A review of digital image forensics

Image provides complete detailed information for thing or object. It is considered as an important aspect of analyzing the details of various objects or environments of real life applications. From analyzing or studying images, various techniques come into existence. These include zooming, watermarking, hazing, and compression. Each has its own advantages and disadvantages with respect to various implicit functions defined for the techniques. The research paper focuses on watermarking techniques. The techniques of watermarking have their advantages and outperforms better when combined with wavelets transformations (DWT) followed by interpolations. The wavelets and interpolations provide a good quality enhanced and zoomed watermarked images at the time of its encoding and decoding processes. The images are embedded with sample images considered as hidden information. After the extraction process image interpolation method is applied to the image to get a quality image. The process is suggested in order to view the changed pixels of images after encoding of two images. The combination of DWT watermarking and interpolation provides 52% better results when compared to existing techniques.

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Enhanced Image Watermarking Technique using Wavelets and Interpolation

A comprehensive survey of image and video forgery techniques: variants, challenges, and future directions

With the widespread use of Internet, transfer of digital data online is enormous. This leads to easy accessibility and vulnerability to attacks of copyrighted content on large scale. Digital data in form of videos, audios, text, images can easily be manipulated, forged and redistributed for profits. To overcome this problem and protect copyrighted content, Digital Watermarking emerged as a useful solution. This paper talks about the literature survey of different watermarking techniques and showcase the comparative description of superiority of one technique over the other.

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Analysis of Watermarking Techniques

Video watermarking is the process of embedding watermark in a video. Watermark in a video is embedding by extracting a frame from it and then applying certain techniques. Earlier the conventional techniques of video watermarking like transform domain were used. All the existing transformation techniques have various disadvantage like less robust to additive noise, localization was comparatively poor, not a good quality, less security, higher computation cost, higher frequency rate etc. The need of proposing new technique for video watermarking is to improve the quality and security of watermarked video. In the proposed scheme, lab color space conversion is used. To overcome the disadvantages of the conventional techniques and the security of the system and data compression needs to be improved, PSNR and SSIM should be increased using new technique and the BER should be decreased using this techniques. This proposed technique is considered to be better and the efficient than the traditional techniques of watermarking. Gernal Terms Video watermarking.

/pdf/an-efficient-video-watermarking-using-spatial-domain-and-lab-3t1sx8d6sz.pdf

An Efficient Video Watermarking using Spatial Domain and Lab Color Space

Digital Watermarking has emerged as a new area of research in an attempt to prevent illegal copying and duplication In this paper, I represent both methods ie DCT&DWT based algorithm for watermarking in digital images In order to compare the imperceptibility & robustness of the both algorithms make use of simple attacks such as resizing, rotation &cropping

http://ijsrp.org/research-paper-0213/ijsrp-p1498.pdf

K. S. Bapat

Papers

Comparative Analysis of Watermarking in Digital Images Using DCT & DWT