arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.02663cs.LG
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通过对比学习使用伪标记将数据分离、视觉分离和分类器性能联系起来

Linking data separation, visual separation, and classifier performance using pseudo-labeling by contrastive learning

University of Campinas(坎皮纳斯大学);Utrecht University(乌得勒支大学)

Bárbara Caroline Benato, Alexandre Xavier Falcão, Alexandru-Cristian Telea

摘要:

缺乏监督数据是训练深度神经网络(DNN)时的一个问题,主要是在考虑监督成本高昂的医学和生物数据时。最近,嵌入式伪标签(EPL)通过使用从DNN的特征空间到2D空间的非线性投影(t-SNE),然后使用基于连接性的方法(OPFSemi)进行半监督标签传播来解决这个问题。我们认为,最终分类器的性能取决于数据分离存在于潜在空间和视觉分离存在于投影。我们首先提出使用对比学习产生的潜在空间EPL的两种方法(Simplified和SupCon)和它们的组合,其次通过显示,通过一组广泛的实验,上述数据分离,视觉分离和分类器性能之间的相关性。我们证明了我们的研究结果的分类,只有1%的监督样本的人类肠道寄生虫的五个现实世界的挑战性的图像数据集。

英文摘要:

Lacking supervised data is an issue while training deep neural networks (DNNs), mainly when considering medical and biological data where supervision is expensive. Recently, Embedded Pseudo-Labeling (EPL) addressed this problem by using a non-linear projection (t-SNE) from a feature space of the DNN to a 2D space, followed by semi-supervised label propagation using a connectivity-based method (OPFSemi). We argue that the performance of the final classifier depends on the data separation present in the latent space and visual separation present in the projection. We address this by first proposing to use contrastive learning to produce the latent space for EPL by two methods (SimCLR and SupCon) and by their combination, and secondly by showing, via an extensive set of experiments, the aforementioned correlations between data separation, visual separation, and classifier performance. We demonstrate our results by the classification of five real-world challenging image datasets of human intestinal parasites with only 1% supervised samples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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