Journal
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
Volume 38, Issue -, Pages 195-206Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jvcir.2016.03.005
Keywords
Splicing forgery; Multi-scale noise estimation; Noise level function; SLIC superpixels; Optimal Parameter Combination Searching (OPCS)
Funding
- Research Committee of the University of Macau [MYRG2015-00011-FST, MYRG2015-00012-FST]
- Science and Technology Development Fund of Macau SAR [008/2013/A1, 093-2014-A2]
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Noise discrepancies in multiple scales are utilized as indicators for image splicing forgery detection in this paper. Specifically, the test image is initially segmented into superpixels of multiple scales. In each individual scale, noise level function, which reflects the relation between noise level and brightness of each segment, is computed. Those segments not constrained by the noise level function are regarded as suspicious regions. In the final step, pixels appears in suspicious regions of each scale, after necessary morphological processing, are marked as spliced region(s). The Optimal Parameter Combination Searching (OPCS) Algorithm is proposed to determine the optimal parameters during the process. Two datasets are created for training the optimal parameters and to evaluate the proposed scheme, respectively. The experimental results show that the proposed scheme is effective, especially for the multi-objects splicing. In addition, the proposed scheme is proven to be superior to the existing state-of-the-art method. (C) 2016 Elsevier Inc. All rights reserved.
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