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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/8720


    Title: On using LSB matching function for data hiding in pixels
    Authors: Chan, Chi-Shiang
    Contributors: Department of Information Science and Applications
    Keywords: Cryptography;Image processing;Steganography;Data embedding;Data extraction;Data hiding;Embedding efficiency;Information hiding;LSB matching;Sequential images;Test images;XOR operation
    Date: 2009
    Issue Date: 2010-04-07 21:34:09 (UTC+8)
    Publisher: Asia University
    Abstract: The proposedmethod in this paper is based on the LSB matching function ofMielikainen for Steganography. However, there is a significant change with respect to Mielikainen's method in the use of the LSB matching function to compute secret bits. Melikainen extracts secret bits in pixel pairs: the first one is the LSB of the first pixel in a pixel pair and the other is computed by a LSB matching function applied to both pixels. The proposed method does not make any partition, but makes the sequential image processing: the current secret bit is always computed by a LSB matching function where the LSB matching function is modified using only an XOR operation. To make the data extraction compatible with data embedding, the proposed method modifies sparse pixels by adding/subtracting their value to/from one. In the experimental results, the values of embedding efficiency increase while the involved bits increase. Taking test images in the experiments, the numbers of modified pixels in the proposed method are always lower than those in Mielikainen's method.
    Relation: Fundamenta Informaticae 96(1-2):49-59
    Appears in Collections:[行動商務與多媒體應用學系] 期刊論文

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