2015 International Conference on Information Processing (ICIP) Vishwakarma Institute of Technology. Dec 16-19, 2015
Data Embedding Technique Using Secret Fragment Visible Mosaic Image for Covered Communication Asawari S. Chavan
Amrita A. Manjrekar
Computer Science & Technology (M.Tech II) Department of Technology, Kolhapur Maharashtra, India
[email protected]
Computer Science & Technology (Assistant Professor) Department of Technology, Kolhapur Maharashtra, India
AbstractA
camouflage a secret message into a cover-media like image, audio, video such that an unintended observer will not be aware of the existence of the hidden message. In other words, data hiding is referred to as a process of linking two sets of data, a set of embedded data and another set of the cover media data. The relationship between these two sets of data characterizes different application. For instance, in covert communications, the hidden data may be often being irrelevant to the cover media. In digital watermarking or authentication, however, the embedded data are closely related to the cover media. In these two types of applications, the invisibility of hidden data is an important requirement. Non- photorealistic Rendering (NPR) is successful area of computing graphics and it is applied to many relevant contexts. Computer graphics research is rigorous on making photo-realistic images of artificial matter. These descriptions talk facade shading and curving, as well as the power full relations of objects in the scene. These renderings are traditionally represented by rectangular arrays of pixels that tile the image plane. An alternative photo-realism is feasible to produce conceptual images using a structured compilation of brush strokes. These conceptual images strain the color, shape, size, and direction of entity brush strokes, generalized paintings of computer created or photographic images can be easily created. Mosaic is a type of artwork, which is composing small fragments of targeted image. Mosaic is created decorative meaningful process picture which is shown in fig. 1. Four types of images, specifically crystallization mosaic, ancient mosaic, photo mosaic and puzzle image mosaic [1]. In the first two types of images are made by, the splitting of the source image is into tile image and then it is reconstructed by painting the tiles and they are named as tile mosaics. Photo mosaic, and puzzle image mosaic include obtaining target image and cover image those have been obtained with the help of databases. It is called as multi-picture mosaics. Crystallization mosaic uses a Voronoi diagram which was proposed by A. Hausner [15].
novel method is implemented based on information hiding for secure data communication. A new computer art image creates called secret fragment visible mosaic image. The Mosaic image is formed by the design of composing small fragments of a given secret image and selected target image, which appears in an arbitrarily selected target image and use of hiding of the secret image. Secret image and target image is divided into small fragments called tile image and target block respectively. Tile image is embedded in a similar target block based on color variation. Each tile image is transforming their color characteristic to corresponding target blocks using color transform algorithm so that the secret image may be retrieved nearly lossless. Secret image and target image are variable size, then resizing the target image. Customize metafile (CMF) contains the required information for retrieving the secret image. The text message is embedded into the border using the TBPC method. Calculate the hash value of generated the mosaic image. MD 5 hash algorithm is used to compute hash value, which provides integrity of secret data. The proposed method is possible for large volume and variable size of the secret image and target image. This method is feasible for secure and nearly lossless data embedding technique. KeywordsSecret fragment visible mosaic image, Color Transformation, Metafile, TBPC.
I. INTRODUCTION In the internet world, information security is a significant concern in transmission, storage of multimedia data. In this world various types of multimedia data such as image, audio, video are used frequently use and transmit data through the various applications, such as confidential enterprise archives, online personal photograph albums, medical imaging systems, document storage systems and military image databases. These data contain private or confidential information so that they can be protected from leakages during transmissions. Now a days numerous methods have been developed for secure data transmission, out of which two universal approaches are image encryption and data hiding. Image encryption makes apply for the usual assets of an image, such as high redundancy and robust spatial correspondence. The encryption technique protects unauthorized access to the data. The encrypted image is a noisy image such that nobody able to get the secret data without the correct key. Area of data security has driven increasing awareness in hiding data in digital media. Data hiding is a method of
Fig. 1: Mosaic image.
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