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M.Tech / M.E / PhD Thesis | Electronics & Communication Engineering | India | Volume 3 Issue 6, June 2014

Skin based Data hiding in Images by Using Haar and db2 DWT Techniques

Swapnali Zagade | Smita Bhosale

Abstract: Communication of data by maintaining confidentiality is a major issue everywhere; so to increase the security a non conventional approach called steganography is proposed. Steganography is an art of hiding data within data [1; 2]. Steganography method used in this paper is based on biometrics. And the biometric feature used to implement steganography is skin tone region of images [1]. In general; Stego means covering and graphic means writing. Combining these two terms gives the meaning of steganography; i. e. covered writing [2]. Here secret data is embedded within skin region of image that will provide an excellent secure location for data hiding. For this skin tone detection is performed using HSV (Hue; Saturation and Value) color space. Additionally secret data embedding is performed using frequency domain approach - DWT (Discrete Wavelet Transform). In DWT Different techniques are used. Secret data is hidden in one of the high frequency sub-band of DWT by tracing skin pixels in that sub-band. Different steps of data hiding are applied by cropping an image interactively. Cropping results into an enhanced security than hiding data without cropping i. e. in whole image; so cropped region works as a key at decoding side. This study shows that by adopting an object oriented steganography mechanism; in the sense that; we track skin tone objects in image; we get a higher security. And also satisfactory PSNR (Peak- Signal-to-Noise Ratio) is obtained and MSE.

Keywords: Skin tone detection, B-Panel, Cropping, DWT Security, PSNR, MSE

Edition: Volume 3 Issue 6, June 2014,

Pages: 2276 - 2281