Marker Based/ Image recognition: In marker/image based recognition, we create a marker and save its data into the application. This marker can be in the form of a bitmap image. While using the application, when the camera finds that image in the viewfinder, it gets to know from its marker repository that this image has been marked as a marker and then it pulls the information from its database about that marker. This information can be in the form of a 3D model or text about that image. This data is superimposed over the image to show the data