Mastering OpenCV 4 with Python

Creating markers and dictionaries

The first step when using ArUco is the creation of markers and dictionaries. Firstly, an ArUco marker is a square marker composed of external and internal cells (also called bits). The external cells are set to black, creating an external border that can be fast and robustly detected. The remaining cells (the internal cells) are used for coding the marker. ArUco markers can also be created with different sizes. The size of the marker indicates the number of internal cells related to the internal matrix. For example, a marker size of 5 x 5 (n=5) is composed of 25 internal cells. Additionally, you can also set the number of bits in the marker border.

Secondly, a dictionary of markers is the set of markers considered ...