目录
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相关背景
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从传统方法到R-CNN
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从R-CNN到SPP
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Fast R-CNN
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Faster R-CNN
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YOLO
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SSD
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总结
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参考文献
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推荐链接
相关背景
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14年以来的目标检测方法(以R-CNN框架为基础或对其改进)
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从传统方法到R-CNN
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R-CNN的三大步骤:得到候选区域,用cnn提取特征,训练分类器(后两步放在一个网络中,用softmax做分类器也可以)
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从R-CNN到SPP
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SPP的两大优势:可变输入大小 + 各patch块之间卷积计算是共享的
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SPP的缺陷:multi-stage,训练和测试都比较慢
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Fast R-CNN
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Fast R-CNN通过ROI pooling(一层的SPP),multi-task等改进大大提高速度
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Faster R-CNN
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Faster R-CNN对于Fast R-CNN的改进在于把region proposal的步骤换成一个CNN网络(RPN)
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Faster R-CNN的两个base model: ZF,VGG16 (base model的中间conv输出即为要输入到RPN的那个feature map)
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Faster R-CNN的锚点anchor box
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YOLO
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SSD
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SSD的default box与faster r-cnn的anchor box的对比
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SSD的训练样本与groundTruth的匹配策略 + 损失函数
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总结
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从R-CNN → SPP → Fast R-CNN → Faster R-CNN → YOLO → SSD整体在准确率和速度上都在提高
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参考文献
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- Girshick, R., Donahue, J., Darrell, T., Malik, J.: Rich feature hierarchies for accurate object detection and semantic segmentation. In: CVPR. (2014)
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SPP
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- He, K., Zhang, X., Ren, S., Sun, J.: Spatial pyramid pooling in deep convolutional networks for visual recognition. In: ECCV. (2014)
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Fast R-CNN
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- Girshick, R.: Fast R-CNN. In: ICCV. (2015)
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Faster R-CNN
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- Ren, S., He, K., Girshick, R., Sun, J.: Faster R-CNN: Towards real-time object detection with region proposal networks. In: NIPS. (2015)
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YOLO
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- Redmon, J., Divvala, S., Girshick, R., Farhadi, A.: You only look once: Unified, real-time object detection. In: CVPR. (2016)
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SSD
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- W. Liu, D. Anguelov, D. Erhan, C. Szegedy, and S. Reed. SSD: Single shot multibox detector. arXiv:1512.02325v2, 2015
推荐链接
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Object detection methods (codes)
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所有目标检测方法的中文总结(博客)
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Faster RCNN的论文阅读
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YOLO的论文阅读
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R-FCN的论文阅读
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SSD的论文阅读
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