• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a portable device and a method for taking stereophotogrammetric shots at two predefined distances. The device consists of a camera (1) equipped with a dual optics (2) and a distance measuring system (3,4) for positioning the subject (S) at two predetermined distances. (A4) and (A3). A switch (5) is able to select one of the two distances. It will be advantageous for the depth of field (6) of the device to be able to contain the positions (A4) and (A3). The method uses the device by selecting one of two distances and relatively placing the device and the subject. The invention is particularly intended for the three-dimensional reconstruction of the surface of the face and the torso by means of a portable stereophotogrammetry device.
    公开号:FR3042610A1
    申请号:FR1502170
    申请日:2015-10-14
    公开日:2017-04-21
    发明作者:Jean Philippe Thirion
    申请人:QUANTIFICARE；
    IPC主号:
    专利说明:

    The present invention relates to a preferably portable stereophotogrammetry device and method for acquiring, reconstructing and measuring features and three-dimensional variations of the surface of the head and the body.
    In plastic surgery, it is necessary to be able to reconstruct in three dimensions the surface of a part of the body in order to measure the geometrical characteristics of the subjects, to analyze their forms, to simulate surgical operations and also to acquire 3D surfaces of the body. body over time in order to compare and measure geometric variations.
    Plastic surgeons are particularly interested in the surface of the face for rhinoplasty-like operations or for facelift-type operations and breast and breast surfaces for breast surgery operations. Surgeons are also interested in other areas of the body such as the buttocks, hips, neck, sternum area, hands and other areas. It should be noted that these needs require significant variations in the size of the field of view. The surface of a complete torso is much larger than the surface of a face.
    Stereophotogrammetry consists in collecting the images of a subject according to at least two different angles of view by means of a calibrated camera, that is to say, whose geometry of the optic is perfectly known. When two images are acquired simultaneously, we speak of a stereoscopic pair or "stereo pair" and finding points of correspondence between the two images of the stereo pair by correlation type algorithms, it is possible by triangulation to reconstruct a representation dense three-dimensional surface of the examined object.
    Optical calibration is one of the key steps required for accurate three-dimensional reconstruction. The geometric precision to be achieved for the manufacture of the optics is such that it is not practically possible to have moving parts in these optics, which means that the stereophotogrammetry devices used for the reconstruction of anatomical surfaces have a fixed focusing plane defining, by means of an aperture, a field of fixed depth around the plane of focus. This results in a fixed field of view.
    Thus, those skilled in the art will use an optical system having a focus distance corresponding to a field of view approximately equivalent to an A4 format for facial shots. He will use a second optical system corresponding to a field of view approximately equivalent to an A3 format for the shots of the chest. This makes that in practice, one skilled in the art will use two separate devices for the acquisition of a part of the faces and the other of the chest and breasts.
    It is necessary to provide the camera with a means of positioning the subject at the distance corresponding to the plane of focus. One way to achieve this fixed repositioning distance will be to use wine-based portable stereophotogrammetry system as described in "MAVIS: a non-invasive instrument to measure area and volume of wounds. Measurement of Area and Volume Instrument System. ", Plassmann P, Jones TD, Med Eng Phys 1998, -20 (5) - 332-8. This stereophotogrammetry system is provided with a pair of luminous projectors converging at the focusing distance of the camera.
    In the case of a curved anatomical surface such as the face or the chest, some important parts are not visible simultaneously by the two optics of the stereophotogrammetry system because of the curvature of the subject and this regardless of the field width of the device. As a result, some parts of the subject can not be reconstructed in three dimensions from a single stereo shot. It is for this reason that multi-head static systems have been developed in order to simultaneously take several different stereo shots of the same subject, so as to cover blind spots. By calibrating the position of the different heads using patterns, it is possible to patch the different surfaces reconstructed to obtain a single surface without hidden part of the head or chest of the subject. This technique of patching, very delicate and difficult to achieve, is called "stitching" in English. It was originally used to patch various classic two-dimensional photographs in order to reconstruct panoramas from multiple shots, then was extended to 3D surfaces and their respective textures to make a single 3D surface representation from several different 3D surface pieces. Typically, these multi-head static systems use three to four stereo heads depending on the applications.
