In the field of Augmented Reality the distinction is made between two distinct modes of tracking, known as marker and markerless. In this blog post we are going to examine marker tracking: what it means, and what processes occur to make it possible.
A marker in the context of AR refers to what is more generally known as a fiducial marker. A fiducial marker is any object that can be placed in a scene to provide a fixed point of reference of position or scale. In AR, these markers can provide an interface between the physical world and the augmented reality content, such as 3D models or videos. At their core these markers allow the device which is generating the AR content to calculate the position and orientation (collectively known as pose), of its camera. When this calculation is done in real time, this process is known as tracking.
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