International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
A REVIEW: AUGMENTED REALITY AND ITS WORKING Vaishali Agrawal1, Jignesh Patel2 1Student,
Computer Engineering Department, Indus University, Ahmedabad, India Professor, Computer Engineering Department, Indus University, Ahmedabad, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Assistant
Abstract - Augmented reality (AR) is a technology that has
graphics. The hearing and vision are enhanced in such a manner that the user feels he is actually experiencing the computer generated or recreated environment. Whereas, Augmented Reality places the virtual objects in the real environment in real time which we can see through the different display objects and turns the environment around us into a digital interface. Augmented and Virtual Reality both fall in the range of mediated reality.
taken the world by storm in the past few decades. Its applications are now found in almost all the fields possible. It is a technology that puts graphics, images, and other computer generated augmentations upon a reality that already exists, in order to improve the experience of the user by enabling different interactions between the user and his environment. In this review paper, we basically present how AR actually works and what are the different technologies that are involved in its implementation. These technologies help to project or augment that virtual object onto the real world.
Key Words:
Augmented reality, displays, location based, marker-based, virtual reality
1. INTRODUCTION The basic idea of augmented reality is to overlay images, graphics, and audio and other intelligence enhancements over a real environment in real time. The system is to grow the user’s idea of and interaction with the real world by augmenting the real world with 3D virtual objects that appear to exist in the same space as the real environment. [1] Various technologies like virtual reality, augmented reality, sixth sense technology, computer graphics and different sensors work together, to create a world where virtual objects are superimposed upon the real life environment. AR or virtual reality (VR) technologies have grabbed the eyes of researchers for quite some time now. AR and virtual reality are often confused with one another, where as in reality, they overlap each other and somewhere work together.
2. HOW AR WORKS?
1.1 Augmented Reality versus Virtual Reality
In AR, additional information is presented to the user as virtual objects whose main aim is to enhance his/her experience by widen his senses of hearing, feel and vision. So, one need is to have an engine or some mechanism which is capable of depicting or interpreting virtual objects over an existing real time environment. Various types of displays are used in AR technology like Head Mounted Displays [HMD], handheld displays, spatial displays etc. [5] Both the images of the real physical world and the virtual graphical world are kept by the HMDs over the user’s world view. These devices can be either video transparent or optically transparent. They use mirrors that are partially silvered which pass the real world views and images through a lens. This mechanism
2.1 Augmented Reality Components A highly efficient AR device is made by combining the basic components used in AR technology. These include the different display units, tracking module, computer or other portable devices, different scanning algorithms, etc. Other than these, various devices like high resolution cameras, accelerometers, high speed multi-processors, different sensors like gyroscope, pressure sensors, and rotation sensors are also used to increase the reliability and performance of the AR device.
Virtual reality means generating such an environment within the computer that the user can interact with and get immersed in. This world exists only in the digital land, i.e. we cannot really feel or touch the things. Whereas, Augmented reality (also called AR), enhances the reality we would ordinarily see rather than replacing it. It takes the real time environment of the present world and projects or displays digital images and sounds into it. [2,3,4] Virtual reality (VR) artificially replicates or recreates the real time world environment by using computer generated
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