DESIGNING STEGANOGRAPHIC DISTORTION USING DIRECTIONAL FILTERS

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文件名称：DESIGNING STEGANOGRAPHIC DISTORTION USING DIRECTIONAL FILTERS
文件大小：205KB
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更新时间：2017-07-27 11:50:10
wow stegona adaptive This paper presents a new approach to defining additive steganographic distortion in the spatial domain. The change in the output of directional high-pass filters after changing one pixel is weighted and then aggregated using the reciprocal Hölder norm to define the individual pixel costs. In contrast to other adaptive embedding schemes, the aggregation rule is designed to force the embedding changes to highly textured or noisy regions and to avoid clean edges. Consequently, the new embedding scheme appears markedly more resistant to steganalysis using rich models. The actual embedding algorithmis realized using syndrome-trellis codes to minimize the expected distortion for a given payload.