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Implementation of Digital Image Watermarking using Discrete Fractional Fourier Transform

Author(s):

Patel Mohit B , GTU PG School; Kunal R.Patel, Saffrony Institute of Technology

Keywords:

FRFT, DRFT, DWT, DFT, DCT, FFT, Digital Image Watermarking, Watermark Decoder, Watermark embedder, Frequency Domain, Spatial Domain

Abstract

Usage of digital media has witnessed a wonderful growth during the last decades, as a result of their notable benefits in efficient storage, ease of manipulation and transmission. In the last five years the protection of digital information has received significant attention within the digital media community, and a number of techniques that try to address the problem by hiding appropriate information within digital media have been proposed. Image Security persists in many operational contexts till up this day: an encrypted e-mail message between an employee of a defines contractor and the embassy of aggressive power, for example, may have obvious implications. So the study of communications security includes not just encryption but also traffic security, whose essence lies in hiding information. Data information hiding is a multidisciplinary discipline that combines image and signal processing with cryptography, communication theory, coding theory, signal compression, and the theory of visual and audio perception. One of the more interesting sub disciplines of information hiding is steganography. Differently from cryptography that is about protecting the content of messages steganography is about concealing their existence. Several techniques to hide information are presented, terminology and possible related attacks, with specific attention on steganography and copyright schemes. In my major work describes a watermark embedding technique for images using discrete fractional Fourier transform. The idea is that a discrete fractional Fourier transform of the image is computed, the robust watermark and fragile watermark embed in the fractional Fourier transform (FRFT) domain of the image, and the watermark position and the transform order are used as the encryption keys. My proposed results indicate the embedded watermark is perceptually invisible and robust also compare with the discrete Fourier transform based method along with various image processing operations.

Other Details

Paper ID: IJSRDV3I30879
Published in: Volume : 3, Issue : 3
Publication Date: 01/06/2015
Page(s): 1060-1064

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