Difference between revisions of "Explainable / Interpretable AI"

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** [[Bias and Variances]]
 
** [[Bias and Variances]]
 
** [[Train, Validate, and Test]]
 
** [[Train, Validate, and Test]]
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** [[Model Monitoring]]
 
* [[Visualization]]
 
* [[Visualization]]
 
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Revision as of 08:31, 5 September 2020

Youtube search... ...Google search


AI system produces results with an account of the path the system took to derive the solution/prediction - transparency of interpretation, rationale and justification. 'If you have a good causal model of the world you are dealing with, you can generalize even in unfamiliar situations. That’s crucial. We humans are able to project ourselves into situations that are very different from our day-to-day experience. Machines are not, because they don’t have these causal models. We can hand-craft them but that’s not enough. We need machines that can discover causal models. To some extend it’s never going to be perfect. We don’t have a perfect causal model of the reality, that’s why we make a lot of mistakes. But we are much better off at doing this than other animals.' Yoshua Benjio



Explainable Computer Vision with Grad-CAM

...try demonstrations

We propose a technique for producing "visual explanations" for decisions from a large class of CNN-based models, making them more transparent. Our approach - Gradient-weighted Class Activation Mapping (Grad-CAM), uses the gradients of any target concept, flowing into the final convolutional layer to produce a coarse localization map highlighting important regions in the image for predicting the concept. Grad-CAM is applicable to a wide variety of CNN model-families: (1) CNNs with fully-connected layers, (2) CNNs used for structured outputs, (3) CNNs used in tasks with multimodal inputs or reinforcement learning, without any architectural changes or re-training. We combine Grad-CAM with fine-grained visualizations to create a high-resolution class-discriminative visualization and apply it to off-the-shelf image classification, captioning, and visual question answering (VQA) models, including ResNet-based architectures. In the context of image classification models, our visualizations (a) lend insights into their failure modes, (b) are robust to adversarial images, (c) outperform previous methods on localization, (d) are more faithful to the underlying model and (e) help achieve generalization by identifying dataset bias. For captioning and VQA, we show that even non-attention based models can localize inputs. We devise a way to identify important neurons through Grad-CAM and combine it with neuron names to provide textual explanations for model decisions. Finally, we design and conduct human studies to measure if Grad-CAM helps users establish appropriate trust in predictions from models and show that Grad-CAM helps untrained users successfully discern a 'stronger' nodel from a 'weaker' one even when both make identical predictions. Grad-CAM: Visual Explanations from Deep Networks via Gradient-based Localization | R. Selvaraju, M. Cogswell, A. Das, R. Vedantam, D. Parikh, and D. Batra

Building powerful Computer Vision-based apps without deep expertise has become possible for more people due to easily accessible tools like Python, Colab, Keras, PyTorch, and Tensorflow. But why does a computer classify an image the way that it does? This is a question that is critical when it comes to AI applied to diagnostics, driving, or any other form of critical decision making. In this episode, I'd like to raise awareness around one technique in particular that I found called "Grad-Cam" or Gradient Class Activation Mappings. It allows you to generate a heatmap that helps detail what your model thinks the most relevant features in an image are that cause it to make its predictions. I'll be explaining the math behind it and demoing a code sample by fairyonice to help you understand it. I hope that after this video, you'll be able to implement it in your own project. Enjoy! | Siraj Raval

cat_dog.png cat_dog_242_gradcam.jpg cat_dog_242_guided_gradcam.jpg

Interpretable

Please Stop Doing "Explainable" ML: There has been an increasing trend in healthcare and criminal justice to leverage machine learning (ML) for high-stakes prediction applications that deeply impact human lives. Many of the ML models are black boxes that do not explain their predictions in a way that humans can understand. The lack of transparency and accountability of predictive models can have (and has already had) severe consequences; there have been cases of people incorrectly denied parole, poor bail decisions leading to the release of dangerous criminals, ML-based pollution models stating that highly polluted air was safe to breathe, and generally poor use of limited valuable resources in criminal justice, medicine, energy reliability, finance, and in other domains. Rather than trying to create models that are inherently interpretable, there has been a recent explosion of work on “Explainable ML,” where a second (posthoc) model is created to explain the first black box model. This is problematic. Explanations are often not reliable, and can be misleading, as we discuss below. If we instead use models that are inherently interpretable, they provide their own explanations, which are faithful to what the model actually computes. Stop Explaining Black Box Machine Learning Models for High Stakes Decisions and Use Interpretable Models Instead | Cynthia Rudin - Duke University

Domains

Government

AI AND TRUSTWORTHINESS -- Increasing trust in AI technologies is a key element in accelerating their adoption for economic growth and future innovations that can benefit society. Today, the ability to understand and analyze the decisions of AI systems and measure their trustworthiness is limited. Among the characteristics that relate to trustworthy AI technologies are accuracy, reliability, resiliency, objectivity, security, explainability, safety, and accountability. Ideally, these aspects of AI should be considered early in the design process and tested during the development and use of AI technologies. AI standards and related tools, along with AI risk management strategies, can help to address this limitation and spur innovation. ... It is important for those participating in AI standards development to be aware of, and to act consistently with, U.S. government policies and principles, including those that address societal and ethical issues, governance, and privacy. While there is broad agreement that these issues must factor into AI standards, it is not clear how that should be done and whether there is yet sufficient scientific and technical basis to develop those standards provisions. Plan Outlines Priorities for Federal Agency Engagement in AI Standards Development;


Healthcare

Interpretable Machine Learning for Healthcare

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