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Optimal conditions for object recognition

January 21, 2015 - 3:59pm #1

I've been working with the object/toy recognition stuff and it seems pretty spotty,  In particular, figures with shiny paint jobs don't do very well.  I suspect this is because the specular reflections on reflective paint create trackable detail points which are inaccurate since the reflections change with the lighitng environment.  But then again, wouldn't shadows do that too?

I scanned my toy in a white product photography box--and it recognizes it there. But if I put the object on a table or something elsewhere in the room, it rarely recognies it.

Are there guideilnes for what makes a highly trackable 3D object?  (Like how you have guidelines for Image Target creation best practices?)

Optimal conditions for object recognition

January 23, 2015 - 12:21pm #4

;-)

Optimal conditions for object recognition

January 23, 2015 - 11:24am #3

Thanks!  This is exactly the info I was looking for.

Optimal conditions for object recognition

January 22, 2015 - 11:36pm #2

Yes, using highly reflective surfaces can make things a bit more problematic for object recognition. Same thing applies for shadows, indeed.

We have a guide for Object Reco and Object Scanning, here:

https://developer-beta.vuforia.com/library/articles/Training/Vuforia-Object-Scanner-Users-Guide

The guide mentions:

Supported Environments
 
Objects should be scanned under moderately bright and diffuse lighting.  To the extent possible, the surfaces of the object should be evenly lit and not contain shadows caused by other objects or people.

See also the example pictures in the guide. 

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