10 Journal of Data Processing Volume 2 Number 1 March 2012 Mohamed Sakkari 1 , Mourad Zaied 2 , Chokri Ben Amar 2 1 Computer Science Department University of Gabes Faculty of Sciences of Gabes (FSG) Cite Erriadh 6072, Zrig, Gabes Tunisia 2 Research Groups on Intelligent Machines University of Sfax National Engineering School of Sfax (ENIS) BP1173, Sfax, 3038 Tunisia sakkari.mouhamed@gmail.com, {mourad.zaied, chokri.benamar}@ieee.org ABSTRACT: Increased reality computer is an emerging field, which is progressing sharply. Its principle is to mix the real world with the virtual world. The real corresponds to concrete scenes related to a specific environment, whereas the virtual corresponds to synthetic scenes constructed by the computer with no real existence. It tries to encourage the user to interact with the real scene as if the virtual objects added are there for real. The augmented reality then aims at increasing our perception of the real world by adding virtual objects. It helps the user to execute new tasks in the real world in an innovative way. Therefore, to look realistic, the virtual objects must be properly aligned with real-world objects. In this work we have presented a system of augmented reality without markers. To achieve this augmentation, we have used the hand of the user. The system then has to identify it to ensure the realization of the augmentation. Keywords: Augmented Reality, Virtual objects, Hand tracking Received: 8 August 2011, Revised 23 September 2011, Accepted 30 September 2011 © 2012 DLINE. All rights reserved 1. Introduction The Augmented reality [1-2, 3] aided by a computer is rapidly growing is an emerging field. Its principle is to mix the real and the virtual world. It aims at increasing our understanding of the real world, adding fictional elements, not visible a priori. According to Ronald Azuma is “an environment that includes both virtual reality and real-world elements. For instance, an AR user might wear translucent goggles; through these, he could see the real world, as well as computer-generated images projected on top of that world.” [4].Augmented reality refers therefore to the different methods to embed with a realistic way and in real-time [5] virtual objects in an image sequence. The increase or the augmentation in the real scene is an operation of image processing that is done in the background of a real video stream. In augmented reality applying the knowledge of the position and orientation from the perspective of the camera (or camera pose) is essential because it ensures those of the increased or augmented scene. Indeed, the pose estimation allows the space-time Using Hand as Support to Insert Virtual Object in Augmented Reality Applications