Abstract: A method and device to simulate, visualize and compare 3D surfaces Method and device to visualize a composition of two matched surface models (M1) and (M2) in order to privilege the visualization of the silhouette of the second representation (R2) of the second surface model (M2), that is, the surface elements which are the most tangent to the viewing direction defined by the optical center (C) of a virtual camera and the point (P) of the surface of the second surface model (M2) considered, and to visualize it by transparency on top of the first surface model (M1). The disclosure is intended in particular to compare anatomical subjects before and after simulation or surgical or aesthetic procedures.

Abstract: The method and device are intended to prove the posteriority date (P) and anteriority date (A) of a digital image (IN) including building with a first server a previously unknown code (C) and transmitting this code (C) at the posteriority date (P), acquiring the digital image including a joint representation of a subject (S) and the code (C), computing an electronic fingerprint (EIN) of the digital image (IN), receiving with a second server at the anteriority date (A) the electronic fingerprint (EIN), inserting a combination (EIN+A) of the electronic fingerprint (EIN) and the anteriority date (A) in a block chain and possibly retrieving and sending back with a third server the recorded posteriority (P) and anteriority (A) dates from the reception of a new digital image (IN2). The disclosure is intended in particular to prove with images the correct performance of clinical protocol steps in clinical trials.

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: Method and device to visualize a composition of two matched surface models (M1) and (M2) in order to privilege the visualization of the silhouette of the second representation (R2) of the second surface model (M2), that is, the surface elements which are the most tangent to the viewing direction defined by the optical center (C) of a virtual camera and the point (P) of the surface of the second surface model (M2) considered, and to visualize it by transparency on top of the first surface model (M1). The disclosure is intended in particular to compare anatomical subjects before and after simulation or surgical or aesthetic procedures.

Abstract: The device and method are intended for reconstructing in 3-Dimensions a complete 360° loop of a subject (30). The device and method is comprising using a passive stereovision 3D camera (10) and either a turn table (20) or alternatively a rotating frame (21) carrying the 3D camera in order to acquire a set of stereo pairs covering a complete 360° loop around the subject (30) and enabling reconstructing (60) the 3D surfaces and associated texture images associated to said stereo pairs and to stitch (80) these 3D surfaces into a comprehensive 3D surface with associated texture image in order to represent over 360° the imaged subject (30). The invention is particularly intended for the 3D reconstruction of 360° loops of the body of people for measurement and surgical simulation in aesthetics.

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: The method and device are intended to prove the posteriority date (P) and anteriority date (A) of a digital image (IN) including building with a first server a previously unknown code (C) and transmitting this code (C) at the posteriority date (P), acquiring the digital image including a joint representation of a subject (S) and the code (C), computing an electronic fingerprint (EIN) of the digital image (IN), receiving with a second server at the anteriority date (A) the electronic fingerprint (EIN), inserting a combination (EIN+A) of the electronic fingerprint (EIN) and the anteriority date (A) in a block chain and possibly retrieving and sending back with a third server the recorded posteriority (P) and anteriority (A) dates from the reception of a new digital image (IN2). The disclosure is intended in particular to prove with images the correct performance of clinical protocol steps in clinical trials.

Abstract: The device and method are intended for the standardization of picture taking without contact with the subject. Two light beamers converging at a distance within the range of camera focus are enabling reproducible viewing conditions via superimposition of the spots of the beamers on the subject and the light of the beamers are extinguished during picture taking in order not to bias the image. The device is constituted of a body (1) adaptable to a camera (1) with objective (2) and is including two light beamers (4A) and (4B) whose beams (5A) and (5B) are converging at a distance (D) within the focus range of the camera as well as a mechanism to extinguish the light beamers during picture taking. It can be improved by enabling the covering of the focus ring (2) and zoom ring (8) of camera (1).

