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Frame color of marker

June 26, 2013 - 6:15pm #1

The default frame color of a marker is black, I tried other colors like  bule or green, works fine. But some color like yellow, is not working. It seems dark colors are better.  I guess QCAR will convert framemarker to a grayscale image, then might use a threshold for binarization.

Is there any tips for frame color selection? Pls tell me how to pick a better color of framemarker. 

Frame color of marker

June 27, 2013 - 7:10pm #3

Normally we print markers on white paper, so dark color has better contrast. Thanks! 

Frame color of marker

June 26, 2013 - 10:36pm #2

In general, you should pick a color that ensures a good contrast with the binary pattern on the border of the marker. But this can also be influenced by lighting conditions of your environment, so it's hard to set a precise rule here.

Some more information about Frame Markers are in our developer guide:

https://developer.vuforia.com/resources/dev-guide/frame-markers

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