论文标题
使用胶囊对抗网络进行少数族裔班级增强的数据学习不平衡
Imbalanced Data Learning by Minority Class Augmentation using Capsule Adversarial Networks
论文作者
论文摘要
图像数据集通常是不平衡的事实,对深度学习技术构成了巨大的挑战。在本文中,我们提出了一种通过融合两种并发方法,生成对抗网络(GAN)和胶囊网络来恢复不平衡图像中平衡的方法。在我们的模型中,生成和歧视性网络发挥了一种新颖的竞争游戏,其中发电机从多元概率分布中生成了针对特定类别的样品。我们模型的歧视者的设计方式是在识别真实和假样品的同时,还需要将类分配给输入。由于GAN方法需要在训练过程中进行完全观察到的数据,因此,当训练样本不平衡时,这些方法可能会产生类似的样本,从而导致数据过度拟合。通过在对抗性培训中共同提供同类组件中的所有可用信息来解决此问题。它通过将多数分布结构纳入新的少数族裔样本中,从而改善了不平衡数据的学习。此外,发电机接受功能匹配损耗功能的训练,以改善训练收敛。此外,防止产生异常值,并且不会影响多数级别的空间。评估表明我们提出的方法的有效性;特别是,与卷积式的胶囊相比,胶囊的合并有效地识别具有更少参数的高度重叠类。
The fact that image datasets are often imbalanced poses an intense challenge for deep learning techniques. In this paper, we propose a method to restore the balance in imbalanced images, by coalescing two concurrent methods, generative adversarial networks (GANs) and capsule network. In our model, generative and discriminative networks play a novel competitive game, in which the generator generates samples towards specific classes from multivariate probabilities distribution. The discriminator of our model is designed in a way that while recognizing the real and fake samples, it is also requires to assign classes to the inputs. Since GAN approaches require fully observed data during training, when the training samples are imbalanced, the approaches might generate similar samples which leading to data overfitting. This problem is addressed by providing all the available information from both the class components jointly in the adversarial training. It improves learning from imbalanced data by incorporating the majority distribution structure in the generation of new minority samples. Furthermore, the generator is trained with feature matching loss function to improve the training convergence. In addition, prevents generation of outliers and does not affect majority class space. The evaluations show the effectiveness of our proposed methodology; in particular, the coalescing of capsule-GAN is effective at recognizing highly overlapping classes with much fewer parameters compared with the convolutional-GAN.