    The LifeViz II, as described in "Exhibition Watch Report -In-Cosmetics 2013", 2013, XP055139703, Paris, page 8 and 9, is a system to which the author of the present invention has contributed and which comprises on the one hand a portable stereophotogrammetry apparatus with light pointers and on the other a calculating means for patching the surfaces obtained for different stereo shots in order to reconstruct in three dimensions the entire surface of a face or chest. The difficulty solved by this portable system has been to patch different shots taken at different times and angles that are not perfectly known, unlike multi-head fixed systems for which different shots are obtained at the same time and the relative positions of the heads are perfectly known by calibration. For the development of the LifeViz II, it was necessary to develop new surface matching algorithms to automatically find unknown angles of view, to merge texture maps taken with different lighting and surfaces. may have distorted slightly between shots due to slight movements or deformations of the subject between each shot. The LifeViz II system is the state of the art in the field of portable stereophotogrammetry systems. It remains limited by the fact that in manufacturing, it must be optimized for a fixed shooting distance. Thus, there are models of stereophotogrammetry devices optimized for facial reconstruction and for which the field of view is approximately the size of an A4 format, and other models optimized for the reconstruction of the torso and for which the field of view is approximately the size of an A3 format.
    Indeed, with a field of view of approximately a size corresponding to the A4 format, the face can be covered in three or four shots. With a restricted field in A4 format and as with a portable device it is necessary to have a large overlap of the different surfaces to match them, the use for the torso would require in practice too many A4 sockets, which would be more difficult to position in space with respect to each other. By having a system with a field of view corresponding to the A3 format and to avoid hidden parts, one can cover the surface of a torso by means of five taken with a relatively simple definition of positioning. If you have a portable device with a field of view in A3 format, you can also acquire images with the same system for reconstructing the face, but then the resolution is much worse than with a system dedicated to the face because in a field in A3 format, the surface used in the image to represent the face is very small and you lose many pixels become useless.
    In conclusion, the portable stereophotogrammetry devices currently developed have only one nominal shooting distance that is optimized for either the face or the torso, but which is not optimized for both applications at the same time. Those skilled in the art of using portable ion system for both head and torso applications simultaneously will utilize a torso-optimized system that will lose precision when seeking to reconstruct face surfaces.
    The object of the present invention is to remedy this problem with a preferably portable stereophotogrammetry device and a method using this device optimized for two different shooting distances. The apparatus may advantageously be worn by a user, and for example weigh less than two kilograms.
    The stereophotogrammetry device is capable of being worn and consists of a camera equipped with a dual optics for obtaining two simultaneous shots at a different angle. It has more than one distance measuring system with at least two distinct predefined distances for shooting.
    It will be advantageous if these two predefined distances are included in the part of the space for which the focus of the image is clear, ie the repositioning positions of the subject is within the depth of field of the stereophotogrammetry apparatus. The dual optics of the stereophotogrammetry system can be realized in different ways without affecting the nature of the invention as long as it guarantees a great depth of field. The dual optics may include a lens system and an image separator made from a set of mirrors. In this case, it will be advantageous to have a set of two secondary mirrors each for taking a shot at a slightly different angle and each returning their image of the subject on a corresponding and opposite set of two primary mirrors each returning his image on a photosensitive surface through a lens system. This lens system may be single or split, with a different lens subsystem for each of the images of the stereo pair or a single lens system receiving the two images from the primary mirrors. Alternatively, the dual optics may comprise two separate optical systems such as two different lenses each returning a shot taken at a different angle on a single or split photosensitive surface.
    In a variant of the invention, the device will be provided with at least two pairs of light projectors, each pair of projectors converging at a different distance. Thus, by placing the subject in such a way as to superimpose the light patterns projected by a first pair of light projectors, the first shooting distance is made and the subject is placed so as to superimpose the light patterns projected by a second pair of lights. illuminated projectors, the second shooting distance is achieved.
    In another variant of the invention, the device will be provided with a pair of luminous projectors whose convergence distance is adjustable so that by changing the convergence settings the user is able to converge the two illuminated projectors at least two different distances. The advantage of such a system is that the definition of the shooting distance can be made by setting at the time of use for many more predefined distances possible and therefore is not fixed at only two distances to the manufacture of the device as in the case of two pairs of fixed luminous projectors. The disadvantage with respect to two separate pairs of luminous projectors is that it is more difficult in this case to ensure the reproducibility of the adjustment in position because with an adjustable device there may be a risk of involuntarily obtaining intermediate positions. .
