A Refractive Distortion Correction Method for 3D Root Reconstruction

Measurement of plant root system architecture (RSA) traits is an important task for botany. Usually, the botanists put the plants in a transparent gel container for easy observation. Under this configuration, an easy-to-use way to measure RSA traits is to take images for observation. However, in single-view-angle 2D image often has problems such as occlusion and lack of depth information, so it is not convenient for measurement. Therefore, the reconstruction of the 3D root model from multi-view-angle images is a better solution. Under the above-mentioned planting configuration, the refractive distortion problem usually arises. This will lead to serious distortion of model reconstruction, so in this paper, a method based on ray tracing for correcting refraction distortion of objects in cylindrical containers is proposed.