J.-A. Beraldin's research while affiliated with National Research Council Canada and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (141)
Recent interest in portable coordinate measuring systems (CMS) has attracted the attention of industrial users and the technical community at large. Articulated-arm CMM and Optically-Tracked CMM (OTCMM) systems have emerged from being nice-to-have to must-have 3D equipment on the shop floor. Portability and flexibility for in-process product measur...
One of the strongest limiting factors in close range photogrammetry (CRP) is the depth of field (DOF), especially at very small object distance. When using standard digital cameras and lens, for a specific camera – lens combination, the only way to control the extent of the zone of sharp focus in object space is to reduce the aperture of the lens....
One of the strongest limiting factors in close range photogrammetry (CRP) is the depth of field (DOF), especially at very small object
distance. When using standard digital cameras and lens, for a specific camera – lens combination, the only way to control the extent
of the zone of sharp focus in object space is to reduce the aperture of the lens....
This paper discusses a methodology to evaluate the accuracy of recently developed image-based 3D modelling techniques. So far,
the emergence of these novel methods has not been supported by the definition of an internationally recognized standard which is
fundamental for user confidence and market growth. In order to provide an element of reflectio...
Written by a team of international experts, this book provides a comprehensive overview of the major applications of airborne and terrestrial laser scanning. It focuses on principles and methods and presents an integrated treatment of airborne and terrestrial laser scanning technology. After consideration of the technology and processing methods, t...
The deployment of 3D optical scanning technologies for measuring three-dimensional shapes of sculptures of high morphological complexity, have seen recently a development so noticeable that it emerges as one of the most promising methods for the analysis and preservation of the Cultural Heritage. In spite of an undoubted richness of information pro...
The National Research Council in Canada (NRCC) has created a framework for gleaning information from very large TLS and imagery datasets, an evolution demonstrated in the Erechtheion project. Cultural heritage has been a central factor in the NRCC research and development program in 3D technologies. Erechtheion is on the Acropolis, next to the Part...
During the autumn of 2004, a team of 3D imaging scientists from the National Research Council of Canada (NRC) was invited to Paris to undertake the 3D scanning of Leonardo's most famous painting. The objective of this project was to 3D scan the Mona Lisa obverse and reverse in order to provide high-resolution 3D image data of the complete paint...
We present the procedure and technologies used to modelling of the Erechtheion at the Acropolis in Athens, a large complex structure with many challenges to data acquisition, processing, and visualisation. We used two scanners, one for medium range highresolution coverage (1-5 mm lateral data spacing) and one long-range scanner to capture some top...
This paper describes a computer-aided method for the reconstruction and modelling of complex sites based on content-based indexing of images. A pose, distortion and composition robust descriptor is automatically generated for each image associated with a given site. These descriptors are subsequently placed in a database, to be used for future quer...
This paper describes the content and the rational of a CD-ROM that brings both the history and the technology enthusiast to a new level of cognition about Western European history. This bilingual (Italian/English) digital document allows the visitor access to historical information about the Metopes of Selinunte and the temples remains that are tri...
This paper summarizes our initial work in evaluating 3D imaging systems at our state of the art newly constructed and equipped metrology laboratory. Completed in 2006, the laboratory space allows accurate measurements of 3D data from devices operating at standoff distances from a few centimeters up to 10 meters. A laminar flow of 20°C air at 50% hu...
This paper looks at the opportunities and challenges created by new 3D technologies introduced recently in the context of virtual reconstruction of cultural heritage sites for preservation and entertainment. A number of projects carried out by the authors in the last four years support the conclusions made in this paper. The projects presented incl...
This paper presents the work that was accomplished in preparing multimedia products for cultural heritage interpretation and entertainment. Data fusion techniques were applied to three cases: the remains of Temple C of Selinunte, Sicily, the Byzantine Crypt of Santa Cristina, Apulia and a bronze sculpture from the 6th century BC found in Ugento, Ap...