    In yet another variant of the invention, the device is provided with a pair of luminous projectors whose patterns are superposable at two different distances. This may be for example two light spots projected by each of the projectors, the outermost light spots of the two projectors to achieve the most distant repositioning distance and the most internal light spots of the two projectors to achieve the repositioning distance closest to the subject. Other light patterns can be envisaged and there will be an advantage in being able to distinguish pattern overlays for both positions by color or shape aspects of the projected patterns. Thus, for example, the inner patterns may be circular and the outer patterns cross-shaped, or the inner patterns may be of one color and the outer patterns of another. In this variant of the invention, the advantage is to have a single pair of luminous projectors without adjustments. Its disadvantage with respect to two separate pairs of luminous projectors is the risk of confusion in the use of the projected patterns.
    Yet another variant of the invention is to have a telemetry system for defining at least two different distances. There are many ways to achieve such a rangefinder, based on the use of infrared, radar waves, or even on the principle of interferometry. The telemetry system may include the display of the measured distance, thus allowing the subject to be placed at predefined nominal distances. The telemetry system may also contain a programming system for triggering a signal when one of the at least two predefined distances is achieved. This signal is to be understood in the broad sense may be an audible signal and / or a visual signal, or even an electromagnetic signal that may be used to trigger the shooting when the desired predetermined distance is achieved. The visual signal may be the turning on or off of a light or even the blinking or non-flashing of the measurement displayed by the range finder or any other visual signal.
    In all these variants of the invention, it may be advantageous to have a switch for selecting one of the at least two predefined shooting distances. Thus, in the case of two pairs of light projectors, the switch will activate in a first position the ignition one of the two pairs and activate in a second position ignition the second pair of light projectors. It may be advantageous to have a third switch position for the extinction of two pairs of projectors, also called "rest" position of the system. In the case of a rangefinder, the switch may allow to select one or the other of the at least two predefined positions programmed on the rangefinder and in this case also it may be advantageous to have a third position of the switch causing the rangefinder to go out.
    In a variant of the invention particularly useful in the case of applications in plastic surgery or aesthetic dermatology, it may be advantageous to adjust the at least two shooting distances so that one of these distances corresponds to a field of view. close-up shooting for one of the distances of the size of A4 paper size, that is, the width and height of shooting at the nominal shooting distance of 29, 7cm by 21cm and for the other distances from a field of view close to a paper size A3, that is to say 42cm by 29.6cm. Indeed, an approximate A4 type field is perfectly suited to shooting faces, while an approximate field type A3 is perfectly suited to the shooting of body parts and in particular the torso.
    Advantageously, the smallest (A4) of the at least two distinct predefined shooting distances corresponds to a first field of view of a smaller area of at least 25% relative to the surface of the field of view. corresponding to a second (A3) of at least two distinct predefined shooting distances.
    Advantageously, one of the at least two predefined shooting distances corresponds to a field of view of a surface of a standardized format A4 within plus or minus 40% and / or another of the at least two predefined distances of Shooting corresponds to a field of view of a surface of a standardized format A3 within plus or minus 40%. One of the technological challenges in the case of the present invention is to provide a stereophotogrammetry device whose depth of field, that is to say the distance separating the two planes between which the image of the subject is clear, is able to cover at least two predefined shooting distances. Indeed, as indicated in the preamble, the accuracy of the calibration of the optical systems necessary for the stereophotogrammetry is generally such that the parts of the optical system are necessarily fixed which results in a fixed position of the plane of focus of the device. In order to achieve a sufficient depth of field to obtain a sharp image at the distance corresponding to the field of view equivalent to the A4 format and at the same time a still sharp image at the distance corresponding to the field of view equivalent to the A3 format, a variant of the invention advantageously uses two separate sets of lenses, with a separate set of lenses for each suboptics of the dual optics, each set of lenses consisting of three aligned lenses corresponding, in the direction of the optical path of the lenses, light rays entering the camera, a plano-convex lens, a double-concave lens and a lens forming an achromatic doublet. In our experiments, this lens composition has been particularly advantageous in achieving a depth of field compatible with both near-A4 views and near-A3 views.
    The method according to the invention consists in implementing the device according to the invention by placing, according to the choice of the operator, the subject at one of the at least two predefined shooting distances, then realizing one or several shots at this preset distance.
    A variation of this method is for the user to operate a switch for selecting one of the at least two predefined shooting distances before positioning the subject at the selected shooting distance.
    In the case of using two pairs of light pointers, the user will activate one of the two pairs of projectors, and then place the subject so that the two light patterns projected by the projectors converge at a point located on the surface of the subject. The user can optionally move the subject back or forward or backward or forward the stereophotogrammetry device to achieve this superposition, then take one or more shots at this preset distance of suj and.
