Three Dimensional Imaging System for Subsea Inspection

2006 ◽  
Author(s):  
L. C. P. Messina ◽  
A. P. Simo˜es ◽  
A. Botto ◽  
A. Petra´glia
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Three Dimensional ◽  
Design Procedure ◽  
Small Scale ◽  
Remotely Operated Vehicle ◽  
Campos Basin ◽  
Remote Sites ◽  
Scale Test ◽  
Three Dimensional Vision

This work presents the Stereo Vision and 3D Submarine Dimension System design and its experimental test to validate the system, which is the result of cooperation between PETROBRAS and COPPE/UFRJ, with the purpose of developing a system that allows, in real time, the three-dimensional visualization (stereo) and dimension of submarine structures (pipes, umbilical, connectors and valves) and anomalies. Basically, the system is characterized by an optimized hardware-and-software co-design procedure. The software includes a stereophotogrametry algorithm for precise, real-time, inspection and dimensioning operations. From a pair of cameras positioned on a ROV - Remotely Operated Vehicle, the system allows the telepresence sensation by three-dimensional vision of remote sites considerably reducing the time and, consequently, the costs of operation. The work also presents test results: laboratory small scale tests, test at PETROBRAS tank and a full-scale test on an inspection boat, with dimension of real pipe damages at Campos Basin. The system will provide three-dimensional images of submarine structures allowing the acquisition of consistent and accurate data to assist the decision for the need of repairing operations.

scholarly journals Development of an X-ray real-time stereo imaging technique using synchrotron radiation

2011 ◽  
Vol 18 (4) ◽  
pp. 569-574 ◽  
Author(s):  
Masato Hoshino ◽  
Kentaro Uesugi ◽  
James Pearson ◽  
Takashi Sonobe ◽  
Mikiyasu Shirai ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Real Time ◽  
Imaging System ◽  
Silicon Crystal ◽  
Three Dimensional ◽  
Stereo Image ◽  
Large Field ◽  
Depth Information ◽  
Stereo Imaging ◽  
X Ray

An X-ray stereo imaging system with synchrotron radiation was developed at BL20B2, SPring-8. A portion of a wide X-ray beam was Bragg-reflected by a silicon crystal to produce an X-ray beam which intersects with the direct X-ray beam. Samples were placed at the intersection point of the two beam paths. X-ray stereo images were recorded simultaneously by a detector with a large field of view placed close to the sample. A three-dimensional wire-frame model of a sample was created from the depth information that was obtained from the lateral positions in the stereo image. X-ray stereo angiography of a mouse femoral region was performed as a demonstration of real-time stereo imaging. Three-dimensional arrangements of the femur and blood vessels were obtained.

Wavefront Coded Imaging Systems for MEMS Analysis

2002 ◽  
Author(s):  
Daniel L. Barton ◽  
Jeremy A. Walraven ◽  
Edward R. Dowski ◽  
Rainer Danz ◽  
Andreas Faulstich ◽  
...  
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
High Performance ◽  
Imaging System ◽  
Three Dimensional ◽  
Imaging Systems ◽  
Depth Of Field ◽  
Real Time Imaging ◽  
Large Depth ◽  
Wavefront Coding

Abstract A new imaging technique called Wavefront Coding allows real-time imaging of three-dimensional structures over a very large depth. Wavefront Coding systems combine aspheric optics and signal processing to achieve depth of fields ten or more times greater than that possible with traditional imaging systems. Understanding the relationships between traditional and modern imaging system design through Wavefront Coding is very challenging. In high performance imaging systems nearly all aspects of the system that could reduce image quality are carefully controlled. Modifying the optics and using signal processing can increase the amount of image information that can be recorded by microscopes. For a number of applications this increase in information can allow a single image to be used where a number of images taken at different object planes had been used before. Having very large depth of field and real-time imaging capability means that very deep structures such as surface micromachined MEMS can be clearly imaged with one image, greatly simplifying defect and failure analysis.

scholarly journals Three-Dimensional Microscopic Image Reconstruction Based on Structured Light Illumination

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6097
Author(s):  
Taichu Shi ◽  
Yang Qi ◽  
Cheng Zhu ◽  
Ying Tang ◽  
Ben Wu
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Structured Light ◽  
Three Dimensional ◽  
Light Illumination ◽  
3D Image ◽  
Light Pattern ◽  
Structured Light Illumination ◽  
Working Distance ◽  
3D Information

In this paper, we propose and experimentally demonstrate a three-dimensional (3D) microscopic system that reconstructs a 3D image based on structured light illumination. The spatial pattern of the structured light changes according to the profile of the object, and by measuring the change, a 3D image of the object is reconstructed. The structured light is generated with a digital micro-mirror device (DMD), which controls the structured light pattern to change in a kHz rate and enables the system to record the 3D information in real time. The working distance of the imaging system is 9 cm at a resolution of 20 μm. The resolution, working distance, and real-time 3D imaging enable the system to be applied in bridge and road crack examinations, and structure fault detection of transportation infrastructures.

Application of 3D Stereo Visualization System in Virtual Architectural Design

2012 ◽  
Vol 174-177 ◽  
pp. 1706-1709 ◽  
Author(s):  
Yan Jiang ◽  
Jian Tang
Keyword(s):  
Virtual Environments ◽  
Stereo Vision ◽  
Architectural Design ◽  
Imaging System ◽  
Three Dimensional ◽  
Implementation Process ◽  
Visual Observation ◽  
Good Sense ◽  
Visualization System ◽  
Three Dimensional Vision

The application of virtual reality in architectural design has been the focus of attention. But the true 3D sense of immersion is still a dream for the most designers and clients when they watch the computer screen. A new computer stereo vision imaging system was constructed to help us obtain 3D visual of architectures and the implementation process became easier. And the application of advanced three-dimensional vision technology offered a more scientific, more interesting means of display and human-computer interaction. By using 3D stereo vision imaging system, all designers and users can obtain 3D visual observation of virtual buildings and virtual environments with a good sense of immersion at any time and any place.

Sign in / Sign up

Export Citation Format

Share Document