Two Stage Color Image Steganography Using DCT (TSCIS-DCT)

  • Anirban Goswami
  • Dipankar Pal
  • Nabin Ghoshal
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 199)


In frequency domain steganography, use of color images for secret data hiding may prove to be a decisive innovation. The proposed concept uses two color images for hiding a color/gray authenticating message/image. The mathematical technique of Discrete Cosine Transform (DCT) is applied on each block of size 2x2 taken in row major order from three color planes (Red, Green & Blue) sequentially and from two carrier images alternatively. A single secret message/image bit is fabricated within the transformed real frequency component of each source image byte except the first frequency component of each mask. The first frequency component of each block is used for re-adjustment to maintain the quantum value positive, non-fractional in spatial domain and also to reduce the integrated noise due to embedding. The pseudorandom position of embedding and subsequent extraction is generated by a logical expression. Experimental results of this technique reveal more efficiency compared to other similar technique.


Image Authentication Digital Watermarking Steganography DCT IDCT MSE PSNR IF SSIM 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Dept. of Information TechnologyTechno IndiaKolkataIndia
  2. 2.Dept. of Computer Science and EngineeringTechno IndiaKolkataIndia
  3. 3.Dept. of Engineering and Technological StudiesUniversity of KalyaniKalyaniIndia

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