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On Tue, 26 Nov, 12:03 AM UTC
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Scientists Develop AI Tool That Generates Realistic Satellite Images of Future Flooding
Scientists have developed a new AI tool that lets users generate realistic satellite images of future flooding and prepare for approaching storms. Massachusetts Institute of Technology (MIT) scientists developed the groundbreaking AI tool that uses satellite imagery to predict the impact of future flooding. By combining generative AI with a physics-based flood model, the tool -- which is called the "Earth Intelligence Engine" creates realistic aerial images that depict how a region would look after a potential flooding event. The images "from the future" show where flooding is likely to occur given the strength of an oncoming storm. According to an MIT news release, the team applied the method to Houston as a test case and generated satellite images depicting what certain locations around the city would look like after a storm comparable to Hurricane Harvey in 2017. The team compared these generated images with actual satellite images taken of the same regions after Harvey hit. They also analyzed AI-generated images that did not incorporate a physics-based flood model. The team's physics-enhanced approach produced satellite images of future flooding that were both more realistic and accurate. In contrast, the AI-only method created flood images in areas where flooding is physically impossible. To apply this method to other regions, the AI tool will require training on a significantly larger dataset of satellite images to understand how flooding manifests in different areas. The MIT researchers revealed the results of the AI tool in a study published in the journal IEEE Transactions on Geoscience and Remote Sensing this month. The team has also made the Earth Intelligence Engine available as an online resource for others to try. "The idea is: One day, we could use this before a hurricane, where it provides an additional visualization layer for the public," Björn Lütjens, a postdoctoral researcher in MIT's Department of Earth, Atmospheric and Planetary Sciences, says in a statement. "One of the biggest challenges is encouraging people to evacuate when they are at risk. Maybe this could be another visualization to help increase that readiness."
[2]
New AI tool generates realistic satellite images of future flooding
Visualizing the potential impacts of a hurricane on people's homes before it hits can help residents prepare and decide whether to evacuate. MIT scientists have developed a method that generates satellite imagery from the future to depict how a region would look after a potential flooding event. The method combines a generative artificial intelligence model with a physics-based flood model to create realistic, birds-eye-view images of a region, showing where flooding is likely to occur given the strength of an oncoming storm. As a test case, the team applied the method to Houston and generated satellite images depicting what certain locations around the city would look like after a storm comparable to Hurricane Harvey, which hit the region in 2017. The team compared these generated images with actual satellite images taken of the same regions after Harvey hit. They also compared AI-generated images that did not include a physics-based flood model. The team's physics-reinforced method generated satellite images of future flooding that were more realistic and accurate. The AI-only method, in contrast, generated images of flooding in places where flooding is not physically possible. The team's method is a proof-of-concept, meant to demonstrate a case in which generative AI models can generate realistic, trustworthy content when paired with a physics-based model. In order to apply the method to other regions to depict flooding from future storms, it will need to be trained on many more satellite images to learn how flooding would look in other regions. "The idea is: One day, we could use this before a hurricane, where it provides an additional visualization layer for the public," says Björn Lütjens, a postdoc in MIT's Department of Earth, Atmospheric and Planetary Sciences, who led the research while he was a doctoral student in MIT's Department of Aeronautics and Astronautics (AeroAstro). "One of the biggest challenges is encouraging people to evacuate when they are at risk. Maybe this could be another visualization to help increase that readiness." To illustrate the potential of the new method, which they have dubbed the "Earth Intelligence Engine," the team has made it available as an online resource for others to try. The researchers report their results today in the journal IEEE Transactions on Geoscience and Remote Sensing. The study's MIT co-authors include Brandon Leschchinskiy; Aruna Sankaranarayanan; and Dava Newman, professor of AeroAstro and director of the MIT Media Lab; along with collaborators from multiple institutions. Generative adversarial images The new study is an extension of the team's efforts to apply generative AI tools to visualize future climate scenarios. "Providing a hyper-local perspective of climate seems to be the most effective way to communicate our scientific results," says Newman, the study's senior author. "People relate to their own zip code, their local environment where their family and friends live. Providing local climate simulations becomes intuitive, personal, and relatable." For this study, the authors use a conditional generative adversarial network, or GAN, a type of machine learning method that can generate realistic images using two competing, or "adversarial," neural networks. The first "generator" network is trained on pairs of real data, such as satellite images before and after a hurricane. The second "discriminator" network is then trained to distinguish between the real satellite imagery and the one synthesized by the first network. Each network automatically improves its performance based on feedback from the other network. The idea, then, is that such an adversarial push and pull should ultimately produce synthetic images that are indistinguishable from the real thing. Nevertheless, GANs can still produce "hallucinations," or factually incorrect features in an otherwise realistic image that shouldn't be there. "Hallucinations can mislead viewers," says Lütjens, who began to wonder whether such hallucinations could be avoided, such that generative AI tools can be trusted to help inform people, particularly in risk-sensitive scenarios. "We were thinking: How can we use these generative AI models in a climate-impact setting, where having trusted data sources is so important?" Flood hallucinations In their new work, the