Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2008
This paper presents a method to evaluate a gesture carried out by a resident obstetrician by comp... more This paper presents a method to evaluate a gesture carried out by a resident obstetrician by comparing it to a gesture carried out by an expert obstetrician. The studied gesture is the forceps blade placement. Resident paths were recorded on a childbirth simulator while placing forceps blades instrumented with six degrees of freedom sensors. The path is characterized by the positions and the orientations. In this paper we particularly focus on the orientations. Forceps orientations are expressed in the quaternion unit space and the curvature of quaternion path is compared by correlation to a reference defined by an expert. Residents have been trained on a simulator and their gestures are evaluated by comparing their orientation path curvatures to reference path curvatures. Quantitative results confirm the qualitative analysis, residents become more similar to the reference while training on simulator.
This paper describes recent improvements to the Biris optical range sensor and the application of... more This paper describes recent improvements to the Biris optical range sensor and the application of the technology for the estimation of volume with emphasis on wood volume measurement. A description of the range sensor and the algorithms used to calculate the volume from range data are given. Two techniques are presented: 1) evaluation of volume using model fit, and, 2) evaluation of volume directly from raw range data.
[1989] Proceedings. Workshop on Interpretation of 3D Scenes
Laser range finders can be used in a variety of geometries to match requirements of applications ... more 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 on the use of a mask with
Abstract We present an integrated interface that takes advantage of several VR technologies for t... more Abstract We present an integrated interface that takes advantage of several VR technologies for the exploration of small artifacts in a Museum. This interface allows visitors to observe pieces in 3D from several viewpoints, touch them, feel their weight, and hear their sound ...
While performance based animation has been widely used in film and game production, we apply a si... more While performance based animation has been widely used in film and game production, we apply a similar technique for recreational/artistic performance purposes, allowing users to experience real-time natural interaction with virtual character. We present a real-time system that allows a user to interact with a synthetic virtual character animated based on the performance of a dancer who is hidden behind
A laser scanner is used to produce a digital range image which is sine wave coded and Fourier tra... more A laser scanner is used to produce a digital range image which is sine wave coded and Fourier transformed to obtain an efficient segmentation discussed.
Recent progress in real-time tracking of knee bone structures from fluoroscopic imaging using CT ... more Recent progress in real-time tracking of knee bone structures from fluoroscopic imaging using CT templates has opened the door to studying knee kinematics to improve our understanding of patellofemoral syndrome. The problem with CT imaging is that it exposes patients to extra ionising radiation, which adds to fluoroscopic imaging. This can be solved by segmenting bone templates from MRI instead of CT by using a deep neural network architecture called 2.5D U-Net. To train the network, we used the SKI10 database from the MICCAI challenge; it contains 100 knee MRIs with their corresponding annotated femur and tibia bones as the ground truth. Since patella tracking is essential in our application, the SKI10 database was augmented with a new label named UofA Patella. Using 70 MRIs from the database, a 2.5D U-Net was trained successfully after 75 epochs with an excellent final Dice score of 98%, which compared favourably with the best state-of-the-art algorithms. A test set of 30 MRIs wer...
The delivery of cultural heritage using web-accessible formats has been a limited success. The am... more The delivery of cultural heritage using web-accessible formats has been a limited success. The amount of information that can be displayed using standard web technologies remains limited to a disjointed set of text, images, short movie clips, Quick Time VR, and more recently, small 3D worlds and models represented in VRML format. What is really needed is a new technology that will be able to deliver heritage content into a more compelling storytelling form that is as rich as cinema but without its limitations of linear narrative and its inability to interact with its content. This paper presents some solutions to those issues by considering the continuum of technology necessary to deal with the creation, management, and delivery of cultural heritage content.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2008
This paper presents a method to evaluate a gesture carried out by a resident obstetrician by comp... more This paper presents a method to evaluate a gesture carried out by a resident obstetrician by comparing it to a gesture carried out by an expert obstetrician. The studied gesture is the forceps blade placement. Resident paths were recorded on a childbirth simulator while placing forceps blades instrumented with six degrees of freedom sensors. The path is characterized by the positions and the orientations. In this paper we particularly focus on the orientations. Forceps orientations are expressed in the quaternion unit space and the curvature of quaternion path is compared by correlation to a reference defined by an expert. Residents have been trained on a simulator and their gestures are evaluated by comparing their orientation path curvatures to reference path curvatures. Quantitative results confirm the qualitative analysis, residents become more similar to the reference while training on simulator.
This paper describes recent improvements to the Biris optical range sensor and the application of... more This paper describes recent improvements to the Biris optical range sensor and the application of the technology for the estimation of volume with emphasis on wood volume measurement. A description of the range sensor and the algorithms used to calculate the volume from range data are given. Two techniques are presented: 1) evaluation of volume using model fit, and, 2) evaluation of volume directly from raw range data.
[1989] Proceedings. Workshop on Interpretation of 3D Scenes
Laser range finders can be used in a variety of geometries to match requirements of applications ... more 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 on the use of a mask with
Abstract We present an integrated interface that takes advantage of several VR technologies for t... more Abstract We present an integrated interface that takes advantage of several VR technologies for the exploration of small artifacts in a Museum. This interface allows visitors to observe pieces in 3D from several viewpoints, touch them, feel their weight, and hear their sound ...
While performance based animation has been widely used in film and game production, we apply a si... more While performance based animation has been widely used in film and game production, we apply a similar technique for recreational/artistic performance purposes, allowing users to experience real-time natural interaction with virtual character. We present a real-time system that allows a user to interact with a synthetic virtual character animated based on the performance of a dancer who is hidden behind
A laser scanner is used to produce a digital range image which is sine wave coded and Fourier tra... more A laser scanner is used to produce a digital range image which is sine wave coded and Fourier transformed to obtain an efficient segmentation discussed.
Recent progress in real-time tracking of knee bone structures from fluoroscopic imaging using CT ... more Recent progress in real-time tracking of knee bone structures from fluoroscopic imaging using CT templates has opened the door to studying knee kinematics to improve our understanding of patellofemoral syndrome. The problem with CT imaging is that it exposes patients to extra ionising radiation, which adds to fluoroscopic imaging. This can be solved by segmenting bone templates from MRI instead of CT by using a deep neural network architecture called 2.5D U-Net. To train the network, we used the SKI10 database from the MICCAI challenge; it contains 100 knee MRIs with their corresponding annotated femur and tibia bones as the ground truth. Since patella tracking is essential in our application, the SKI10 database was augmented with a new label named UofA Patella. Using 70 MRIs from the database, a 2.5D U-Net was trained successfully after 75 epochs with an excellent final Dice score of 98%, which compared favourably with the best state-of-the-art algorithms. A test set of 30 MRIs wer...
The delivery of cultural heritage using web-accessible formats has been a limited success. The am... more The delivery of cultural heritage using web-accessible formats has been a limited success. The amount of information that can be displayed using standard web technologies remains limited to a disjointed set of text, images, short movie clips, Quick Time VR, and more recently, small 3D worlds and models represented in VRML format. What is really needed is a new technology that will be able to deliver heritage content into a more compelling storytelling form that is as rich as cinema but without its limitations of linear narrative and its inability to interact with its content. This paper presents some solutions to those issues by considering the continuum of technology necessary to deal with the creation, management, and delivery of cultural heritage content.
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Papers by P. Boulanger