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Recognition of projectored AR target - coloured banding artfact

January 26, 2016 - 1:20am #1

 

Hi!

We're currently using Vuforia to recognise a projected target that is beamed from a DLP projecter.

The recognition works ok.  But the camera (Android - Nexus 9 and a number of other tested devices) is getting some red, green and blue coloured banding artfacts when viewing the projected image.

I believe this is due to the colour wheel of the projector displaying alternate red, green and blue colours.  So when a fast shutter speed is used it results in the banding arfifacts.

I have experimented with different shutter speeds of the camera externally to Vuforia and have found that this artfact can be tuned out with a slower shutter speed.  But I have not found any way to adjust shutter speed in Vuforia.  Is there a way?  If not with the Vuforia API is there any other way to set this with a custom plugi?

I am using the Vuforia plugin for Unity.

Thanks!

David.

 

Recognition of projectored AR target - coloured banding artfact

January 29, 2016 - 3:07pm #2

davidlyne wrote:

But I have not found any way to adjust shutter speed in Vuforia.  Is there a way?

Currently, the CameraDevice class exposes methods for focus, but not for changing settings related to exposure.

You can post requests for desired features to our Wish List thread if you like:

https://developer.vuforia.com/forum/general-discussion/wish-list

 

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