Philip Yamba, James Kwasi Quaisie, Vitus Mwinteribo Tabie, Enock Asuako Larson, Anthony Akayeti, Joseph Sekyi-Ansah, Abdul-Hamid Mohammed
The size measurement technique is of great significance to large equipment manufacturing in industries such as automobile, aerospace, shipbuilding etc. Vision measurement for a large-size has become a very promising method where calibration of the cameras is the key and the base to obtain satisfactory accuracy. Because of contact in the conventional metrological method which is not robust and precise for large-size measurement, a new non-contact large-size precision measurement method is proposed in this paper based on the splicing of small-field calibrations which realizes the entire field-of-view (FOV) calibration of the measured component using one binocular stereo vision system. According to the FOV of the binocular stereo-vision system, the size of the measured component was divided into sub-FOVs, and each FOV was calibrated by a planar template using Zhang’s method. After matching and combing all the sub-sections, the total size of the component could be obtained. A series of experiments were also conducted to verify the precision and effectiveness of the proposed calibration.
large-size, precision measurement, small-field calibration combination and machine vision
Cite this paper
Philip Yamba, James Kwasi Quaisie, Vitus Mwinteribo Tabie, Enock Asuako Larson, Anthony Akayeti, Joseph Sekyi-Ansah, Abdul-Hamid Mohammed. (2023) A Large-size Precision Measurement Method based on Sub-FOV Calibration Splicing. International Journal of Applied Physics, 8, 17-24