The Grotta dei Cervi is a complex and fragile Neolithic cave where human presence left a large number of unique pictographs and petroglyphs. Detailed documentation necessitates recording it at different levels of details or spatial resolutions. A general approach would entail a combination of 3D data from different 3D sensors and information from d...
When presenting the history of a heritage site or an artefact using multimedia technology, the proper use of technology to acquire and represent spatial information is crucial in order to facilitate the understanding of that particular site and the relationship between the elements constituting that site. In many cases, one has to model complex env...
The National Research Council of Canada (NRC) has developed a range of 3D imaging technology tools, which have been applied to a wide range of museum and heritage recording applications. The technology suite includes the development of high-resolution laser scanner systems as well as software for the preparation of accurate 3D models and for the di...
This paper presents a set of tools developed to model, visualize and analyze large 3D datasets built from 2D and 3D sensor data. These tools, grouped under the Atelier3D framework, first include a technique for processing and interactively visualizing datasets made of hundreds of millions 3D samples and tens of gigabytes of texture from digital pho...
This paper presents the usefulness and utility of three complementary digitisation techniques for the dynamic rendering of colour, roughness and shape of easel paintings. The 2D multi-spectral digitisation and the 3D modelling of paintings are used for colour accuracy rendering and measurement, colour characterisation, pigment identification, for h...
Digitally reconstructing a large and complex heritage site, for example a medieval castle, for documentation and virtual reality simulation is a challenging task that requires combining models created by different data sets from several digitisation technologies. Our approach resembles the level of detail (LOD) concept used in visualization of comp...
The use of 3D digitization and modeling in documenting heritage sites has increased significantly over the past few years. This is mainly due to advances in laser scanning techniques, 3D modeling software, image-based-modeling techniques, computer power, and virtual reality. There are many approaches currently available. The most common remains bas...
The National Research Council of Canada (NRC) has collaborated with numerous Canadian and international heritage institutions on the development of a complete suite of 3D imaging technologies for archival quality imaging, analysis and display of 3D models of museum objects and heritage sites including ancient crypt and grottos. The technology inclu...
This paper presents a summary of the 3-D modelling work that was accomplished in preparing multimedia products for cultural heritage interpretation and entertainment. The two cases presented are the Byzantine Crypt of Santa Cristina, Apulia and temple C of Selinunte, Sicily. The core of the approach is based upon high-resolution photo-realistic tex...
In active laser range finders, the computation of the (x, y, z) coordinates of each point of a scene can be performed using the detected centroid p~ of the image spot on the sensor. When the reflectance of the scene under analysis is uniform, the intensity profile of the image spot is a Gaussian and its centroid is correctly detected assuming an ac...
The use of 3D digitization and modeling in documenting heritage sites has increased significantly over the past few years. This is mainly due to advances in laser scanning techniques, 3D modeling software, image-based-modeling techniques, computer power, and virtual reality. There are many approaches currently available. The most common remains bas...
In last decade, we have witnessed an increased number of publications related to systems that combine laser scanning and closerange photogrammetry technologies in order to address the challenges posed by application fields as diverse as industrial, automotive, space exploration and cultural heritage to name a few. The need to integrate those techno...
A novel architecture of optical sensor developed for flying-spot active triangulation will be presented The architecture implements a spot position calculation based on a two steps procedure allowing for increased readout speed and color detection. The proposed sensor has been fully integrated in standard CMOS technology and is currently under test...
Over the past few years, a remarkable increase has occurred in the demand for 3D models for cultural heritage applications. The techniques employed have evolved from surveying and CAD tools and/or traditional photogrammetry into laser scanning and more automated image-based techniques. However, selecting the most effective technique for a given pro...
The three-dimensional acquisition and modeling of Donatello's Maddalena was started in order to create a methodology that aims at monitoring fragile wooden sculptures over the years. Hence a set of new approaches in 3D modeling was needed for obtaining the necessary metric reliability. The main focus of the work is modeling accuracy, therefore qual...
