Industry Knowledge: "Eye-in-Hand" And "Eye-to-Hand" in Machine Vision

Eye-in-Hand

Definition

Advantages

1. High positioning accuracy: The tight integration of the camera and robotic arm minimizes information transmission errors in intermediate links, enabling precise positioning and grasping of target objects. It is particularly suitable for precise operations in narrow spaces and tracking of dynamic objects.

2. Strong autonomous operation capability: The camera can acquire accurate image information of the target in real time, and the robotic arm can perform precise positioning and grasping based on this data.

Disadvantages

• The system design is complex, requiring seamless coordination between the camera and the robotic arm.

• As the camera moves with the robotic arm, it may be affected by the arm's motion, such as vibration and acceleration, which imposes high requirements on the camera's stability and reliability.

Eye-to-Hand

Definition

Advantages

1. Flexible camera placement: The position and angle of the camera can be adjusted as needed to achieve optimal field of view coverage.

2. Reduced load on the robotic arm: The robotic arm does not need to bear the additional weight of the camera, which helps improve its movement speed and flexibility.

3. Wide field of view: It can cover a larger working area, making it suitable for production environments requiring a broad field of view, such as automobile assembly lines and object recognition in automated warehouses.

Disadvantages

• Positioning accuracy is limited: The distance between the camera and the robotic arm may affect the positioning precision.

• Poor adaptability: For scenarios that require frequent adjustment of operation positions or handling complex environments, the eye-to-hand system may be inadequate.