Abstract: The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

Abstract: A stereophotogrammetry device intended to reduce the 3D surface reconstruction artifacts due to specular reflections when a unique camera body is used. Indeed, specular reflection of the camera flash on shiny objects are creating virtual objects in the scene inducing spikes in reconstruction. The device is constituted of a computing unit (C) enabling 3D reconstruction, a unique camera body (5) equipped with a non-polarized double-optics (OA) and (OB) and two light sources (2A) and (2B) separated by the same distance as the double-optics and aligned with these such that (2A) is aligned with (OA) and (2B) is aligned with (OB) relative to the subject (S). According to geometry considerations, the computing unit (C) is defining the best matching amongst four possible matches relative to the specular spot position.

Abstract: The device and method are intended for the standardization of picture taking without contact with the subject. Two light beamers converging at a distance within the range of camera focus are enabling reproducible viewing conditions via superimposition of the spots of the beamers on the subject and the light of the beamers are extinguished during picture taking in order not to bias the image. The device is constituted of a body 3 adaptable to a camera 1 with objective 2 and is including two light beamers 4A and 4B whose beams 5A and 5B are converging at a distance D within the focus range of the camera as well as a mechanism to extinguish the light beamers during picture taking. It can be improved by enabling the covering of the focus ring 2 and zoom ring 8 of camera 1.

Abstract: The invention is a stereophotogrammetry device intended to reduce the 3D surface reconstruction artefacts due to specular reflections when a unique camera body is used. Indeed, specular reflection of the camera flash on shiny objects are creating virtual objects in the scene inducing spikes in reconstruction. The device is constituted of a computing unit enabling 3D reconstruction, a unique camera body 5 equipped with a non-polarized double-optics OA and OB and two light sources 2A and 2B separated by the same distance as the double-optics and aligned with these such that 2A is aligned with OA and 2B is aligned with OB relative to the subject S. According to geometry considerations, the computing unit is defining the best matching amongst four possible matches relative to the specular spot position.

Abstract: A device includes a registration module that determines a registration transformation between a first set of data of a first image and a second set of data of a second image. A sampling module re-samples the first set of data into a third set of data able to be superposed directly, sample by sample, on the second set of data. A processing module determines, starting from the second and third set of data, a set of difference data representing differences between superposable areas of the images constituted by the second and third sets of data.

Abstract: A device comprises means (10) for determining a registration transformation between a first set of data of a first image and a second set of data of a second image, means (20) for re-sampling the first set of data into a third set of data able to be superposed directly, sample by sample, on the second set of data, processing means (30) for determining, starting from the second and third set of data, a set of difference data representing differences between superposable areas of the images constituted by the second and third sets of data.

Abstract: An image is defined, in correspondence with a predetermined polyhedral meshing of a portion of the space, by a numerical value for each vertex of the meshing. Polygon processing includes receiving a representation of a plane polygon with p vertices, p respective values for these p vertices, and a threshold. In correspondence with the polygon, polygon processing supplies a list of oriented segments linking points of the edges of the polygon which are interpolated as being equal to the threshold, with a predetermined direction convention. Polyhedron processing includes receiving a representation of a polyhedron with the values at its vertices and a threshold. Polyhedron processing then invokes polygon processing for all the faces of the polyhedron, which supplies a list of oriented segments. Polyhedron processing then associates with the polyhedron a list of closed and oriented cycles, constituted by segments from the said list of segments.

Abstract: An apparatus for assisting with examining a body emitting wavebeams includes sensors to collect wavebeams along a plurality of respective axes termed "acquisition lines" and to transform the collected wavebeams into signals defining an image of projections of at least part of the body. The signals represent the intensity of the wavebeams. Differences between selected ones of the signals relative to the axis parameters are determined. Each jump in the intensity of the signals determines a critical point corresponding to an acquisition line tangential to a boundary of the body. The axis parameters of the critical points identify a position of at least one portion of the boundary.

Abstract: A digital modem is connected to a CBX in a network. Data is transmitted to the digital modem in a data field of synchronous serial data frames. The digital modem converts the data into a digital signal corresponding to a time sampled analog signal representing the data. The converted digital signal is communicated to a digital to analog converter for transmission on a telephone line. Analog signals received on the telephone line are digitized, and then converted to data in the digital modem.