基于重组性高斯自注意力的视觉Transformer

赵亮; 周继开

doi:10.16383/j.aas.c220715

基于重组性高斯自注意力的视觉Transformer

doi: 10.16383/j.aas.c220715

赵亮^{1, 2,},
周继开^1,

1.
西安建筑科技大学信息与控制工程学院西安 710055
2.
陕西省岩土与地下空间工程重点实验室西安 710055

基金项目: 国家自然科学基金(51209167, 12002251), 陕西省自然科学基金(2019JM-474), 陕西省岩土与地下空间工程重点实验室开放基金(YT202004), 陕西省教育厅服务地方专项计划(22JC043)资助

详细信息

作者简介:
赵亮：西安建筑科技大学信息与控制工程学院教授. 主要研究方向为智能建筑检测, 计算机视觉和模式识别. 本文通信作者. E-mail: zhaoliang@xauat.edu.cn

周继开：西安建筑科技大学信息与控制工程学院硕士研究生. 主要研究方向为图像处理和目标检测. E-mail: m18706793699@163.com

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出版历程
- 收稿日期: 2022-09-10
- 录用日期: 2023-01-13
- 网络出版日期: 2023-08-24
- 刊出日期: 2023-09-26

Vision Transformer Based on Reconfigurable Gaussian Self-attention

ZHAO Liang^{1, 2
,},
ZHOU Ji-Kai^1
,

1.
College of Information and Control Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055
2.
Shaanxi Provincial Key Laboratory of Geotechnical and Underground Space Engineering, Xi＇an 710055

Funds: Supported by National Natural Science Foundation of China (51209167, 12002251), Natural Science Foundation of Shaanxi Province (2019JM-474), Open Fund Project of Key Laboratory of Geotechnical and Underground Space Engineering in Shaanxi Province (YT202004), and Shaanxi Provincial Department of Education Service Local Special Plan Project (22JC043)

More Information

Author Bio:
ZHAO Liang　Professor at College of Information and Control Engineering, Xi＇an University of Architecture and Technology. His research interest covers intelligent building detection, computer vision and pattern recognition. Corresponding author of this paper

ZHOU Ji-Kai　Master student at College of Information and Control Engineering, Xi＇an University of Architecture and Technology. His research interest covers image processing and object detection

摘要

摘要: 在目前视觉Transformer的局部自注意力中, 现有的策略无法建立所有窗口之间的信息流动, 导致上下文语境建模能力不足. 针对这个问题, 基于混合高斯权重重组(Gaussian weight recombination, GWR)的策略, 提出一种新的局部自注意力机制SGW-MSA (Shuffled and Gaussian window-multi-head self-attention), 它融合了3种不同的局部自注意力, 并通过GWR策略对特征图进行重建, 在重建的特征图上提取图像特征, 建立了所有窗口的交互以捕获更加丰富的上下文信息. 基于SGW-MSA设计了SGWin Transformer整体架构. 实验结果表明, 该算法在mini-imagenet图像分类数据集上的准确率比Swin Transformer提升了5.1%, 在CIFAR10图像分类实验中的准确率比Swin Transformer提升了5.2%, 在MS COCO数据集上分别使用Mask R-CNN和Cascade R-CNN目标检测框架的mAP比Swin Transformer分别提升了5.5%和5.1%, 相比于其他基于局部自注意力的模型在参数量相似的情况下具有较强的竞争力.
- Transformer /
- 局部自注意力 /
- 混合高斯权重重组 /
- 图像分类 /
- 目标检测
Abstract: In the current vision Transformer＇s local self-attention, the existing strategy cannot establish the information flow between all windows, resulting in the lack of context modeling ability. To solve this problem, this paper proposes a new local self-attention mechanism shuffled and Gaussian window-multi-head self-attention (SGW-MSA) based on the strategy of Gaussian weight recombination (GWR), which combines three different local self-attention forces, and reconstructs the feature map through GWR strategy, and extracts image features from the reconstructed feature map. The interaction of all windows is established to capture richer context information. This paper designs the overall architecture of SGWin Transformer based on SGW-MSA. The experimental results show that the accuracy of this algorithm in the mini-imagenet image classification dataset is 5.1% higher than that in the Swin Transformer, the accuracy in the CIFAR10 image classification experiment is 5.2% higher than that in the Swin Transformer, and the mAP using the Mask R-CNN and Cascade R-CNN object detection frameworks on the MS COCO dataset are 5.5% and 5.1% higher than that in the Swin Transformer, respectively. Compared with other models based on local self-attention, it has stronger competitiveness in the case of similar parameters.
- Transformer /
- local self-attention /
- Gaussian weight recombination (GWR) /
- image classification /
- objection detection

