论文标题
在功能归一化和数据增强上
On Feature Normalization and Data Augmentation
论文作者
论文摘要
在训练图像识别模型时,通常将潜在特征的矩(均值,平均值和标准偏差)作为噪声去除,以提高稳定性并减少训练时间。但是,在图像产生的领域中,时刻起着更为重要的作用。研究表明,从实例归一化和位置归一化中提取的力矩可以大致捕获图像的样式和形状信息。这些时刻没有被丢弃,而是对生成过程的发挥作用。在本文中,我们提出了Moment Exchange,这是一种隐含的数据增强方法,该方法鼓励该模型也将MONK信息也用于识别模型。具体而言,我们用另一个训练图像的学习图像的学术特征的时刻替换为另一个训练图像,并插入目标标签 - 迫使模型除了归一化特征之外从矩中提取训练信号。由于我们的方法快速,完全在特征空间中运行,并且与先前方法混合了不同的信号,因此可以有效地将其与现有的增强方法相结合。我们证明了它在几个识别基准数据集中的功效,在这些数据集中,它提高了具有显着一致性的高度竞争性基线网络的概括能力。
The moments (a.k.a., mean and standard deviation) of latent features are often removed as noise when training image recognition models, to increase stability and reduce training time. However, in the field of image generation, the moments play a much more central role. Studies have shown that the moments extracted from instance normalization and positional normalization can roughly capture style and shape information of an image. Instead of being discarded, these moments are instrumental to the generation process. In this paper we propose Moment Exchange, an implicit data augmentation method that encourages the model to utilize the moment information also for recognition models. Specifically, we replace the moments of the learned features of one training image by those of another, and also interpolate the target labels -- forcing the model to extract training signal from the moments in addition to the normalized features. As our approach is fast, operates entirely in feature space, and mixes different signals than prior methods, one can effectively combine it with existing augmentation approaches. We demonstrate its efficacy across several recognition benchmark data sets where it improves the generalization capability of highly competitive baseline networks with remarkable consistency.