论文标题
反gan:用残留的生成对抗网生成现实的反事实
CounteRGAN: Generating Realistic Counterfactuals with Residual Generative Adversarial Nets
论文作者
论文摘要
各个行业中机器学习模型的普遍性导致对模型可解释性的需求不断增长,并能够向用户提供有意义的求助。例如,希望改善诊断或贷款申请人寻求增加批准机会的患者。反事实可以通过识别输入扰动来帮助这方面,从而导致更理想的预测结果。有意义的反事实应该能够达到所需的结果,但也是现实,可行和有效的计算结果。当前的方法具有适度的可行性,但在现实主义和延迟方面受到严重限制。为了应对这些限制,我们将生成的对抗网(GAN)应用于反事实搜索。我们还引入了一种新型的残留gan(RGAN),该残留物(RGAN)有助于改善与常规gan相比的反事实现实主义和可行性。拟议的反gan方法利用RGAN和目标分类器来产生能够提供有意义追索权的反事实。对两个流行数据集的评估突出了反Gan如何克服现有方法的局限性,包括> 50倍至> 90,000x的延迟改善,使有意义的追索实时可用,适用于广泛的域。
The prevalence of machine learning models in various industries has led to growing demands for model interpretability and for the ability to provide meaningful recourse to users. For example, patients hoping to improve their diagnoses or loan applicants seeking to increase their chances of approval. Counterfactuals can help in this regard by identifying input perturbations that would result in more desirable prediction outcomes. Meaningful counterfactuals should be able to achieve the desired outcome, but also be realistic, actionable, and efficient to compute. Current approaches achieve desired outcomes with moderate actionability but are severely limited in terms of realism and latency. To tackle these limitations, we apply Generative Adversarial Nets (GANs) toward counterfactual search. We also introduce a novel Residual GAN (RGAN) that helps to improve counterfactual realism and actionability compared to regular GANs. The proposed CounteRGAN method utilizes an RGAN and a target classifier to produce counterfactuals capable of providing meaningful recourse. Evaluations on two popular datasets highlight how the CounteRGAN is able to overcome the limitations of existing methods, including latency improvements of >50x to >90,000x, making meaningful recourse available in real-time and applicable to a wide range of domains.