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Reflective Marker with high colour contrast

March 13, 2014 - 6:09pm #1

Hey all,

I'm trying to track a reflective marker (cylindrical in this case). Unsuprisingly there are massive issues with reflections altering the black-white tones of the marker's feed.

However, the marker has extremely bright contrasting colours. I've done a bit of research and it seems like Vuforia just uses greyscale for marker recognition. So I'm wondering if it's possible to do a bit of pre-processing on the camera feed to convert the RGB contrast in each frame to some modified greyscale feed, then send that through the marker recognition process (of course with a likewise modified target).

Has anyone done something similar or know of any other solutions?

Since so much is handled by the Vuforia SDK, is it even possible to alter the camera stream pre-recognition?


Reflective Marker with high colour contrast

March 14, 2014 - 1:26am #2

Hi, Vuforia does not support pre-processing of the camera feed. The camera images are directly injected into the Vuforia engines, and the API does not allow you to hook into the image before it reaches the Vuforia tracker.

If you wish to see such a feature in a future release of the SDK, you can post this in our Forum Wish List, so that we can take it into account; note that we have seen other developers with similar request in the past:


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