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Improved Techniques for Training Single-Image GANs

最近,人们对从单个图像而不是从大型数据集学习生成模型的潜力产生了兴趣。这项任务意义重大,因为它意味着生成模型可以用于无法收集大型数据集的领域。然而,训练一个能够仅从单个样本生成逼真图像的模型是一个难题。在这项工作中,我们进行了大量实验,以了解训练这些方法的挑战,并提出了一些最佳实践,我们发现这些实践使我们能够比以前的工作产生更好的结果。一个关键点是,与之前的单图像生成方法不同,我们以顺序的多阶段方式同时训练多个阶段,使我们能够用较少的阶段来学习提高图像分辨率的模型。与最近的最新基线相比,我们的模型训练速度快了六倍,参数更少,并且可以更好地捕捉图像的全局结构。

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cvpr目标检测_目标检测指标

Feature pyramids are a basic component in recognition systems for detecting objects at different scales. But recent deep learning object detectors have avoided pyramid representations, in part because they are compute and memory intensive. In this paper , we exploit the inherent multi-scale, pyramidal hierarchy of deep convolutional networks to construct feature pyramids with marginal extra cost. A topdown architecture with lateral connections is developed for building high-level semantic feature maps at all scales. This architecture, called a Feature Pyramid Network (FPN), shows significant improvement as a generic feature extractor in several applications. Using FPN in a basic Faster R-CNN system, our method achieves state-of-the-art singlemodel results on the COCO detection benchmark without bells and whistles, surpassing all existing single-model entries including those from the COCO 2016 challenge winners. In addition, our method can run at 6 FPS on a GPU and thus is a practical and accurate solution to multi-scale object detection. Code will be made publicly available.

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