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图 1 现有局部自注意力方法

Fig. 1 Existing local self-attention methods

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图 2 局部自注意力组合

Fig. 2 Local self-attention combination

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图 3 SGWin Transformer整体架构

Fig. 3 Overall architecture of SGWin Transformer

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图 4 SGW-MSA局部自注意力示意图

Fig. 4 SGW-MSA local self-attention diagram

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图 5 GW-MSA局部自注意力示意图

Fig. 5 GW-MSA local self-attention diagram

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图 6 纵横向基础元素块示意图

Fig. 6 Schematic diagram of vertical and horizontal basic element block

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图 7 SGWin Transformer block结构示意图

Fig. 7 Structure diagram of SGWin Transformer block

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图 8 本文算法与Swin Transformer的热力图对比

Fig. 8 Comparison between the algorithm in this paper and the thermal diagram of Swin Transformer

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图 9 融合效果示意图

Fig. 9 Schematic diagram of fusion effect

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图 10 MS COCO检测结果或可视化

Fig. 10 MS COCO test results or visualization

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表 1 SGWin Transformer的超参数配置表

Table 1 Super parameter configuration table of SGWin Transformer

Stage	Stride	Layer	Parameter
1	4	Patch embed	$\begin{aligned} P_1 = 4\;\;\\ C_1 = 96\end{aligned}$
1	4	Transformer block	${\left[\begin{aligned} S_1 = 7\\H_1 = 3\\R_1 = 4\end{aligned}\right ]}\times{2}$
2	8	Patch merging	$\begin{aligned} P_2 = 2\;\;\;\\C_2 = 192\end{aligned}$
2	8	Transformer block	${\left[\begin{aligned} S_2 = 7\\H_2 = 6\\R_2 = 4\end{aligned}\right ]}\times{2}$
3	16	Patch merging	$\begin{aligned} P_3 = 2\;\;\;\\C_3 = 384\end{aligned}$
3	16	Transformer block	${\left[\begin{aligned} S_3 = 7\;\;\\H_3 = 12\\R_3 = 4\;\;\end{aligned}\right ]}\times{2}$
4	32	Patch merging	$\begin{aligned} p_4 = 2\;\;\;\\C_4 = 768\end{aligned}$
4	32	Transformer block	${\left[\begin{aligned} S_4 = 7\;\;\\H_4 = 24\\R_4 = 4\;\;\end{aligned}\right ]}\times{2}$

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表 2 基础元素块宽度消融实验对比

Table 2 Comparison of ablation experiments of basic element block width

$W_b$	$AP^b\;(\%)$	$AP^m\;(\%)$
1	34.2	31.9
2	34.9	32.5
3	35.8	33.2
4	36.3	33.7
5	35.5	32.4
6	34.7	32.0

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表 3 SGW-MSA消融实验结果

Table 3 SGW-MSA ablation experimental results

序号	方法	$AP^b\;(\%)$	$AP^m\;(\%)$
A	SW-MSA (baseline)	30.8	29.5
B	Shuffled W-MSA	33.6 (+2.8)	31.6 (+2.1)
C	B+VGW-MSA	34.9 (+1.3)	32.7 (+1.1)
D	C+HGW-MSA	36.3 (+1.4)	33.7 (+1.0)