researchers considered a risk-sensitive scenario in which generative AI is tasked with creating satellite images of future flooding that could be trustworthy enough to inform decisions of how to prepare and potentially evacuate people out of harm's way. Typically, policymakers can get an idea of where flooding might occur based on visualizations in the form of color-coded maps. These maps are the final product of a pipeline of physical models that usually begins with a hurricane track model, which then feeds into a wind model that simulates the pattern and strength of winds over a local region. This is combined with a flood or storm surge model that forecasts how wind might push any nearby body of water onto land. A hydraulic model then maps out where flooding will occur based on the local flood infrastructure and generates a visual, color-coded map of flood elevations over a particular region. "The question is: Can visualizations of satellite imagery add another level to this, that is a bit more tangible and emotionally engaging than a color-coded map of reds, yellows, and blues, while still being trustworthy?" Lütjens says. The team first tested how generative AI alone would produce satellite images of future flooding. They trained a GAN on actual satellite images taken by satellites as they passed over Houston before and after Hurricane Harvey. When they tasked the generator to produce new flood images of the same regions, they found that the images resembled typical satellite imagery, but a closer look revealed hallucinations in some images, in the form of floods where flooding should not be possible (for instance, in locations at higher elevation). To reduce hallucinations and increase the trustworthiness of the AI-generated images, the team paired the GAN with a physics-based flood model that incorporates real, physical parameters and phenomena, such as an approaching hurricane's trajectory, storm surge, and flood patterns. With this physics-reinforced method, the team generated satellite images around Houston that depict the same flood extent, pixel by pixel, as forecasted by the flood model. "We show a tangible way to combine machine learning with physics for a use case that's risk-sensitive, which requires us to analyze the complexity of Earth's systems and project future actions and possible scenarios to keep people out of harm's way," Newman says. "We can't wait to get our generative AI tools into the hands of decision-makers at the local community level, which could make a significant difference and perhaps save lives." The research was supported, in part, by the MIT Portugal Program, the DAF-MIT Artificial Intelligence Accelerator, NASA, and Google Cloud.
[3]
New AI tool generates realistic satellite images of future flooding
Credits: Credit: Pre-flood images from Maxar Open Data Program via Gupta et al., CVPR Workshop Proceedings. Generated images from Lütjen et al., IEEE TGRS. Visualizing the potential impacts of a hurricane on people's homes before it hits can help residents prepare and decide whether to evacuate. MIT scientists have developed a method that generates satellite imagery from the future to depict how a region would look after a potential flooding event. The method combines a generative artificial intelligence model with a physics-based flood model to create realistic, birds-eye-view images of a region, showing where flooding is likely to occur given the strength of an oncoming storm. As a test case, the team applied the method to Houston and generated satellite images depicting what certain locations around the city would look like after a storm comparable to Hurricane Harvey, which hit the region in 2017. The team compared these generated images with actual satellite images taken of the same regions after Harvey hit. They also compared AI-generated images that did not include a physics-based flood model. The team's physics-reinforced method generated satellite images of future flooding that were more realistic and accurate. The AI-only method, in contrast, generated images of flooding in places where flooding is not physically possible. The team's method is a proof-of-concept, meant to demonstrate a case in which generative AI models can generate realistic, trustworthy content when paired with a physics-based model. In order to apply the method to other regions to depict flooding from future storms, it will need to be trained on many more satellite images to learn how flooding would look in other regions. "The idea is: One day, we could use this before a hurricane, where it provides an additional visualization layer for the public," says Björn Lütjens, a postdoc in MIT's Department of Earth, Atmospheric and Planetary Sciences, who led the research while he was a doctoral student in MIT's Department of Aeronautics and Astronautics (AeroAstro). "One of the biggest challenges is encouraging people to evacuate when they are at risk. Maybe this could be another visualization to help increase that readiness." To illustrate the potential of the new method, which they have dubbed the "Earth Intelligence Engine," the team has made it available as an online resource for others to try. The researchers report their results today in the journal IEEE Transactions on Geoscience and Remote Sensing. The study's MIT co-authors include Brandon Leshchinskiy; Aruna Sankaranarayanan; and Dava Newman, professor of AeroAstro and director of the MIT Media Lab; along with collaborators from multiple institutions. Generative adversarial images The new study is an extension of the team's efforts to apply generative AI tools to visualize future climate scenarios. "Providing a hyper-local perspective of climate seems to be the most effective way to communicate our scientific results," says Newman, the study's senior author. "People relate to their own zip code, their local environment where their family and friends live. Providing local climate simulations becomes intuitive, personal, and relatable." For this study, the authors use a conditional generative adversarial network, or GAN, a type of machine learning method that can generate realistic images using two competing, or "adversarial," neural networks. The first "generator" network is trained on pairs of real data, such as satellite images before and after a hurricane. The second "discriminator" network is then trained to distinguish between the real satellite imagery and the one synthesized by the first network. Each network automatically improves its performance based on feedback from the other network. The idea, then, is that such an adversarial push and pull should ultimately produce synthetic images that are indistinguishable from the real thing. Nevertheless, GANs can still produce "hallucinations," or factually incorrect features