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A speeding up robust identification scheme for JPEG images is proposed in this paper. The aim of the identification is to robustly identify JPEG images that are generated from the same original image, under various compression conditions such as differences in compression ratios and initial quantization matrices. The conventional scheme that we focus on uses visually protected features to achieve...
Complete complementary code (CCC) is a family of spread spectrum sequences having ideal correlation properties. Digital watermarking techniques based on CCC have been proposed by the authors. It has been shown that the proposed digital watermarking has high payload capacity even in the blind detection case. An improvement of CCC-based digital watermarking scheme called HSA (host signal approximation)...
In this paper, we introduce a novel message hiding scheme for the purpose of authentication inside images. The hiding process is performed by means of insertion in the frequency domain of Discrete Cosine Transform. By employing a type of sequences with well-defined, low cross-correlation values to encode information, we were able to embed messages inside images. Furthermore, it is also possible to...
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