50 | 13.8 | 30.8 | 10.5 | 0.0 | 10.6 | 25.5 | 36.6 |
SSD[ | ResNet-50 | 7.0 | 21.7 | 2.8 | 1.0 | 4.7 | 11.5 | 13.5 |
RetinaNet[ | ResNet-50 | 8.7 | 22.3 | 4.8 | 2.4 | 8.9 | 12.2 | 16.0 |
RepPonits[ | ResNet-50 | 9.2 | 23.6 | 5.3 | 2.5 | 9.2 | 12.9 | 14.4 |
FCOS[ | ResNet-50 | 12.6 | 30.4 | 8.1 | 2.3 | 12.2 | 17.2 | 25.0 |
FoveaBox[ | ResNet-50 | 8.1 | 19.8 | 5.1 | 0.9 | 5.8 | 13.4 | 15.9 |
PAA[ | ResNet-50 | 10.0 | 26.5 | 6.7 | 3.5 | 10.5 | 13.1 | 22.1 |
ATSS[ | ResNet-50 | 12.8 | 30.6 | 8.5 | 1.9 | 11.6 | 19.5 | 29.2 |
OTA[ | ResNet-50 | 10.4 | 24.3 | 7.2 | 2.5 | 11.9 | 15.7 | 20.9 |
AutoAssign[ | ResNet-50 | 12.2 | 32.0 | 6.8 | 3.4 | 13.7 | 16.0 | 19.1 |
GFL[ | ResNet-50 | 11.1 | 25.1 | 8.2 | 2.3 | 11.9 | 14.6 | 23.0 |
TridentNet[ | ResNet-50 | 7.5 | 20.9 | 3.6 | 1.0 | 5.8 | 12.6 | 14.0 |
本文算法 | RLANet-50 | 14.9 | 36.5 | 9.8 | 4.4 | 16.3 | 18.8 | 22.9 |
表1 不同检测算法在AI-TOD数据集的检测结果对比 ( %)
Tab. 1 Comparison of detection results of different detection algorithms on AI-TOD dataset
算法 | 主干 | mAP | ||||||
---|---|---|---|---|---|---|---|---|
文献[ | RLANet-50 | 11.1 | 25.8 | 8.1 | 2.6 | 12.0 | 14.9 | 21.6 |
VFNet[ | ResNet-50 | 10.2 | 23.5 | 7.2 | 2.3 | 11.0 | 13.3 | 19.8 |
Faster R-CNN[ | ResNet-50 | 11.1 | 26.3 | 7.6 | 0.0 | 7.2 | 23.3 | 33.6 |
Cascade R-CNN[ | ResNet-50 | 13.8 | 30.8 | 10.5 | 0.0 | 10.6 | 25.5 | 36.6 |
SSD[ | ResNet-50 | 7.0 | 21.7 | 2.8 | 1.0 | 4.7 | 11.5 | 13.5 |
RetinaNet[ | ResNet-50 | 8.7 | 22.3 | 4.8 | 2.4 | 8.9 | 12.2 | 16.0 |
RepPonits[ | ResNet-50 | 9.2 | 23.6 | 5.3 | 2.5 | 9.2 | 12.9 | 14.4 |
FCOS[ | ResNet-50 | 12.6 | 30.4 | 8.1 | 2.3 | 12.2 | 17.2 | 25.0 |
FoveaBox[ | ResNet-50 | 8.1 | 19.8 | 5.1 | 0.9 | 5.8 | 13.4 | 15.9 |
PAA[ | ResNet-50 | 10.0 | 26.5 | 6.7 | 3.5 | 10.5 | 13.1 | 22.1 |
ATSS[ | ResNet-50 | 12.8 | 30.6 | 8.5 | 1.9 | 11.6 | 19.5 | 29.2 |
OTA[ | ResNet-50 | 10.4 | 24.3 | 7.2 | 2.5 | 11.9 | 15.7 | 20.9 |
AutoAssign[ | ResNet-50 | 12.2 | 32.0 | 6.8 | 3.4 | 13.7 | 16.0 | 19.1 |
GFL[ | ResNet-50 | 11.1 | 25.1 | 8.2 | 2.3 | 11.9 | 14.6 | 23.0 |
TridentNet[ | ResNet-50 | 7.5 | 20.9 | 3.6 | 1.0 | 5.8 | 12.6 | 14.0 |
本文算法 | RLANet-50 | 14.9 | 36.5 | 9.8 | 4.4 | 16.3 | 18.8 | 22.9 |
算法 | mAP | |||
---|---|---|---|---|
VFNet[ | 13.5 | 32.1 | 2.6 | 12.3 |
RetinaNet[ | 8.9 | 24.2 | 2.7 | 8.4 |
FCOS[ | 12.0 | 30.2 | 2.2 | 11.1 |
