A correcting method was described to improve the accuracy of line structuredlight measurement system. According to the errors between the actual object spots calibrated and the object spots calculated from the calibration approach

the database of cameras pixelobjecterror is established by interpolation. The result of measurement can be corrected by using the database. Tsais calibration and polynomial fitting were used in the experiments

and the results are corrected by the method and analyzed. The experiments show that the correcting method is effective and applicable to a variety of calibration methods and the precision is suitable for the requirement of measurement.