Common self-polar triangle of separate circles for light field camera calibration

• Format: Article
• Language: zho
• Published: The Northwestern Polytechnical University 2021-06-01
• Series: Xibei Gongye Daxue Xuebao
• Subjects: light field camera calibration; self-polar triangle; separate circles; common self-polar triangle of separate circles; algorithm
• Online Access: https://www.jnwpu.org/articles/jnwpu/full_html/2021/03/jnwpu2021393p521/jnwpu2021393p521.html

Due to the trade-off between spatial resolution and angular resolution of the light field, it is difficult to extract high precision corner points and line features from light fields for calibration. A novel calibration pattern of separate circles is designed, and a light field camera calibration method based on common self-polar triangle with respect to separate circles is proposed in this paper. First, we explore the uniquity and reconstruction of common self-polar triangle with respect to sperate circles. Then, based on projections of the multi-projection-center model on the plane and conic, the common self-polar triangle on the sub-aperture image is reconstructed and used to estimate planar homography. Finally, a light field camera calibration algorithm is then proposed, including linear initialization and non-linear optimization. Experimental results on both synthetic and real data have verified the effectiveness and robustness of the method and algorithm proposed.