A Calibration Method for Biprism-based Virtual Binocular Stereovision with Chromatic Aberration Correction and Structure Parameters Optimization

The chromatic aberration is inevitable in the biprism-based virtual binocular (BBVB) stereovision system. Moreover, calibration accuracy limits the measurement precision of the BBVB system. To address these issues, a calibration method for BBVB with chromatic aberration correction and structure parameters optimization is proposed. First, a chromatic aberration correction algorithm is utilized to enhance the captured images. Then, the intrinsic and the initial structure parameters of BBVB are obtained through coarse stereo calibration. Finally, a nonlinear optimization is employed to estimate the closest structure parameters. The experimental results of length measurement proved the superiority of our method.