{"id":76415,"date":"2022-10-31T17:53:28","date_gmt":"2022-10-31T09:53:28","guid":{"rendered":"https:\/\/www.tm-robot.com\/?post_type=docs&p=76415"},"modified":"2025-11-05T14:25:39","modified_gmt":"2025-11-05T06:25:39","slug":"notice-on-external-camera-calibration","status":"publish","type":"docs","link":"https:\/\/www.tm-robot.com.cn\/en\/docs\/notice-on-external-camera-calibration\/","title":{"rendered":"Notice on External Camera Calibration"},"content":{"rendered":"
TMflow Software version: All versions.<\/p>\n
TM Robot Hardware version: All versions.<\/p>\n
Other Specific Requirements: External Camera and Lens<\/p>\n
Note :<\/p>\n
While using an external camera, whether in the EIH or ETH setting, it is essential to calibrate the intrinsic parameters of the camera. After determining the working distance between the camera and the object to be inspected (target), adjustment to the lens aperture and focus is required since it helps enhance imaging precision and quality, and minimize image distortion and errors.<\/p>\n
Whether in the EIH or ETH setting, calibration of intrinsic parameters is required while using an external camera. If the aperture and focal length of the camera are changed, it is necessary to recalibrate the intrinsic parameters.<\/p>\n <\/p>\n Below are some recommended poses to place the TM Calibration Plate during the calibration procedure. There are 15 poses in total.<\/p>\n Keep the calibration board stationary and positioned within the camera\u2019s field of view. Place a book underneath it to create an inclination of approximately 5\u201310 degrees. Position the calibration board at six different locations below this setup.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<\/ul>\n <\/p>\n Next, keep the calibration board stationary and within the camera\u2019s field of view. Add another book underneath to tilt the calibration board by approximately 10\u201320 degrees. Place the calibration board at six different positions beneath this setup.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<\/ul>\n
<\/a><\/p>\nIntrinsic Parameter Calibration Process<\/h1>\n
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