    In the case of a single pair of luminous projectors having a projector convergence setting, the user will set the desired distance among the at least two predefined distances before placing the subject and the stereophotogrammetry apparatus and then trigger the shot.
    In the case of a single pair of luminous projectors having more than one pattern per headlamp, the user will place the subject relatively to the camera so as to superimpose a common or complementary pattern from of each of the two luminous projectors.
    In the case of use of a range finder, the user will place the subject and the stereophotogrammetry device relatively so that the rangefinder displays one of at least two predefined focus distances. It will be advantageous to provide the telemeter with a distance programming system enabling the activation of a signal when the desired distance is achieved. Thus, the user will initially program the distance of the rangefinder for one of the at least two predefined distances, then place the subject and the stereophotogrammetry device relatively to the activation of the rangefinder signal marking the achievement of the selected distance and finally the user will activate the shooting at the moment when he receives or perceives this signal. In a clever variant of the method, the stereophotogrammetry device is triggered automatically by the signal marking the achievement of the range of the preprogrammed rangefinder from one of at least two predefined shooting distances.
    In a variant of the method and after one or more stereophotogrammetric shots have been taken for one of the at least two predefined shooting distances, the user determines in three dimensions the surface or surfaces of the subject corresponding to this or these shots. The user is then able to match the different surfaces reconstructed in three dimensions, then to patch (it will translate "stitcher" in English) the different surfaces to achieve ultimately a single three-dimensional representation of the subject taken at this distance.
    In a particular variant of the method, the user will be able to choose between: - selecting the position corresponding to an approximate A4 format, then making several shots of the subject's head at this distance, then determining in three dimensions the corresponding surfaces and finally match and patch the different surfaces to obtain a single three-dimensional representation of the subject's head. - Or select the position corresponding to an approximate format A3, then take several shots of the body of the subject at this distance, then determine in three dimensions the corresponding surfaces and finally match and patch the different surfaces to obtain a single representation in three dimensions of the body of the subject.
    In a still more specific variant of the method for which one of the at least two shooting distances corresponds to a shooting field close to an A4 format and the other close to an A3 format, there will be an interest that: - when the user selects the distance corresponding to the A4 format, he then takes three or four shots of the face, the first shot being taken from the front, a second shot being taken of a side of the face and slightly below, a third shot being made on the other side of the face and slightly below and the fourth shot, optional, facing the subject but from below. when the user selects the distance corresponding to the format A3, he then takes five shots of the torso, the first being taken from the front, the second from the side and the third from the other side - these three views being taken perpendicularly to the surface of the subject and at the height of the nipples - the fourth shot being taken from side and below and the fifth from the other side and below, these last two views making it possible to image the inframammary fold for each of the breasts.
    We have found a particular advantage in using these 3 or 4 A4 views for facial reconstruction and 5 A3 views for torso and breast reconstruction, which also particularly covers the other main areas of application targeted in plastic surgery. The advantage of the invention is thus to have a single portable stereophotogrammetry device that is optimized for both the shooting of the face and for the shooting of the torso. It is opposed to existing mobile systems, which have only one nominal positioning distance of the subject. By covering these two anatomical parts for very different surfaces, these same device and method make it possible to reconstruct many other parts of the body ranging from the surface of a hand to that of the complete torso and even beyond.
    The accompanying drawings illustrate the invention: - Figure 1 shows the invention in a side view. - Figure 2 shows the invention in a view from above. FIG. 3 shows a variant of the invention comprising a pair of luminous projectors whose convergence distance is adjustable. FIG. 4 shows a variant of the invention in which a pair of luminous projectors each projecting several patterns is used. FIG. 5 shows a variant of the invention in which a telemeter is used to carry out one or the other of the at least two predefined distances. - Figure 6 shows a variant of the invention for the realization of a double-optic having a very large depth of field. - Figure 7 shows a method according to the invention for taking subjects taken at two different distances predefined. - Figure 8 shows the optimized shooting angles for the face using a shooting field close to A4. - Figure 9 shows the optimized shooting angles for the torso using a shooting field close to an A3 format.
    With reference to these drawings, the device consists of: - The body of a camera (1) - A double optics (2) mounted on the body of the camera (1) and consisting of two sub -optics (2b) and (2c) allowing the realization of a stereoscopic pair corresponding to two slightly different shooting angles. - Distance measuring means (3,4) for defining at least two distinct shooting distances corresponding to the positions (A3) and (A4) in the space extending in front of the camera.
