ArUco MIP 36h12
ArUco MIP 36h12 holds 250 markers of
6×6 bits. In OpenCV it is
cv2.aruco.DICT_ARUCO_MIP_36h12.
Generate a ArUco MIP 36h12 board
The numbers
| OpenCV name | cv2.aruco.DICT_ARUCO_MIP_36h12 |
| Bits in a marker | 6 × 6 = 36 |
| Markers available | 250, with IDs 0 to 249 |
| Printed width | 8 cells, border included |
| Bits the decoder repairs | 5 |
| Cell size on a 100 mm marker | 12.5 mm |
| Pixels wanted in the image | 96 (floor 32) |
| Range for a 100 mm marker | about 1.7 m |
Range assumes a camera 1920 px wide, 60 degree horizontal field of view, which is a focal length of about 1663 pixels, and a marker seen straight on.
When to use it
Six bit markers are the usual default. They carry enough redundancy to shrug off a damaged or partly shadowed cell, at a modest cost in range. ArUco MIP 36h12 comes from the ArUco library authors and was chosen for a large minimum distance between markers, so it misreads rarely.
The rest of the family
| Dictionary | Markers | Bits repaired |
|---|---|---|
| ArUco MIP 36h12 | 250 | 5 |