Binocular Vision based 3D Reconstruction of Ocean Waves and Position Coordinate Measurement

Ocean waves are a complex natural phenomenon, and the changes of ocean waves can usually reflect the characteristics of wind direction and seabed geology. This article discusses a sea wave measurement method with binocular vision. Without contacting the sea wave itself, it establishes an accurate 3D model of the sea wave captured by the camera and measures its metric 3D coordinates in the world coordinate system and the actual camera. In this work, we first calibrate the internal and external parameters of the binocular camera with a fixed baseline, then calculate the depth map of the left camera image, and finally use the camera projection model to project the two-dimensional ocean wave scene captured by the camera into a three-dimensional dense point cloud. For any pixel manually selected on the ocean wave image, the actual position of the pixel in the three-dimensional space and the distance to the optical center of the left camera can be obtained by the triangulation method. We performed three-dimensional reconstruction of the same wave area in continuous time, and drew elevation maps and contour lines for the three-dimensional reconstruction results. The experimental results show that this method can achieve our expected results.