Integrated Gradients (IG) is a commonly used feature attribution method for deep neural networks. While IG has many desirable properties, the method often produces spurious/noisy pixel attributions in regions that are not related to the predicted class when applied to visual models. While this has been previously noted, most existing solutions are aimed at addressing the symptoms by explicitly reducing the noise in the resulting attributions. In this work, we show that one of the causes of the problem is the accumulation of noise along the IG path. To minimize the effect of this source of noise, we propose adapting the attribution path itself -- conditioning the path not just on the image but also on the model being explained. We introduce Adaptive Path Methods (APMs) as a generalization of path methods, and Guided IG as a specific instance of an APM. Empirically, Guided IG creates saliency maps better aligned with the model's prediction and the input image that is being explained. We show through qualitative and quantitative experiments that Guided IG outperforms other, related methods in nearly every experiment.

本文提出了自适应路径方法（APM）以及其特例Guided IG方法，通过调整归因路径本身（而非仅减少结果中的噪声）来解决在视觉模型上应用Integrated Gradients方法产生噪声像素归因的问题，并实验证明其在几乎所有实验中优于其他相关方法，可以创建与模型预测和图像输入更加一致的显著性地图。

引导式集成梯度：一种用于去除噪声的自适应路径方法