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Improved Way of Image Stegnography for JPEG2000 Compression Standard by Using EBCOT

Author(s): Hemlata H. Patil#1, Prof. S. P. Hingway

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 5;
Start page: 1993;
Date: 2013;
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Keywords: Stegnography | JPEG2000 | DWT | EBCOT | Compression Ratio | Bit error rate | time

Stegnography is one of the techniques for hiding information. Generally the information is of various types like text, image, audio etc. While hiding information mainly three issues are very important. These issues are capacity, robustness, and security. In JPEG2000 it is necessary to enlarge the hiding capacity of compressed image because the available redundancy is very limited. Some problems may occur when an image is hidden within an image. These problems are redundancy evolution and bitstream truncation. These problems are overcome with two algorithms, i.e DWT (Discrete Wavelet Transform) and EBCOT (Embedded Block Coding Optimization Truncation). By using these algorithms the compression ratio of stego image is increased and bit loss of hidden image is decreased. The time is also calculated for encoder and decoder phase.
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