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To achieve more efficient detection of small traffic sign targets under complex urban street background conditions, this paper proposes an improved YOLOv5s algorithm. This enhancement is achieved by incorporating a Convolution Block Attention Module (CBAM) Spatial Channel Attention Mechanism, an Adaptive Spatial Feature Fusion (ASFF) module, and an improved loss function for detection boxes. The validation results on the TT100K traffic sign dataset demonstrate that the proposed algorithm achieves a mean Average Precision (mAP) of 84.5% in traffic sign recognition.
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为在复杂的城市街道背景条件下实现更为高效的交通标志小目标识别,提出了一种改进的YOLOv5s算法,通过引入卷积块注意模块(CBAM)空间通道注意力机制、自适应空间特征融合(ASFF)模块和改进检测框的损失函数进一步提升网络性能,TT100K交通标志数据集上的验证结果表明,所提出的改进算法的交通标志识别平均精度均值(mAP)达到84.5%。
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| 参数 | 配置 |
| 中央处理器(CPU) | 英特尔酷睿i7-11700 |
| 图形处理器(GPU) | 英伟达GeForce GTX 3090 |
| 系统 | Linux-Ubuntu20.04 |
| 编程语言 | Python |
| 随机存取内存(RAM)/GB | 24 |
| 统一计算设备架构(CUDA)版本 | CUDA11.3 |
| PyTorch版本 | PyTorch1.11 |
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验证环境参数
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| 参数 | 配置 |
| 中央处理器(CPU) | 英特尔酷睿i7-11700 |
| 图形处理器(GPU) | 英伟达GeForce GTX 3090 |
| 系统 | Linux-Ubuntu20.04 |
| 编程语言 | Python |
| 随机存取内存(RAM)/GB | 24 |
| 统一计算设备架构(CUDA)版本 | CUDA11.3 |
| PyTorch版本 | PyTorch1.11 |
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| 网络模型 | P | R | mAP@0.5 | F1分数 |
| YOLOv5s | 85.4 | 86.1 | 74.8 | 69.3 |
| YOLOv5s-CBAM | 91.8 | 95.4 | 82.1 | 79.0 |
| YOLOv5s-ASFF | 92.0 | 96.2 | 83.2 | 80.1 |
| YOLOv5s-CBAM-ASFF | 93.8 | 97.0 | 84.5 | 82.2 |
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消融试验结果 %
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| 网络模型 | P | R | mAP@0.5 | F1分数 |
| YOLOv5s | 85.4 | 86.1 | 74.8 | 69.3 |
| YOLOv5s-CBAM | 91.8 | 95.4 | 82.1 | 79.0 |
| YOLOv5s-ASFF | 92.0 | 96.2 | 83.2 | 80.1 |
| YOLOv5s-CBAM-ASFF | 93.8 | 97.0 | 84.5 | 82.2 |
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| 网络模型 | P | R | mAP@0.5 | F1分数 |
| SSD | 86.4 | 70.9 | 57.8 | 55.9 |
| CenterNet | 89.9 | 79.1 | 81.7 | 66.4 |
| YOLOv3 | 65.6 | 67.2 | 51.1 | 41.2 |
| YOLOv4 | 79.7 | 68.0 | 54.4 | 44.0 |
| YOLOv5s | 85.4 | 86.1 | 74.8 | 69.3 |
| YOLOv5s-CBAM-ASFF | 93.8 | 97.0 | 84.5 | 82.2 |
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对比试验结果 %
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| 网络模型 | P | R | mAP@0.5 | F1分数 |
| SSD | 86.4 | 70.9 | 57.8 | 55.9 |
| CenterNet | 89.9 | 79.1 | 81.7 | 66.4 |
| YOLOv3 | 65.6 | 67.2 | 51.1 | 41.2 |
| YOLOv4 | 79.7 | 68.0 | 54.4 | 44.0 |
| YOLOv5s | 85.4 | 86.1 | 74.8 | 69.3 |
| YOLOv5s-CBAM-ASFF | 93.8 | 97.0 | 84.5 | 82.2 |
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