RIASSUNTO
ABSTRACT
A short abstract (50 to 100 words) in a single paragraph should be included here.
JAMSTEC is now dealing with some significant problems related to the ocean. In order to figure out the problems, various kinds of underwater vehicles have been developed and applied in response to actual demands. Especially, in the problem about submarine earthquake, the underwater vehicles are required to pay an important roles. One of them is to understand more detail condition of the seabed as fishery target place. So a seabed visualization system, which creates the 3D image mosaicking for seabed mapping applying a stereo vision, have been now progressed to develop. As the results of sea trials using an underwater vehicle, this system could create the detailed 3D image mosaicking of seabed.
INTRODUCTION
Recently, the ocean is focused on internationality in order to deal with various important issues which closely relates to the ocean. Especially, some problems about submarine earthquake has been strongly demanded to solve as soon as possible. As well known, the north-east coast of Japan was attacked by a giant Tsunami caused by the submarine earthquake occurred on March in 2011. As the result, harbors, airports, stations and railways, bridges and countless lots of buildings were devastated. Fig. 1 shows a landscape of the area at that time. And then, a huge amount of rubble was flowed out to the coast and they were submerged to the seabed. Parts of them were stayed on the seabed of comparative shallow coast as shown in Fig. 2. On the other hand, the remaining of them was flowed out to the deeper seabed. They caused the environment change of both the shallow seabed and the deep seabed. So many people, who work as fishermen, strongly demands to understand the present detail seabed conditions, namely that they want to know not only the species, male-female, size of marine organism as fishily targets but also the living density and the distribution of them. However, it is impossible to understand the deep seabed condition because they don't generally have any tools to realize that. In order to understand the deep seabed condition including such information about marine organism, a seabed visualization technology, which has capabilities to express the shape, the color and geometric information of marine organism with more detailed seabed topography, is needed. Because any existing acoustic imaging technologies are not able to express small objects such as marine organism, and they are not originally able to express the color information. As a matter of course, a platform, which can dive to the deep seabed and survey there using the seabed visualization technology, is also needed.