Capacity Issues In Image Watermarking

being attacked, encrypt it with a secret key to obtain an encrypted bit stream . For that AES encryption is used. After AES encryption, will embed at the fourth bit position of . Some related information about the mosaic image generation process into the mosaic image for use in the secret image recovery process are also embed at the last fourth bit position of . Such information, described as a bit stream I like M, includes the following data items: 1) encryption key; and 2) total length of before encryption. After all this process Target image with mosaic image, residual value and all information that required to recover original image are transmitted to receiver

Digital modification of photos present in magazines or advertisements has become a habitual practice of 21st century photographers. The present work's purpose is to present an ambivalent account of the existing controversy surrounding photographic enhancement, by focusing on the artful or inspiring aspects together with analyzing its potentially harmful and dishonest nature.

Images that have been photoshopped using software such as Adobes photoshop program should carry watermarks. Many of the image photoshopped are just for practical jokes, but some are for more spurious reasons. Most of the photoshopping occurs on magazines or in hollywood to make actors or models to look close to perfect.

As with the improvement of cameras that produce high quality videos and images, storage needed to store the videos is became a big issue especially for the film makers that have huge video files to store. Thus we need a mechanism that make the videos compact so that they efficiently store on the hard drives and other storage devices. Here comes the compression techniques that makes it possible to remove the redundancy from bit stream of video files so they take less place to be stored. Transmission of video files is also a big reason that describes the importance of video compression in more prominent way. We need to transmit high quality videos over the internet connection of limited bandwidth. Thus to utilize this limited bandwidth efficiently

Over the years, a lot of hoaxes are spreading on the internet. May it be, news, celebrity issues and the most prominent are photography. Anyone who has knowledge in altering digital image can easily create interesting photos and can diffuse over the net in just a snap. Somehow, most of them are very difficult to distinguish which is real and which is not. Due to advanced technology, we can now easily identify fakes from the real one.

IndexTerms---Compression rate (CR), Peak signal to noise ratio (PSNR), Mean square error (MSE), Joint photographic expert group (JPEG2000), Singular value decomposition (SVD), Wavelet Difference Reduction (WDR).

Photo Authenticity – the true essence of photography remains realism even as artistry and creativity continues to stake its claim. The desire to capture inspiring, authentic images has never been lost. This is all thanks to the people’s sense of belonging and need to associate with the familiar. One way to prove authenticity through photo shoot is to capture images or portraits that depict emotions or bring out stories. It is unlikely that the desire to bring out authenticity will not be fazed by a few alterations and retouching using software photo editors, filters and cameras to bring out the very best in photography. With photo authenticity gaining root, real people will be cast in the same manner as models and artists. For example, authenticity in portrait photography will remain firmly entrenched in the skin, body and emotions.

video file without a degradation of quality. The technology used provides high quality video image while conserving hard drive storage space.

A multi-resolution watermarking method based on the discrete wavelet transform for copyright protection of digital images was presented by Zolghadrasli and S. Rezazadeh [21]. The watermark employed was a noise type Gaussian sequence. Watermark components were added to the significant coefficients of each selected sub band by considering the human visual system in order to embed the watermark robustly and imperceptibly. They enhanced the HVS model by performing some small modifications. The extraction of the watermark involved the host image. They measured the similarities of extracted watermarks using the Normalized Correlation Function. The robustness of their method against wide variety of attacks was illustrated.

Steganography is the practice of concealing a file, message, and important information of any format as text, image, audio or video within another file, message, of any format. Steganography is the art of hiding the information in some other host object and it has been used since ancient time by the people. In ancient time, secret information is hidden in the back of wax, scalp of the slaves, in rabbits etc. The word steganography used from the past combines the Greek words steganos, meaning "covered, concealed, or protected", and graphein meaning "writing" [1]

Abstract- The utilization of PC systems for information transmissions has made the need of security. The security of this intuitive media data should be possible with encryption or information concealing calculations. To diminish the transmission time, the information pressure is necessary. Since couple of years, an issue is to attempt to join pressure, encryption and information covering up in a solitary stride. Picture security turns out to be progressively critical for some applications, e.g., secret transmission, video reconnaissance, military and therapeutic applications. These days, the transmission of pictures is an every day routine and it is important to locate a proficient approach to transmit them over systems. They send Secret message over channel utilizing Cryptography and Steganography calculations by AES (Advanced Encryption Standard). It is utilized to scramble the information from plain content to figure content the other way around. There are two sorts of keys accessible in the cryptography, symmetric and asymmetric. There are utilizing symmetric key which is separated into two key, for example, private and open key. Open key is utilized for encryption and private key is utilized for decoding. The reversible information concealing method is utilized to recover the information and picture

To retain images of identity source documents in electronic storage in a transferable format, technology should be employed to capture digital images.

enhance a digital image without spoiling it. The enhancement methods can broadly be divided in to the following two categories [1]:

Abstract— Steganography is a technique of hiding the secret information. Steganography hides the existence of the secret data and make the communication undetectable. Secret data can be communicated in an appropriate multimedia carrier such as image, audio or video. Image steganography is extensively used technique. In this technique secret data is embedded within the image. Steganography techniques can be categorized into two groups - adaptive and non-adaptive. Each of these have its strengths and weaknesses. Adaptive steganography embeds the secret information in the image by adapting some of the local features of the image. Non-adaptive steganography embeds secret data equally in each and every pixel of the image. Several techniques have been proposed for hiding the

Ritchin, speculates on digital photography’s relationship to analog photography on space, time, light and authorship. His analysis, of the changes photography has undergone in technology and made easily available, like digital camera been absorbed in various other devises like telephones, refrigerators tables etc., and ultimately one day our skin. The challenges in taking various photos as different angles by amateurs would destroy the quality and genuineness of the picture. There would be no bias decision on what should or should not be made public to the world.