本文算法 | 15.4 | 37.4 | 4.4 | 15.8 |
表2 不同检测算法在AI-TODv2数据集的检测结果对比 ( %)
Tab. 2 Comparison of detection results of different detection algorithms on AI-TODv2 dataset
算法 | mAP | |||
---|---|---|---|---|
VFNet[ | 13.5 | 32.1 | 2.6 | 12.3 |
RetinaNet[ | 8.9 | 24.2 | 2.7 | 8.4 |
FCOS[ | 12.0 | 30.2 | 2.2 | 11.1 |
本文算法 | 15.4 | 37.4 | 4.4 | 15.8 |
算法 | mAP | |||
---|---|---|---|---|
VFNet[ | 23.4 | 38.2 | 1.7 | 7.1 |
RetinaNet[ | 17.4 | 29.4 | 0.8 | 2.5 |
FCOS[ | 14.1 | 25.5 | 0.1 | 2.1 |
本文算法 | 25.0 | 44.4 | 2.8 | 10.3 |
表3 不同检测算法在VisDrone2019数据集的检测结果对比
Tab. 3 Comparison of detection results of different detection algorithms on VisDrone2019 dataset
算法 | mAP | |||
---|---|---|---|---|
VFNet[ | 23.4 | 38.2 | 1.7 | 7.1 |
RetinaNet[ | 17.4 | 29.4 | 0.8 | 2.5 |
FCOS[ | 14.1 | 25.5 | 0.1 | 2.1 |
本文算法 | 25.0 | 44.4 | 2.8 | 10.3 |
主干 | FEM | 标签分配 | Wasserstein损失 | mAP | ||||||
---|---|---|---|---|---|---|---|---|---|---|
ResNet-50 | 10.2 | 23.5 | 7.2 | 2.3 | 11.0 | 13.3 | 19.8 | |||
√ | 11.2 | 26.3 | 7.7 | 2.5 | 12.2 | 14.6 | 21.1 | |||
√ | 12.7 | 29.5 | 9.2 | 4.1 | 14.3 | 14.7 | 19.5 | |||
√ | 10.7 | 25.8 | 7.0 | 2.4 | 11.5 | 14.8 | 21.2 | |||
√ | √ | √ | 13.7 | 33.2 | 9.0 | 4.0 | 15.2 | 16.8 | 21.7 | |
RLANet-50 | 12.3 | 29.3 | 8.2 | 2.8 | 13.1 | 16.8 | 23.4 | |||
√ | 11.9 | 28.5 | 8.2 | 2.7 | 12.9 | 16.1 | 22.7 | |||
√ | 14.1 | 33.8 | 9.7 | 5.1 | 15.6 | 17.9 | 22.1 | |||
√ | 11.2 | 27.3 | 7.3 | 2.5 | 11.7 | 15.9 | 24.3 | |||
√ | √ | √ | 14.9 | 36.5 | 9.8 | 4.4 | 16.3 | 18.8 | 22.9 |
表4 消融实验结果 ( %)
Tab. 4 Ablation experiment results
主干 | FEM | 标签分配 | Wasserstein损失 | mAP | ||||||
---|---|---|---|---|---|---|---|---|---|---|
ResNet-50 | 10.2 | 23.5 | 7.2 | 2.3 | 11.0 | 13.3 | 19.8 | |||
√ | 11.2 | 26.3 | 7.7 | 2.5 | 12.2 | 14.6 | 21.1 | |||
√ | 12.7 | 29.5 | 9.2 | 4.1 | 14.3 | 14.7 | 19.5 | |||
√ | 10.7 | 25.8 | 7.0 | 2.4 | 11.5 | 14.8 | 21.2 | |||
√ | √ | √ | 13.7 | 33.2 | 9.0 | 4.0 | 15.2 | 16.8 | 21.7 | |
RLANet-50 | 12.3 | 29.3 | 8.2 | 2.8 | 13.1 | 16.8 | 23.4 | |||
√ | 11.9 | 28.5 | 8.2 | 2.7 | 12.9 | 16.1 | 22.7 | |||
√ | 14.1 | 33.8 | 9.7 | 5.1 | 15.6 | 17.9 | 22.1 | |||
√ | 11.2 | 27.3 | 7.3 | 2.5 | 11.7 | 15.9 | 24.3 | |||
√ | √ | √ | 14.9 | 36.5 | 9.8 | 4.4 | 16.3 | 18.8 | 22.9 |
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