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-Set up ArUco markers
-====================
-
-First of all, ArUco markers needs to be printed and placed into the scene. 
-
-Here is an example scene where markers are surrounding a workspace with two screens, a control panel and a window.
-
-![Scene](../../img/scene.png)
-
-## Print ArUco markers from an ArUco dictionary
-
-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).
-
-The creation of [ArUcoMarkers](../../argaze.md/#argaze.ArUcoMarkers.ArUcoMarker) pictures from a dictionary is illustrated in the code below:
- 
-``` python
-from argaze.ArUcoMarkers import ArUcoMarkersDictionary
-
-# Create a dictionary of specific April tags
-aruco_dictionary = ArUcoMarkersDictionary.ArUcoMarkersDictionary('DICT_APRILTAG_16h5')
-
-# Export marker n°5 as 3.5 cm picture with 300 dpi resolution
-aruco_dictionary.create_marker(5, 3.5).save('./markers/', 300)
-
-# Export all dictionary markers as 3.5 cm pictures with 300 dpi resolution
-aruco_dictionary.save('./markers/', 3.5, 300)
-```
-
-!!! note
-      There is **A4_DICT_APRILTAG_16h5_5cm_0-7.pdf** file located in *./src/argaze/ArUcoMarkers/utils/* folder ready to be printed on A4 paper sheet.
-
-Let's print some of them before to go further.
-
-!!! warning
-	Print markers with a blank zone around them to help in their detection.
-
-## Describe ArUco markers place
-
-Once [ArUcoMarkers](../../argaze.md/#argaze.ArUcoMarkers.ArUcoMarker) pictures are placed into a scene it is possible to describe their 3D places into a file.
-
-![ArUco markers description](../../img/aruco_markers_description.png)
-
-Where ever the origin point is, all markers places need to be described in a [right-handed 3D axis](https://robotacademy.net.au/lesson/right-handed-3d-coordinate-frame/) where:
-
-* +X is pointing to the right,
-* +Y is pointing to the top,
-* +Z is pointing to the backward.
-
-!!! warning
-	All ArUco markers spatial values must be given in **centimeters**.
-
-### Edit OBJ file description
-
-OBJ file format could be exported from most 3D editors.
-
-``` obj
-o DICT_APRILTAG_16h5#0_Marker
-v 15.000000 0.378741 0.330527
-v 20.000000 0.378741 0.330527
-v 15.000000 5.120359 -1.255996
-v 20.000000 5.120359 -1.255996
-f 1 2 4 3
-o DICT_APRILTAG_16h5#1_Marker
-v 43.500000 31.428055 18.333317
-v 48.500000 31.428055 18.333317
-v 43.500000 36.428055 18.333317
-v 48.500000 36.428055 18.333317
-f 5 6 8 7
-o DICT_APRILTAG_16h5#2_Marker
-v 38.500000 2.678055 5.498381
-v 43.500000 2.678055 5.498381
-v 38.500000 5.178055 1.168253
-v 43.500000 5.178055 1.168253
-f 9 10 12 11
-```
-
-Here are common OBJ file features needed to describe ArUco markers places:  
-
-* Object lines (starting with *o* key) indicate markers dictionary and id by following this format: **DICTIONARY**#**ID**\_Marker.
-* Vertice lines (starting with *v* key) indicate markers corners. The marker size will be automatically deducted from the geometry.
-* Face (starting with *f* key) link vertices and normals indexes together.
-
-!!! warning
-	Markers have to belong to the same dictionary.
-
-!!! note
-    Markers can have different size.
-
-### Edit JSON file description
-
-JSON file format allows to describe markers places using translation and euler angle rotation vectors.
-
-``` json
-{
-    "dictionary": "DICT_APRILTAG_16h5",
-    "places": {
-        "0": {
-            "translation": [17.5, 2.75, -0.5],
-            "rotation": [-18.5, 0, 0],
-            "size": 5
-        },
-        "1": {
-            "translation": [46, 34, 18.333],
-            "rotation": [0, 70, 0],
-            "size": 5
-        },
-        "2": {
-            "translation": [41, 4, 3.333],
-            "rotation": [-60, 0, 0],
-            "size": 5
-        }
-    }
-}
-```