Measuring Straightness Errors of Slender Shafts Based on Coded References and Geometric Constraints

The coded references and geometric constraints based method is suggested to solve the inconsistency problem of measurement range and accuracy for slender shafts. First, a slender shaft is divided into segments. Images of each segment along with a coded and calibrated reference are taken at two object distances. The code of the reference is obtained using the template match technique. Consequently,...