Text compression
On the Length of Programs for Computing Finite Binary Sequences
Journal of the ACM (JACM)
Content-based image retrieval with the normalized information distance
Computer Vision and Image Understanding
Complexity Based Image Artifact Detection
DCC '08 Proceedings of the Data Compression Conference
Paper: Modeling by shortest data description
Automatica (Journal of IFAC)
On the Complexity of Finite Sequences
IEEE Transactions on Information Theory
Least squares quantization in PCM
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
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Detecting unknown repeated patterns that appear multiple times in a digital image is a great challenge. We have addressed this problem in a recent work and we have shown that, using a compression based approach, it is possible to find exact repetitions. In this work, we continue this study, introducing a procedure for detecting unknown repeated patterns that occur in a close vicinity. We use finite-context modelling to pinpoint the possible locations of the repetitions, by exploring the connection between lossless image compression and image complexity. Since repetitions are associated to low complexity regions, the repeating patterns are revealed and easily detected. The experimental results show that the proposed approach provides increased ability to eliminate false positives.