222
P. Drap et al.
In this paper, we are presenting a new method of 3D surveys which are dedicated
to high resolution modeling of underwater sites. The main met constraints in situ
are taken into account and this method leads to a precise 3D reconstruction. Some
examples will present both the main obtained results and their limitations. We will
end with the perspectives and the necessary improvements to the method, so as to
automate the multimodal registration step.
Keywords Photogrammetry · 3D · Wreck · Digital photographs · Automatic Color
Equalization
14.1 Introduction and Main Goals
ROV 3D project is partially funded by the European Regional Development Fund
and the French Single Inter-Ministry Fund (FUI) for funding research involving both
academic laboratories and industry.
The consortium consists of an organization of academic research, LSIS laboratory,
and of two industrial partners, COMEX and SETP. COMEX is skilled in underwater
scouting and outdoor engineering, whereas SETP is skilled in dimensional control
by photogrammetry and topometry.
At the present time, and in the field of high resolution underwater surveys, there
is no industrialized automatic treatment. Although, nowadays, certain private businesses propose service charge in underwater sharp metrology by photogrammetry,
these offers use traditional methods of close range photogrammetry, based on automatic recognition of coded targets and bundle adjustment. These approaches, precise
as they are, need human interference on the object and a site preparation (target laying in the place you want to measure), which, in the underwater context, may be a
great handicap.
The project’s goal is to develop automated proceedings of 3D surveys, dedicated to
underwater environment, using acoustic and optic sensors. The acoustic sensor will
allow acquiring a great amount of low resolution data, whereas the optic sensor (close
range photogrammetry) will allow acquiring a low amount of high resolution data.
From these two surveys, a high resolution numeric structure build 3D modeling of
large complex scenes will be proposed to final users, with the production of different
type of outputs (SIG 3D, MNT, Mosaic, . . .). These models can be analyzed and
compare at any time and can be used to study sites or landscapes’ evolution in time.
In practice, a 3D acoustic scanner will make a large scan of the scene to model,
and an optic system will make the high resolution photogrammetric restitution of
the different areas in the scene. While our software tools will do the automatic
registration of both data sources, other algorithms, developed during the project,
will recognize and model objects of interest. Eventually, these data will allow us
to establish objects’ symbolic representation and their geometry in a precise virtual
facsimile, responding to the partners’ need in documentation.
P. Drap et al.
In this paper, we are presenting a new method of 3D surveys which are dedicated
to high resolution modeling of underwater sites. The main met constraints in situ
are taken into account and this method leads to a precise 3D reconstruction. Some
examples will present both the main obtained results and their limitations. We will
end with the perspectives and the necessary improvements to the method, so as to
automate the multimodal registration step.
Keywords Photogrammetry · 3D · Wreck · Digital photographs · Automatic Color
Equalization
14.1 Introduction and Main Goals
ROV 3D project is partially funded by the European Regional Development Fund
and the French Single Inter-Ministry Fund (FUI) for funding research involving both
academic laboratories and industry.
The consortium consists of an organization of academic research, LSIS laboratory,
and of two industrial partners, COMEX and SETP. COMEX is skilled in underwater
scouting and outdoor engineering, whereas SETP is skilled in dimensional control
by photogrammetry and topometry.
At the present time, and in the field of high resolution underwater surveys, there
is no industrialized automatic treatment. Although, nowadays, certain private businesses propose service charge in underwater sharp metrology by photogrammetry,
these offers use traditional methods of close range photogrammetry, based on automatic recognition of coded targets and bundle adjustment. These approaches, precise
as they are, need human interference on the object and a site preparation (target laying in the place you want to measure), which, in the underwater context, may be a
great handicap.
The project’s goal is to develop automated proceedings of 3D surveys, dedicated to
underwater environment, using acoustic and optic sensors. The acoustic sensor will
allow acquiring a great amount of low resolution data, whereas the optic sensor (close
range photogrammetry) will allow acquiring a low amount of high resolution data.
From these two surveys, a high resolution numeric structure build 3D modeling of
large complex scenes will be proposed to final users, with the production of different
type of outputs (SIG 3D, MNT, Mosaic, . . .). These models can be analyzed and
compare at any time and can be used to study sites or landscapes’ evolution in time.
In practice, a 3D acoustic scanner will make a large scan of the scene to model,
and an optic system will make the high resolution photogrammetric restitution of
the different areas in the scene. While our software tools will do the automatic
registration of both data sources, other algorithms, developed during the project,
will recognize and model objects of interest. Eventually, these data will allow us
to establish objects’ symbolic representation and their geometry in a precise virtual
facsimile, responding to the partners’ need in documentation.