多尺度注意力学习的Faster R-CNN口罩人脸检测模型

doi:10.3969/j.issn.0258-2724.20210017

基金项目:国家自然科学基金（61871335）；中央高校基本业务费专项资金（2682020XG02，2682020ZT35）；国家重点研发计划（2020YFB1711902）

详细信息

作者简介:
李泽琛（1996—），男，博士研究生，研究方向为图像处理与模式识别，E-mail：Lizc@my.swjtu.edu.cn

通讯作者:
华泽玺（1968—），男，副教授，博士，研究方向为轨道交通智慧运维、传感器与智能检测、监测，E-mail：huazexi@163.com

中图分类号:TP391.41；TP183
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- 被引次数:0
出版历程
- 收稿日期:2021-01-11
- 修回日期:2021-07-07
- 网络出版日期:2021-07-16
- 刊出日期:2021-10-15

Masked Face Detection Model Based on Multi-scale Attention-Driven Faster R-CNN

摘要

摘要:针对在佩戴口罩等有遮挡条件下的人脸检测问题，提出了多尺度注意力学习的Faster R-CNN （MSAF R-CNN）人脸检测模型. 首先，为充分考虑人脸目标多尺度信息，相较于原始Faster R-CNN框架，引入Res2Net分组残差结构，获取更细粒度的特征表征；其次，基于空间-通道注意力结构改进的Res2Net模块，结合注意力机制自适应学习目标不同尺度特征；最后，为学习目标的全局信息并减轻过拟合现象，在模型顶端嵌入加权空间金字塔池化网络，采用由粗到细的方式进行特征尺度划分. 在AIZOO和FMDD两个人脸数据集上的实验结果表明：所提出MSAF R-CNN模型对佩戴口罩的人脸检测准确率分别达到90.37%和90.11%，验证了模型的可行性和有效性.
- 口罩人脸/
- 深度学习/
- 注意力机制/
- 多尺度学习/
- 特征融合/
- 目标检测
Abstract:For the purpose of masked face detection, a multi-scale attention-driven faster region-based convolutional neural network (MSAF R-CNN) model is proposed. First, given the Faster R-CNN model architecture and the multi-scale information of the face, Res2Net, a grouped-residual structure, is introduced to model more fine-grained features. Then, inspired by the attention mechanism, a novel spatial-channel attention Res2Net (SCA-Res2Net) module is developed to learn the multi-scale features adaptively. Finally, to further learn the global feature representation and ease the overfitting problem, the weighted spatial pyramid pooling network is embedded on the top of the model, which can segment the feature maps into different groups from finer to coarser scales. Experimental results on the AIZOO and FMDD datasets show that the accuracy of masked face detection with the proposed MSAF R-CNN model can reach 90.37% and 90.11%, respectively, thus verifying the feasibility and effectiveness of the proposed model.
- masked face/
- deep learning/
- attention mechanism/
- multi-scale learning/
- feature fusion/
- object detection

HTML全文

图 1Res2Net模块

Figure 1.Res2Net module

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图 2SCA-Res2Net模块

Figure 2.Structure of SCA-Res2Net module

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图 3WSPP-Net模块

Figure 3.Structure of WSPP-Net

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图 4MSAF R-CNN模型

注：BN —batch normalization

Figure 4.MSAF R-CNN model

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图 5数据集部分图像

Figure 5.Partial images of datasets

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表 1不同分组数实验结果

Table 1.Experimental results under different numbers of groups %

数据集	类别	分组数
数据集	类别	2	4	6	8	10
AIZOO	Face	90.43	90.32	90.11	89.92	90.10
	Mask	89.95	90.37	89.86	90.27	89.50
	mAP	90.19	90.35	89.99	90.10	89.80
FMDD	Face	86.21	87.27	86.17	86.50	86.17
	Mask	89.99	90.11	90.04	90.21	89.99
	mAP	88.10	88.69	88.10	88.35	88.08

下载: 导出CSV

表 2不同压缩比实验结果

Table 2.Experimental results under different compression ratios %

数据集	类别	压缩比
数据集	类别	10	12	14	16	18
AIZOO	Face	90.31	90.39	90.12	90.32	90.41
	Mask	89.79	90.08	90.20	90.37	89.87
	mAP	90.05	90.23	90.16	90.35	90.14
FMDD	Face	86.98	84.89	86.26	87.27	86.30
	Mask	89.90	89.68	90.25	90.11	89.86
	mAP	88.44	87.29	88.26	88.69	88.08

下载: 导出CSV

表 3WSPP-Net不同多尺度窗口大小实验结果

Table 3.Experimental results under different window sizes in WSPP-Net %

数据集	类别	窗口大小
数据集	类别	S1	S2	S3	S4
AIZOO	Face	90.08	90.32	90.32	90.38
	Mask	90.31	90.37	90.13	90.01
	mAP	90.20	90.35	90.22	90.19
FMDD	Face	86.51	87.27	86.56	86.45
	Mask	89.76	90.11	89.60	89.99
	mAP	88.14	88.69	88.08	88.22

下载: 导出CSV

表 4不同检测方法的性能

Table 4.Performance of different methods %

数据集	类别	模型 1	模型 2	模型 3	模型 4	MSAF R-CNN
AIZOO	Face	87.32	90.42	89.94	90.19	90.32
	Mask	78.15	89.84	89.71	89.99	90.37
	mAP	82.73	90.13	89.82	90.09	90.35
FMDD	Face	86.01	86.41	84.44	85.05	87.27
	Mask	77.95	90.01	89.94	90.10	90.11
	mAP	81.98	88.21	87.19	87.58	88.69

下载: 导出CSV

表 5消融实验结果

Table 5.Ablation experimental results of feature removal and fusion %

数据集	类别	模型 5	模型 6	模型 7	MSAF R-CNN
AIZOO	Face	90.43	89.92	90.40	90.32
	Mask	90.05	90.03	90.00	90.37
	mAP	90.24	89.97	90.20	90.35
FMDD	Face	85.13	86.01	86.23	87.27
	Mask	89.93	90.00	89.98	90.11
	mAP	87.53	88.01	88.10	88.69

下载: 导出CSV

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