Estimation of Non-radial Geometric Distortions for Dash Cams

Due to the widespread use of dash cams (car DVRs), the estimation of geometric distortions introduced by such equipment is of particular interest. However, such geometric distortions are often complex and cannot be described using classical radial models. In this paper, we propose an original method for the estimation of complex geometric distortions. At the first step of the proposed method, we build distortion models based on the polynomial approximation of the lines of a calibration pattern for each particular processed frame. At the second step, we calculate the correction field and consistently refine it using built polynomial models.