in an otherwise realistic image that shouldn't be there. "Hallucinations can mislead viewers," says Lütjens, who began to wonder whether such hallucinations could be avoided, such that generative AI tools can be trusted to help inform people, particularly in risk-sensitive scenarios. "We were thinking: How can we use these generative AI models in a climate-impact setting, where having trusted data sources is so important?" Flood hallucinations In their new work, the researchers considered a risk-sensitive scenario in which generative AI is tasked with creating satellite images of future flooding that could be trustworthy enough to inform decisions of how to prepare and potentially evacuate people out of harm's way. Typically, policymakers can get an idea of where flooding might occur based on visualizations in the form of color-coded maps. These maps are the final product of a pipeline of physical models that usually begins with a hurricane track model, which then feeds into a wind model that simulates the pattern and strength of winds over a local region. This is combined with a flood or storm surge model that forecasts how wind might push any nearby body of water onto land. A hydraulic model then maps out where flooding will occur based on the local flood infrastructure and generates a visual, color-coded map of flood elevations over a particular region. "The question is: Can visualizations of satellite imagery add another level to this, that is a bit more tangible and emotionally engaging than a color-coded map of reds, yellows, and blues, while still being trustworthy?" Lütjens says. The team first tested how generative AI alone would produce satellite images of future flooding. They trained a GAN on actual satellite images taken by satellites as they passed over Houston before and after Hurricane Harvey. When they tasked the generator to produce new flood images of the same regions, they found that the images resembled typical satellite imagery, but a closer look revealed hallucinations in some images, in the form of floods where flooding should not be possible (for instance, in locations at higher elevation). To reduce hallucinations and increase the trustworthiness of the AI-generated images, the team paired the GAN with a physics-based flood model that incorporates real, physical parameters and phenomena, such as an approaching hurricane's trajectory, storm surge, and flood patterns. With this physics-reinforced method, the team generated satellite images around Houston that depict the same flood extent, pixel by pixel, as forecasted by the flood model. "We show a tangible way to combine machine learning with physics for a use case that's risk-sensitive, which requires us to analyze the complexity of Earth's systems and project future actions and possible scenarios to keep people out of harm's way," Newman says. "We can't wait to get our generative AI tools into the hands of decision-makers at the local community level, which could make a significant difference and perhaps save lives." The research was supported, in part, by the MIT Portugal Program, the DAF-MIT Artificial Intelligence Accelerator, NASA, and Google Cloud.
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MIT researchers have created an AI-powered "Earth Intelligence Engine" that combines generative AI with physics-based flood models to produce accurate satellite images of potential future flooding, aiming to improve disaster preparedness and evacuation efforts.
Scientists at the Massachusetts Institute of Technology (MIT) have developed a groundbreaking AI tool called the "Earth Intelligence Engine" that generates realistic satellite images of potential future flooding. This innovative technology combines generative artificial intelligence with physics-based flood models to create accurate visualizations of how regions might look after flooding events 123.
The Earth Intelligence Engine utilizes a conditional generative adversarial network (GAN), a machine learning method that employs two competing neural networks. The first network generates synthetic images based on real satellite imagery before and after hurricanes, while the second network distinguishes between real and synthetic images. This adversarial process results in highly realistic generated images 23.
To enhance accuracy and prevent "hallucinations" (factually incorrect features), the researchers integrated a physics-based flood model into the AI system. This combination allows the tool to produce more trustworthy and physically plausible flood predictions 123.
The MIT team applied their method to Houston as a test case, generating satellite images depicting potential flooding scenarios comparable to Hurricane Harvey in 2017. They compared these AI-generated images with actual post-Harvey satellite imagery and found that their physics-enhanced approach produced more realistic and accurate results than AI-only methods 123.
The Earth Intelligence Engine has significant potential for improving disaster preparedness and evacuation efforts. By providing realistic visualizations of potential flooding, the tool could help:
Dr. Björn Lütjens, a postdoctoral researcher at MIT, emphasized the tool's potential impact: "One day, we could use this before a hurricane, where it provides an additional visualization layer for the public. One of the biggest challenges is encouraging people to evacuate when they are at risk. Maybe this could be another visualization to help increase that readiness" 123.
While the current version of the Earth Intelligence Engine is a proof-of-concept, the researchers aim to expand its capabilities. To apply the method to other regions and predict flooding from future storms, the AI will need training on a larger dataset of satellite images from various locations 23.
The MIT team has made the Earth Intelligence Engine available as an online resource for others to explore and test, demonstrating their commitment to open science and collaborative research 123.
Professor Dava Newman, the study's senior author, highlighted the importance of localized climate information: "Providing a hyper-local perspective of climate seems to be the most effective way to communicate our scientific results. People relate to their own zip code, their local environment where their family and friends live. Providing local climate simulations becomes intuitive, personal, and relatable" 23.
As climate change continues to increase the frequency and severity of extreme weather events, tools like the Earth Intelligence Engine could play a crucial role in helping communities prepare for and respond to potential disasters.
Reference
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Massachusetts Institute of Technology
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