Image Copy Detection Based on DCT Ordinal and Block Median

Yi Gang Sun; Yu Yang; Jing Ya Liu

doi:10.4028/www.scientific.net/AMM.548-549.1072

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 548-549Image Copy Detection Based on DCT Ordinal and...

Image Copy Detection Based on DCT Ordinal and Block Median

Abstract:

As for highly repetitive image of Internet, a new image algorithm combined with DCT and block median method is designed. As there is a certain correlation between low-frequency coefficient of DCT and image scaling, the sequence vector of DCT coefficients is introduced with block median method to make up the defect of DCT processing for multi-channel image supplied. Through the combination of DCT and block median method, the recall and precision of new algorithm is over 95%. New algorithm works well in image scaling, resists well against watermarking attack and is able to detect the copy of target image fast and accurately from a large scale image datasets.

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Periodical:

Applied Mechanics and Materials (Volumes 548-549)

Pages:

1072-1075

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.548-549.1072

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Online since:

April 2014

Authors:

Yi Gang Sun, Yu Yang, Jing Ya Liu

Keywords:

Block Median, Content-Based Copy Detection, DCT, Sequence Vector of DCT Coefficients

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