When it comes to Augmented Reality there are a lot of different methods in making it happen. These methods all have one common element, they are all tracking something.
On this page i will be talking about different tracking methods i have encountered in my experience and explain how they differ and where they can potentially be used.
Note: This page will be updated rather frequently
Before talking about all the tracking methods there are some things (variables) that effect how augmentation works regardless of the method used to achieve it. So lets quickly cover those.
Advise suggested for a successful augmentation
1. Be aware about the light in your scene. Light is an important factor in augmentation as light reveals the surfaces/markers for which you can augment onto. However too much light in the scene can cause the camera tracking the marker to screw up as too much light will make it harder for the camera to track the marker. Same goes with not enough light and being too dark, if the scene is too dark then of course the camera cannot pick up the marker/surface you want to track, causing poor augmentation or non existent augmentation.
So to put it bluntly be aware of the light in your scene.
2. Keep your target in view of the camera!
So you have a marker or surface you want to track to create an augmented scene, that is excellent however please make sure to keep the marker in view of the camera.
This reason may seem obvious but of course if you lose enough of your marker then there isn’t enough for the program to track causing a break down in the augmented scene or not producing it at all.
However this rule is slowly being phased out by “Extended Tracking”
User Defined Targeting
This method of tracking is still being worked on most likely even when you are reading this article, however lets talk about how it works.
As you can guess by the title it allows the user themselves to select a surface for them to augment onto. The surface needs to be flat and have a pattern on it. The pattern can be anything like a photo, logo, text pretty much anything a dvd cover a colourful leaflet.
How? The pattern would usually have to be varied and NOT be repetitive as different points in the pattern can be noted. If the program successfully makes a target out of a pattern it is because of the different points and there are enough of them allowing the software to overlay a 3d model in the place of the pattern.
Don’t worry if you don’t get it, I didn’t either until experimenting.