docs/user_guide/aruco_markers/dictionary_selection.md


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Dictionary selection
====================

ArUco markers always belongs to a set of markers called ArUco markers dictionary.

![ArUco dictionaries](../../img/aruco_dictionaries.png)

Many ArUco dictionaries exist with properties concerning the format, the number of markers or the difference between each markers to avoid error in tracking.

Here is the documention [about ArUco markers dictionaries](https://docs.opencv.org/3.4/d9/d6a/group__aruco.html#gac84398a9ed9dd01306592dd616c2c975).

``` python
from argaze.ArUcoMarkers import ArUcoMarkersDictionary

# Create a dictionary of specific April tags
aruco_dictionary = ArUcoMarkersDictionary.ArUcoMarkersDictionary('DICT_APRILTAG_16h5')
```