alkalait
Joined 11 years ago
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10
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Aug 11
Recent submissions
Comment · 4 years ago
Hello. I'd like to share here a potentially valuable resource for those looking to understand how AI is transforming remote sensing, or get into the field of Earth Observation. (See also related Twitter thread: https://twitter.com/alkalait/status/1565710662658953222?s=20...).
Most of the images generated by satellites will never be seen by human eyes. There simply aren't enough humans on Earth to sift through the TBs of imagery acquired daily by satellites. Artificial Intelligence is revolutionising many sectors, including Earth Observation.
[Cover.](https://preview.redd.it/avrdtspt7am91.png?width=1449&format=...)
Our preprint of *State of AI for Earth Observation: a concise overview from sensors to applications* serves as an intro to
* sensors
* the core ideas in deep learning for EO, and the current state of research
* how and where AI is applied in EO
* where AI4EO is headed
* and the role of research and technology organisations.
You can download the preprint here (no sign-up needed): https://sa.catapult.org.uk/digital-library/white-paper-state...
EO, Remote Sensing, ML are all independent fields of study, with several textbooks dedicated to each. Despite this, the conglomeration of ML + Remote Sensing + EO (aka. AI4EO) raises basic questions that are rarely motivated in isolated fields. For example, how can we...
* tell what happens on Earth based on observations from space?
* allow data tell the story of a natural or anthropogenic phenomenon?
* meaningfully combine sensors of fundamentally different mechanics?
* place all data streams on the globe continuously and harmoniously?
* do all of the above, mindful of noise, errors and observation gaps?
* Finally, how do we walk away with knowledge of what we don’t yet know?
To appeal to all backgrounds, we have included a handy glossary and an acronym explainer.
[Glossary.](https://preview.redd.it/6do66r009am91.png?width=718&format=p...)
This work is now under peer-review. In the meantime instead of uploading it on arXiv, Satellite Applications Catapult (an Innovate UK center) is hosting it as a white paper (no sign-up needed). If you find it useful, please spread the word, or retweet this thread: https://twitter.com/alkalait/status/1565710662658953222?s=20...
Enjoy.
Comment · 6 years ago
Last week I published this article on Amnesty International's blog, co-authored with Amnesty's human rights researchers.
This is an example of AI helping to protect Human Rights. We discuss new results on satellite imagery of the highest resolution available commercially (Maxar) to help Amnesty track the extent of the Darfur genocide.
A lot of this work is credited to Julien Cornebise, Daniel Worrall, Micah Farfur, Milena Marin who started Decode-Darfur-1 (DD1) in 2017. (see paper published in NeurIPS 2018 AI for Social Good Workshop: https://aiforsocialgood.github.io/2018/pdfs/track1/80_aisg_n...). To Laure Delisle, ZL, Alex Kuefler who continued the project (DD2) in 2019. Buffy Price and I helped bring DD2 to the finish line.
We have no code yet publicly available, not a dataset to reproduce this study - main reasons being that training Maxar imagery come with permission for publicity only. That said, the backbone approach is based on a ResNet50 (pre-trained on ImageNet), so data licensing is the main blocker.
Happy to answer any questions.
Comment · 10 years ago
Getting the game state data means deciding a-priori what features the AI should learn on. The whole point of the deep learning paradigm is to allow a machine to learn such features that enable good prediction, visualization, generation (aka. hallucination), etc.
Instead, researchers have provided the raw feed input data to these agents with the hope that the learned features could be interpreted as game state data by humans.
Comment · 11 years ago
I'm a bit familiar with PyMC, but all it seems to do is Gibbs sampling, which mixes horribly compared to HMC.
How easy would the transition to PyStan be?
Comment · 11 years ago
That's because most were toy examples dealing with discrete distributions in a few dimensions. Granted, these are mathematically easier to deal with, but not representative of real-world scenarios.
Comment · 11 years ago
I enjoyed MMDS, but the lectures given by Ulman were painful to sit through. The man could simply not deliver a single sentence not read verbatim from a screen.
Until recently I was an Applied Research Scientist at Element AI in London, focusing on applications of ML and statistics that enable NGOs and nonprofits. I led the Super-Resolution research collaboration with Mila (Yoshua Bengio's lab), and was awarded by ESA for topping the PROBA-V Super-Resolution challenge.
I'm also a primary co-author of the first technical report written with Amnesty International, on the large-scale study of online abuse against women on Twitter.
Twitter: https://twitter.com/alkalait