1. 论文：Deep Image Retrieval: Learning global representations for image search

实例检索级别

特点：

1. 三元组

2. RPN

3. MAC融合

4. shift + fc的解释

5. 直接用这个ID训练，而非类别

6. 数据集 landmark  选择  a set of about 192,000 images divided into 586 landmarks

7. 速度：encode approximately 5 high-resolution (i.e. 724 pixels for the largest side) images per second using a single Nvidia K40 GPU.