what is Augmented reality ? | what is AG ?


Augmented reality is the technology of combining real word images, video, etc. with computer-generated information.
 AG is the integration of digital information with the user's environment in real time. Unlike virtual reality(VR), which creates a totally artificial environment, augmented reality uses the existing environment and overlays new information on top of it..






suppose a device which, when you use it to look at something,.This can by anything..displays information on whatever you're pointing it at. Focus on a restaurant, and a display pops up giving a menu and customer reviews, look at a historic building, and you're told when and by whom it was built, or point towards that chap sitting opposite you on the metro, and find out this stranger's name and age. These are the sort of possibilities afforded by the new technology of augmented reality or AR. isn't it wonderful ?
The word Augmented reality comes from the term augment which means to add something..in AR graphics sounds various feedbacks and effects are added to our natural world

DIFFERENT TYPES OF AUGMENTED REALITY 
Augmented reality does not end at your smartphone. There are many more ways to enhance your perception of the worldSmartphones are probably one of the first objects where us mortals got to experience augmented reality; after all they are omnipresent. However, with time, as we look around us and observe closely, we find that augmented reality is prevalent elsewhere too.Let us have a look at the types of AR. Before we begin, understand that lines are blurred, broken and twisted. Definitions explained here are not written in stone.

PROJECTION BASED AR

Just like anything else which is beyond our reach, projection based AR feels more attractive (at least as of now) compared to an AR app you can install on your phone. As is obvious by its name, projection based AR functions using projection onto objects. What makes it interesting is the wide array of possibilities.

RECOGNITION BASED AR

Recognition based AR focuses on recognition of objects and then provide us more information about the object. e.g. when using your mobile phone to scan a barcode or QR code, you actually use object recognition technology. Fact is, except location based AR systems, all other types do use some type of recognition system to detect the type of object over which augmentation has to be done.
Recognition based AR technology has varied uses as well. One of them is to detect the object in front of the camera and provide information about the object on screen. This is something similar to the AR apps for travellers (location browsers). However, the difference lies in the fact that the AR location browsers usually do not know about the objects that they see while recognition based AR apps do.

OUTLINING AR

Though the human eye is known to be the best camera in the world, there are limitations. We cannot look at things for too long. We cannot see well in low light conditions and sure as anything, your eye cannot see in infrared. For such cases, special cameras were built. Augmented reality apps which perform outlining use such cameras. Once again, object recognition sits behind all that outlining AR can do. Let us begin with a life-saving implementation example.1 When driving a car on a road in foggy weather, the boundaries of the road may not be very visible to the human eye, leading to mishaps. Advanced cameras tuned specially to see the surroundings in low light conditions can be used to outline the road boundaries within which the car should stay. Such a system would prove very useful in avoiding accidents. With extra sensors capable of detecting objects around (e.g. by using ultrasound) the overall risk of hitting some living object can be minimized as well.

LOCATION BASED AR 

It would be an injustice not to mention this category when talking about AR. Location based augmented reality is one of most widely implemented applications of AR. The strongest force behind this is the easy availability of smartphones and the features that they provide in terms of location detection. Location based AR is mostly used to help travellers in their journey.Location based AR in most cases is used for AR location browsers which help users discover interesting places within their current location. This method works by detecting the user’s location and orientation by reading data from the mobile’s GPS, digital compass and accelerometer and predicting where the user is looking  then adding related information on screen about the objects that can be seen from the camera. 

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