Identifying Image Composites Through Shadow Matte Consistency

@article{Liu2011IdentifyingIC,
  title={Identifying Image Composites Through Shadow Matte Consistency},
  author={Qiguang Liu and Xiaochun Cao and Chao Deng and Xiaojie Guo},
  journal={IEEE Transactions on Information Forensics and Security},
  year={2011},
  volume={6},
  pages={1111-1122}
}
In this paper, we propose a framework for detecting tampered digital images based on photometric consistency of illumination in shadows. In particular, we formulate color characteristics of shadows measured by the shadow matte value. The shadow boundaries and the penumbra shadow region in an image are first extracted. Then a simple and efficient method is used to estimate shadow matte values of shadows. Our approach efficiently extracts these constraints from a single view of a target scene and… CONTINUE READING
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