Detect ArUco markers

POST /api/image-detect-aruco

Detect ArUco fiducial markers in an image. Returns the marker ID, the four corners, and the rotation. Used in AR, robotics, and camera calibration.

Detects ArUco markers — printed black-and-white square fiducials with a unique ID encoded in the pattern. Common in AR / VR, robotics, and camera calibration. Returns each marker's ID, its four corners (image pixel coords), and a derived rotation angle. Multiple dictionaries are supported (4×4, 5×5, 6×6, 7×7).

Inputs

Name	Type	Default	Description
image*	file	—	Input image bytes.
dictionary	enum (4x4_50 \| 4x4_100 \| 4x4_250 \| 4x4_1000 \| 5x5_50 \| 5x5_100 \| 5x5_250 \| 5x5_1000 \| 6x6_50 \| 6x6_100 \| 6x6_250 \| 6x6_1000 \| 7x7_50 \| 7x7_100 \| 7x7_250 \| 7x7_1000)	"6x6_250"	ArUco dictionary.

Response

Modes: json. Cache: yes (24h TTL).