Abstract
Sea-bottom images of stereographic pair for 3D viewing are easily obtained if 3D video camera is set in pressure case with transparent window or using 2 sets of ordinary video cameras.
In case of 1 set video camera, we can obtain images of stereographic pair for 3D viewing by taking continuous or overlapping shots during the horizontal movement of submersible.
3D viewing of sea-bottom produces real feeling in detail, but sometimes it causes too much exaggerated and non-real 3D image.
We developed a method to calculate rough sea-bottom undulations, and applied it to photographs obtained during the submersible Shinkai6500 dive#1075 of the YK08-07 cruise and video images during ROV Hyper-Dolphin dive#835 of the NT08-09 cruise as examples.
After reading the corresponding points in the stereographic pair images, the depths of those points were estimated using the image size, the camera altitude and the distance of the left and right camera locations (parallax).
