Best ARmarker Anchor (precision)

Best way to get a precise rectangle bounds on a 3D object ?

In my case, I want to get the horizontal rectangle of several keys on a piano keyboard. My solution is to put tracker on the keys:

For that I have 2 questions :

  • First : What is the more accurate tracker between image recognition (with good contrast) or clip code ?

  • Second : Can it be more precise to put multiple clip codes on my piano keyboard ? For example, put 4 clip codes. (One on each corner of the bounding box of my group of keys)

Thanks a lot

Best ARmarker Anchor (precision)
 
 
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