This paper presents our activities on VLSI optosensors optimized for three-dimensional vision. A description of the integrated devices jointly developed for industrial and scientific applications will be given. All the sensors presented here have been fabricated using standard CMOS technology that allows the monolithic integration of photo-sensors,...
The National Research Council of Canada (NRC) has developed and patented three high-resolution 3D imaging systems and processing algorithms which have been applied to a wide range of museum and heritage recording applications. The systems have been designed for different imaging applications and, in collaboration with a number of national and inter...
Automated digital photogrammetric systems are considered to be passive three-dimensional vision systems since they obtain object coordinates from only the information contained in intensity images. Active 3-D vision systems, such as laser scanners and structured light systems obtain the object coordinates from external information such as scanning...
3D modelling of heritage monuments has increased significantly due to advances in laser scanners, 3D modelling software and computers. The main approaches today are interactive and automatic photogrammetry, terrestrial laser ranging and image rendering. The authors discuss each approach, pointing out its advantages and disadvantages. They then pres...
The generation of three-dimensional (3-D) digital models produced by optical technologies in some cases involves metric errors. This happens when small high-resolution 3-D images are assembled together in order to model a large object. In some applications, as for example 3-D modeling of Cultural Heritage, the problem of metric accuracy is a major...
This paper presents the work that was accomplished in preparing a multimedia CDROM about the history of a Byzantine Crypt. An effective approach based upon high-resolution photo-realistic texture mapping onto 3D models generated from range images is used to present the spatial information about the Crypt. Usually, this information is presented on 2...
The present paper proposes a virtual environment for visualizing virtualized cultural and historical sites. The proposed environment is based on a distributed asynchronous architecture and supports stereo vision and tiled wall display. The system is mobile and can run from two laptops. This virtual environment addresses the problems of intellectual...
This paper presents the 3D modelling work that was accomplished in preparing a multimedia CDROM about the history of a Byzantine Crypt. An effective approach based upon high-resolution photo-realistic texture mapping onto 3D models generated from range images is used to present the spatial information about the Crypt. Usually, this information is p...
This paper presents the work leading to the launch of a laboratory for digital 3D imaging dedicated to the establishment of a permanent digital heritage preservation centre in Florence. By applying the latest non-contact 3D technologies and methodologies, this center intends to create a bridge between expectations of art historians and curators, an...
Advances in the 3D sensing of dynamics and unstructured environments require the development of intelligent systems, algorithms, and methods to replace or at least minimize the human intervention to the 3D acquisition process. From the user point of view, most existing 3D acquisition systems still require static techniques that can be considered ar...
In this paper, we compare the accuracy and resolution of a 3D-laser scanner prototype that tracks in real-time and computes the relative pose of objects in a 3D space. This 3D-laser scanner prototype was specifically developed to study the use of such a sensor for space applications. The main objective of this project is to provide a robust sensor...
The National Research Council of Canada (NRC) has developed three families of high resolution 3D imaging systems which have been applied to a variety of museum and heritage recording projects. Several of these projects have been undertaken in collaboration with European museums and cultural organizations as well as with several other international...
In spite of an undoubted richness of information produced by 3D optical technologies, in some cases, the method for generating a digital model from single 3D acquisitions involves the propagation of errors. These errors limit the overall metric accuracy attainable with such procedure. This happens when small 3D images are assembled together in orde...
Summary form only given. The National Research Council of Canada (NRC) has developed several high-resolution 3D imaging systems as well as data modeling and display software for heritage recording applications. Numerous pilot applications development projects have been undertaken in collaboration with several Canadian museums as well as with intern...
In recent years, high-resolution recording of heritage sites has stimulated a lot of research in fields like photogrammetry, computer vision, and computer graphics. Numerous algorithms and methodologies have been proposed in the literature. In practice, what a 3D photographer needs is a commercially available solution to this so-called as-built doc...
The Neptec Design Group has developed the Laser Camera System (LCS), a new 3D laser scanner for space applications, based on an auto-synchronized principle from the National Research Council of Canada (NRC). The LCS was tested in August 2001 during mission STS-105 of the space shuttle Discovery to the International Space Station. Significant design...
