We propose a novel self-supervised semi-supervised learning approach for conditional Generative Adversarial Networks (GANs). Unlike previous self-supervised learning approaches which define pretext tasks by performing augmentations on the image space such as applying geometric transformations or predicting relationships between image patches, our approach leverages the label space. We train our network to learn the distribution of the source domain using the few labelled examples available by uniformly sampling source labels and assigning them as target labels for unlabelled examples from the same distribution. The translated images on the side of the generator are then grouped into positive and negative pairs by comparing their corresponding target labels, which are then used to optimise an auxiliary triplet objective on the discriminator's side. We tested our method on two challenging benchmarks, CelebA and RaFD, and evaluated the results using standard metrics including Frechet Inception Distance, Inception Score, and Attribute Classification Rate. Extensive empirical evaluation demonstrates the effectiveness of our proposed method over competitive baselines and existing arts. In particular, our method is able to surpass the baseline with only 20% of the labelled examples used to train the baseline.

该论文提出了一种基于标签空间的图像增强，新颖的自我监督学习方法，用于半监督条件生成网络，通过将少量有标签的示例中的标签赋给大量无标签的示例，构成训练集并优化辅助匹配损失，实现了对CelebA和RaFD两项挑战性基准测试的有效性评估，表明其优于竞争基线和现有方法。

MatchGAN：自监督半监督条件生成对抗网络