کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
470897 698573 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved modification direction methods
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
پیش نمایش صفحه اول مقاله
Improved modification direction methods
چکیده انگلیسی

The original exploiting modification direction (EMD) method proposed by Zhang and Wang is a novel data hiding technique which can achieve large embedding capacity with less distortion. The original EMD method can hide (2n+1)(2n+1)-ary numbers by modifying at most one least-significant bit (LSB) of nn pixel values. The proposed methods in this paper, 2-EMD and EMD-2, modify at most two pixels of the LSB values. Efficiency of the proposed methods is shown theoretically and through experiments. The 2-EMD and EMD-2 can hide even larger numbers than the EMD with similar distortion under the same conditions. This paper shows that the EMD-2 is much better than the EMD, and slightly better than 2-EMD when nn is 3, 4 and 5. The way to generate basis vector can be used for the generalization of the nn-EMD and EMD-nn where n>1n>1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Mathematics with Applications - Volume 60, Issue 2, July 2010, Pages 319–325
نویسندگان
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