A DCT-based Recoverable Image Authentication Technique
نویسندگان
چکیده
In this paper, a scheme that has tamper proofing and recovery abilities is proposed. With the specific DCT frequency coefficients taken as the characteristic values, which are embedded into the least significant bits of the image pixels, it is used to provide proof of image integrity. If the image is tampered, the embedded characteristic values that are affected will be changed accordingly and then detected. Then the corresponding original characteristic values can be acquired by the proposed recovery process to reconstruct the image.
منابع مشابه
Multilevel Image based Data Security using Combined Approach of Lsb_Dct Watermarking
Digital watermarking is a method which is used to verify texts, image, video etc. Watermarking Technique is not only used for Authentication, it’s also used for security, image protection, rights of documents. In this perspective experiment we used edge detection technique in watermarking for the purpose of highly authentication of image. Here we used combined approach of LSB-DCT watermarking f...
متن کاملAn Approach towards Designing a Robust DCT based Image Watermarking Framework against JPEG Compression
Ownership authentication and copyright protection of image has achieved a sharp attention due to easy and global availability of internet services. Illegal copying and misappropriation of digital image leads cyber crime in an epidemic form. Invisible watermarking technique is one of the leading solutions towards violation of ownership authentication problem without deteriorating the quality of ...
متن کاملHybrid DWT-DCT-Hash function based Digital Image Watermarking for Copyright Protection and Content Authentication of DubaiSat-2 Images
This paper presents a new technique for copyright protection and content authentication of satellite images. The novelty in the presented approach consists in designing a hybrid Discrete Wavelet Transform (DWT), Discrete Cosine Transform (DCT) and hash function based digital image watermarking. In this study, two watermarks are embedded in the cover image called robust copyright watermark and f...
متن کاملImage Authentication Technique in Frequency Domain based on Discrete Fourier Transformation (IATFDDFT)
In this paper a novel data embedding technique in frequency domain has been proposed using Discrete Fourier Transform (DFT) for image authentication and secured message transmission based on hiding a large volume of data into gray images. Image authentication is done by embedding message/image in frequency domain by choosing image blocks of size 2 × 2, called mask, from the source image in row ...
متن کاملA robust image authentication method distinguishing JPEG compression from malicious manipulation
Image authentication verifies the originality of an image by detecting malicious manipulations. Its goal is different from that of image watermarking, which embeds into the image a signature surviving most manipulations. Most existing methods for image authentication treat all types of manipulation equally (i.e., as unacceptable). However, some practical applications demand techniques that can ...
متن کامل