Andrew Liu

Google Research and Machine Intelligence


What IS Machine Learning?


I'm interested in solving challenging vision, graphics, and representation learning problems.

Projects



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Fighting Fake News: Image Splice Detection via Learned Self-Consistency

Paper

Minyoung Huh*, Andrew Liu*, Andrew Owens, Alexei A. Efros

Advances in photo editing and manipulation tools have made it significantly easier to create fake imagery. Learning to detect such manipulations, however, remains a challenging problem due to the lack of sufficient training data. In this paper, we propose a model that learns to detect visual manipulations from unlabeled data through self-supervision. Given a large collection of real photographs with automatically recorded EXIF metadata, we train a model to determine whether an image is self-consistent — that is, whether its content could have been produced by a single imaging pipeline. We apply this self-supervised learning method to the task of detecting and localizing image splices. Although the proposed model obtains state-of-the-art performance on several benchmarks, we see it as merely a step in the long quest for a truly general-purpose visual forensics tool.




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Rendering onto deformable surface using visible ink

Andrew Liu
Undergraduate final project for CS 194-26. Used SIFT Flow algorithm to project images onto an actively deforming surface.



About me

Contact me?
e-mail: andrew@ml.berkeley.edu