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Is it better to use MarkerTracker or ImageTracker for this?

November 12, 2012 - 2:41am #1

Hi, I'm currently in the midst of creating my first AR app using Vuforia. My question relates to need to have 9 Trackables for creating a bezier surface -alike rendering based on these Trackables. It's actually Catmull-Rom splines I'm using but the idea remains. For tracking I've used MarkerTrackers so far but am wondering does ImageTracker provide me with similar possibilities? With better accuracy maybe?

What I need is points and normals for them (up vector) at each corner of the paper. Plus in addition points in the middle of these corners and one in the center of the paper. Giving me a 3x3 grid I can use for surface creation.

Is it better to use MarkerTracker or ImageTracker for this?

November 12, 2012 - 7:27am #4

You're welcome.

Is it better to use MarkerTracker or ImageTracker for this?

November 12, 2012 - 7:24am #3

Thank you for your answer. I think I will give ImageTracker a go (this project is for learning purposes after all) and see how it compares to markers.

Is it better to use MarkerTracker or ImageTracker for this?

November 12, 2012 - 7:08am #2

Hi, both ImageTargets and Markers can be used for this task; once detected and tracked, they both report a Pose matrix giving you orientation and position of your marker/target in space. 

Also, you can obtain same tracking accuracy with both.

Keep in mind the following however:

- with Image targets you have more freedom to chose your own images for tracking (the ImageTargets sample show the Chips and Stones sample images, but you can build your own image targets using the Target Management System (TMS) as explained in the online DevGuide).

- however, Image Targets can be harder to detect (compared to markers) when the Tracking Rating is not sufficiently high (see DevGuide online for more details on trackig rating and how to create good image targets). So, using Image Targets will require some little extra work to create good targets (i.e. with high tracking rating); with Markers you don't have this problem. 

So, it depends really what is the goal / focus of your project to choose one or the other. 

 

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