Abstract: Watermarking techniques are primarily used for copyright protection. A simple and robust watermark-like digital authentication scheme is proposed. This work has two major merits. First, the watermark used in the proposed authentication scheme is the same type used in the original image, e.g. grey level images. Second the proposed scheme meets the requirements for watermarking techniques. lllegal users cannot perceive and break the watermark signed from the original image. Furthermore, the signed watermark is robust ....etc

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3D Visualization In Computer Graphics

Abstract :

In the last several years, three-dimensional computer graphics has become a critical technology in the PC world. 3D graphics capability is a prerequisite for two major markets: Computer-aided industrial and mechanical design (for which the majority of workstations and high-end PCs are sold today) and entertainment (especially computer games, which are driving significant new PC hardware and software purchases by consumers).


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INTRODUCTION

There are various applications that require a 3D world to be simulated as realistically as possible on a computer screen. These include 3D animations in games, movies and other real world simulations. It takes a lot of computing power to represent a 3D world due to the great amount of information that must be used to generate a realistic 3D world and the complex mathematical operations that must be used to project this 3D world onto a computer screen. In this situation, the processing time and bandwidth are at a ....etc

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Abstract:
3D computer graphics (in contrast to 2D computer graphics) use a three-dimensional representation of geometric data (often Cartesian) that is stored in the computer for the purposes of performing calculations and rendering 2D images. Such images may be for later display or for real-time viewing, here we explain The process of creating 3D computer graphics and it can be sequentially divided into three basic phases: 3D modeling which describes the process of forming the shape of an object, layout and animation which describes the moti ....etc

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