In general, sufficient data is essential for the better performance and generalization of deep-learning models. However, lots of limitations(cost, resources, etc.) of data collection leads to lack of enough data in most of the areas. In addition, various domains of each data sources and licenses also lead to difficulties in collection of sufficient data. This situation makes us hard to utilize not only the pre-trained model, but also the external knowledge. Therefore, it is important to leverage small dataset effectively for achieving the better performance. We applied some techniques in three aspects: data, loss function, and prediction to enable training from scratch with less data. With these methods, we obtain high accuracy by leveraging ImageNet data which consist of only 50 images per class. Furthermore, our model is ranked 4th in Visual Inductive Printers for Data-Effective Computer Vision Challenge.

为提高深度学习模型的性能和泛化能力，本论文提出了数据、损失函数和预测等三个方面的技术，以有效地利用小数据集进行训练。通过利用仅包含每类 50 张图像的 ImageNet 数据，我们取得了高准确率，并在“数据有效计算机视觉挑战”中排名第四。

使用数据增强、Focal Cosine Loss 和集合方法进行图像分类的高效深度学习方法