Exploring Image and Video Steganography Based on DCT and Wavelet Transform

Exploring Image and Video Steganography Based on DCT and Wavelet Transform

Chantana Chantrapornchai, Jitdumrong Preechasuk
Copyright: © 2017 |Pages: 29
DOI: 10.4018/978-1-5225-2053-5.ch003
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Abstract

Steganography is one of the techniques used to communicate secret data through the cover media such as images, videos, audio, texts etc. In this work, we consider the algorithms of steganography based on DCT and wavelet transform. The aspects of media quality after hiding the information in the digital media are considered. Particularly, we compare the performance of the prototype algorithms, representing the DCT and wavelet-based image steganography algorithms respectively, using the PSNR, capacity, robustness and accuracy aspects. For video steganography, with various wavelet transforms, we compare the quality of the derived information, when frames are dropped and the effects of payload is studied. The application of using such steganography algorithm which can embed multiple messages, each of which requires a separate key is proposed. The application can estimate the capacity used and capacity remains for the given cover image and texts.
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Background

Steganography is a science that involves communicating secret data in a media. Figure 1 summarizes the fields in information hiding (Cheddad, Condell, Curram & McKevitt, 2010). It shows the relations between steganography, watermarking and cryptography. While watermarking focuses on copyrighting the media, the steganography emphasizes on the hiding message on the media (Stanescu, Borca, Groza & Stratulat, 2008). These techniques may be closed to each other while the metrics considered for both are different.

Figure 1.

Discipline of information hiding

978-1-5225-2053-5.ch003.f01
Cheddad, Condell, Curram, & McKevitt, 2010.
Figure 2.

Categories of media

978-1-5225-2053-5.ch003.f02
Cheddad, Condell, Curram, & McKevitt, 2010.
Figure 3.

Types of steganography

978-1-5225-2053-5.ch003.f03
Morkel, Eloff, & Oliveir, 2005.

The media for hiding message can be many kinds as shown in Figure 2 (Morkel, Eloff, & Oliveir, 2005). Also the hidden message may be of many kinds such as a text, an image, an audio file etc.

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