The National Research Council of Canada (NRC) has developed and patented three high resolution 3D imaging systems which have been applied to several museum and heritage recording applications. Each system is designed for different imaging applications and, in collaboration with several national and international museums and cultural agencies, has b...
In recent years, high-resolution recording of heritage sites has stimulated a lot of research in fields like photogrammetry, computer vision, and computer graphics. Numerous algorithms and methodologies have been proposed in the literature for heritage recording from photogrammetry and laser scanner 3D data. In practice, what a 3D photographer need...
This paper presents our activities on smart VLSI opto-sensors for
3D vision. A description of the integrated devices jointly developed for
industrial and scientific applications is given. All the sensors
presented here have been fabricated using standard CMOS technology that
allows the monolithic integration of photo-sensors, together with
readout...
3D optical scanning technologies for measuring tridimensional shapes of sculptures have emerged in the last few years as the most promising methods for digital analysis and preservation of cultural heritage. This paper presents the work leading to the generation of the digital 3D model of Donatello's Maddalena, kept in the museum of the Opera del D...
An important application of laser range sensing is found in the 3D scanning and modelling of heritage collections, and of sculptures in particular. Since a significant proportion of the statues in the world's museums is composed of marble, the optical properties of this material under laser range sensing need to be understood. Marble's translucency...
In this paper, we compare the accuracy and resolution of a 3D-laser scanner prototype that tracks in real-time and computes the relative pose of objects in a 3D space. This 3D-laser scanner prototype was specifically developed to study the use of such a sensor for space applications. The main objective of this project is to provide a robust sensor...
This paper focuses on the characteristics and performance of an eye-safe laser range scanner (LARS) with short- and medium-range 3-D sensing capabilities for space applications. This versatile LARS is a precision measurement tool that will complement the current Canadian Space Vision System. The major advantages of the LABS over conventional video-...
Active three-dimensional vision is concerned with extracting information from the geometry and the texture of the visible surfaces in a scene, reasoning about the data and finally, communicating the results. With the recent technological advances made in electronics, photonics, computer vision and computer graphics, it is now possible to construct...
This paper presents the development of a laser range scanner (LARS) as a three-dimensional sensor for space applications. The scanner is a versatile system capable of doing surface imaging, target ranging and tracking. It is capable of short range (0.5 m to 20 m) and long range (20 m to 10 km) sensing using triangulation and time-of-flight (TOF) me...
Selecting the appropriate 3-D capture and modeling technologies to create the contents of a virtual environment (VE) remains a challenging task. One of the objectives of the environment-modeling project in our laboratory is to develop a design strategy for selecting the optimum sensor technology and its configuration to meet the requirements for vi...
A portable digital 3D imaging system based on laser triangulation
was designed for the accurate documentation of environments and objects
located in remote sites. Cultural heritage and industrial applications
are among the best candidates to benefit from this new technology. This
paper focuses on such aspects as the acquisition, display,
calibratio...
A system that can rapidly, reliably, remotely and accurately create a photo-realistic 3D model of indoor environments is needed for many applications. In this paper, we present a mobile mapping system that is designed to generate such models automatically from various sensors. Surfaces and features can be accurately mapped from images acquired by a...
This paper describes the parameters and method used to calibrate an anamorphic lens specially designed for a 3-D triangulation based laser range sensor. It expands the more conventional spherical lens calibration technique that has been developed in photogrammetry to include the extra distortions introduced by the strong astigmatism and by the di...
This talk summarizes the conclusions of a few of these laser scanning experiments on remote sites and the potential of the technology for imaging applications. Parameters to be considered for these types of activities are related to the design of a large volume of view laser scanner, such as the depth of field, the ambient light interference (espec...
Virtual environments (VEs) also known as virtual reality (VR) are increasingly being considered for industrial, medical, and educational / training applications, to name a few. A VE provides real-time interaction with 3-D models when combined with a display technology that gives the user immersion in the model world and direct manipulation of objec...