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表 4 CIFAR10数据集上的Top1精度对比

Table 4 Top1 accuracy comparison on CIFAR10 dataset

算法	Top1准确率 (%)	Parameter (MB)
Swin Transformer	85.44	7.1
CSWin Transformer	90.20	7.0
CrossFormer	88.64	7.0
GG Transformer	87.75	7.1
Shuffle Transformer	89.32	7.1
Pale Transformer	90.23	7.0
SGWin Transformer	90.64	7.1

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表 5 mini-imagenet数据集上的Top1精度对比

Table 5 Top1 accuracy comparison on mini-imagenet dataset

算法	Top1准确率(%)	Parameter (MB)
Swin Transformer	67.51	28
CSWin Transformer	71.68	23
CrossFormer	70.43	28
GG Transformer	69.85	28
Shuffle Transformer	71.26	28
Pale Transformer	71.96	23
SGWin Transformer	72.63	28

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表 6 以Mask R-CNN为目标检测框架在MS COCO数据集上的实验结果

Table 6 Experimental results on MS COCO dataset based on Mask R-CNN

Backbone	Params (M)	FLOPs (G)	$AP^b\;(\%)$	$AP^b_{50}\;(\%)$	$AP^b_{75}\;(\%)$	$AP^m\;(\%)$	$AP^m_{50}\;(\%)$	$AP^m_{75}\;(\%)$
Swin	48	264	39.6	61.3	43.2	36.6	58.2	39.3
CSWin	42	279	42.6	63.3	46.9	39.0	60.5	42.0
Cross	50	301	41.3	62.7	45.3	38.2	59.7	41.2
GG	48	265	40.0	61.4	43.9	36.7	58.2	39.0
Shuffle	48	268	42.7	63.6	47.1	39.1	60.9	42.2
Focal	49	291	40.7	62.4	44.8	37.8	59.6	40.8
Pale	41	306	43.3	64.1	47.9	39.5	61.2	42.8
SGWin	48	265	45.1	66.0	49.9	40.8	63.5	44.2

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表 7 以Cascade R-CNN为目标检测框架在MS COCO数据集上的实验结果

Table 7 Experimental results on MS COCO dataset based on Cascade R-CNN

Backbone	Params(M)	FLOPs(G)	$AP^b\;(\%)$	$AP^b_{50}\;(\%)$	$AP^b_{75}\;(\%)$	$AP^m\;(\%)$	$AP^m_{50}\;(\%)$	$AP^m_{75}\;(\%)$
Swin	86	754	47.8	55.5	40.9	33.4	52.8	35.8
CSWin	80	757	40.7	57.1	44.5	35.5	55.0	38.3
Cross	88	770	39.5	56.9	43.0	34.7	53.7	37.2
GG	86	756	38.1	55.4	41.5	33.2	51.9	35.1
Shuffle	86	758	40.7	57.0	44.4	35.8	55.1	38.0
Focal	87	770	38.6	55.6	42.2	34.5	53.7	39.0
Pale	79	770	41.5	57.8	45.3	36.1	55.2	39.0
SGWin	86	756	42.9	60.9	46.3	37.8	57.2	40.5

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表 8 KITTI和PASCAL VOC数据集上的实验结果

Table 8 Experimental results on KITTI and PASCAL VOC dataset

Backbone	KITTI mAP@0.5:0.95	VOC mAP@0.5	Params (M)	FPS
Swin	57.3	59.6	14.4	50
CSWin	58.7	64.1	14.2	48
Cross	58.1	62.8	13.8	20
Shuffle	58.7	64.6	14.4	53
GG	57.8	62.4	14.4	46
Pale	58.9	64.5	14.2	48
SGWin	59.2	65.1	14.4	56

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