Due to the nature of many applications, it is difficult with present technology to use a single type of sensor to automatically, accurately, reliably, and completely measure or map, in three-dimensions, objects, sites, or scenes. Therefore, a combination of various sensor technologies is usually the obvious solution. There are several 3-D technolog...
Active 3-D vision systems, such as laser scanners and structured light systems, obtain the object coordinates from external information such as scanning angles, time of flight, or shape of projected patterns. Passive systems require well-defined features such as targets and edges and are affected by ambient light. Therefore, they have difficulty wi...
This paper discuses the development of a short wavelength infrared laser ranging scanner system at the Canadian Space Agency in cooperation with the National Research Council Canada. A laser source at 1.54 micrometers wavelength is chosen for its relatively eye-safe property. The scanner system is to be considered for use as a space vision system f...
This paper discuses the development of a short wavelength infrared laser ranging scanner system at the Canadian Space Agency in cooperation with the National Research Council Canada. A laser source at 1.54 micrometers wavelength is chosen for its relatively eye-safe property. The scanner system is to be considered for use as a space vision system f...
This paper presents the preliminary design of a VLSI chip to
support and efficiently implement the calibration operations of a 3-D
camera based on the principle of autosynchronized triangulation. This
VLSI chip supports several operations for every incoming data and
targets a performance between 1 and 10 millions 3-D points (x, y, z) per
second
Conventional vision techniques based on intensity data, such as the data produced by CCD cameras, cannot produce complete 3D measurements for object surfaces. Range sensors, such as laser scanners, do provide complete range data for visible surfaces; however, they may produce erroneous results on surface discontinuities such as edges. In most appli...
Conventional vision techniques based on intensity data, such as the data produced by CCD cameras, cannot produce complete 3D measurements for object surfaces. Range sensors, such as laser scanners, do provide complete range data for visible surfaces; however, they may produce erroneous results on surface discontinuities such as edges. In most appli...
A real-time laser scanner for object recognition, inspection, and robot control is presented in this paper. Range and intensity images are generated in perfect registration at a rate of 10 Mega-samples per second. Images have a resolution of 483 lines each having 512 pixels. Owing to its compatibility with the video standard RS-170, the range camer...
This paper presents a calibration procedure adapted to a range camera intended for space applications. The range camera, which is based upon an auto-synchronized triangulation scheme, can measure objects from about 0.5 m to 100 m. The field of view is 30 degree(s) X 30 degree(s). Objects situated at distances beyond 10 m can be measured with the he...
Introduces a new method for the calibration of a range camera
based on active triangulation. The technique is based on a model derived
from the geometry of the synchronized scanner. From known positions of a
calibration bar, a logistic equation is fitted with values of spot
positions read from a linear position detector at a number of angular
posit...
The design and fabrication of a position-sensing photodetector
that is sensitive to a wavelength of 1.55 μm are reported. This
device is based on the photo-lateral effect and uses an
In<sub>0.53</sub>Ga<sub>0.47</sub>As absorbing layer that is lattice
matched to an InP substrate. The output signal ( I <sub>1</sub>-
I <sub>2</sub>)/( I <sub>1</sub>+...
A real-time implementation of the range sensor called BIRIS (for
bi-iris) on a commercially available image processing system is
described. The optical principle of the range sensor and its performance
is reviewed. The high immunity of the sensor to ambient illumination and
external perturbations is also demonstrated. The different options
availabl...
Laser range finders can be used in a variety of geometries to
match requirements of applications such as robot vision, inspection,
prosthesis fabrication, CAD/CAM, computer graphics, and automatic
assembly. A review is presented of the development of five prototypes
which have specified advantages for a class of applications. One of
these is based...
A one-dimensional systolic array realizing the discrete Fourier
transform (DFT) of nonstop input sequences is presented. Two arrays
having different output schemes, i.e. pipelined and bus-oriented output
paths, are introduced. Both arrays require N cells and take
N clock cycles to produce a complete N -point DFT. The
latency time for the pipeline s...