    It will be advantageous for the realization of the device that the positions (A3) and (A4) are contained between the plane (6a) and the plane (6b) which define the depth of field (6), that is to say the distance from the space for which the images of the stereo pair are sharp, (6a) being the plane closest to the stereophotogrammetry device for which the image begins to be sharp and (6b) being the farthest plane of the system of stereophotogrammetry for which the image is still sharp.
    In a particular variant of the invention, the distance measuring means consist of two pairs of light projectors, so that the first pair of light projectors (3b) and (3c) converge at a point (A3) and the second pair of luminous projectors (4b) and (4c) converges towards a second point (A4). It will be advantageous in this case to have a switch (5) allowing, at the discretion of the user, to trigger the ignition: - of the pair of luminous projectors (3b) and (3c), - of the pair of illuminated projectors (4b) and (4c).
    There will be an advantage also that a third position of the switch (5), called "rest position", allows the extinction of all light projectors.
    In another variant of the invention, the device will be provided with a pair of light projectors (3b) and (3c) whose convergence distance is adjustable, so that by changing the convergence settings, the The user can ensure the convergence of the two luminous projectors to one of at least two different predefined distances (A4, A3). One possible way to achieve adjustable projectors with respect to their point of convergence, illustrated in Figure 3, is to provide each projector with a rotation axis, a semicircular protractor and a positioning rod solidarity the light projector and provide for each projector two locking positions on the associated protractor, respectively (7b) and (8b) for the light projector (3b), and (7c) and (8c) for the light projector (3c), so that: - when the positioning rod of the headlamp (3b) is locked in position (7b) and the positioning rod of the headlamp (3c) is locked in position (7c) then the luminous headlamps (3b) and (3c) converge at the point (A3) - and so that when the positioning rod of the projector (3b) is locked in position (8b) and the positioning rod of the projector (3c) is locked in position (8c), then the luminous projectors (3b) and (3c) converge at point (A4).
    In yet another variant of the invention, the device is provided with a pair of luminous projectors (3b) and (3c) whose light patterns are superimposable at two different distances. In the variant according to FIG. 4, each light projector emits a pattern composed of two luminous points, one internal and the other external, so that by superimposing the external light points, the position of the point is materialized ( A3) and so that by superimposing the internal light points, the position of the point (A4) is realized. As indicated in the description, there will be an interest in distinguishing the internal patterns of the external patterns by colors or patterns of different patterns.
    In yet another variant of the invention the device is provided with a telemetry system for defining one of at least two different predefined distances. According to the implementation shown in Figure 5, a rangefinder (9) is placed on the camera body (1). It may be provided with a screen (10) displaying the distance between the rangefinder (9) and the subject (S), as well as a switch (5) so that a first position of the switch (5) allows the triggering a signal (11) when the distance (A4) is achieved and so that a second position of the switch (5) allows the triggering of a signal (11) when the distance (A3) is realized. In still other embodiments using a range finder, it may not have a switch but rather different ways to report the achievement of distance (A4) or distance (A3) by means for example of different colors in the case of a visual signal or different sounds in the case of a sound signal or even any other way to distinguish the realization of one or the other of at least two predefined distances.
    In a variant of the invention particularly useful in plastic surgery or in aesthetic dermatology, it will be advantageous if the closest distance (A4) is such that the intersection of the pyramid of shooting corresponding to one of the sub- optical (2b) or (2c) with the plane perpendicular to the axis of view and passing through the positioning point (A4) corresponds to a surface which is approximately that of a standardized A4 format and that the distance most distant (A3) is such that the intersection of the pyramid of shooting corresponding to one of the sub-optics (2b) or (2c) with the plane perpendicular to the axis of view and passing through the point of positioning (A3) corresponds to a surface which is approximately that of a standard format A3.
    According to a variant of the invention that is particularly advantageous in that it allows the production of an optical system having a very large depth of field (6) and illustrated in an indicative manner in FIG. 6, the stereophotogrammetry device may be based on a light separator so that each of the sub-optics (2b, 2c) is equipped with a set of two opposite mirrors and three aligned lenses such as an external mirror called secondary mirror (12b, 12c) receives the image of the subject (S) to return it to an opposite inner mirror called primary mirror (13b, 13c) which itself returns the image through a first lens of the plano-convex type (14b, 14c), then through a second double-concave type lens (15b, 15c), then through a third achromatic doublet type lens (16b, 16c) so that this image reaches a photosensitive surface (17) placed inside the body of the camera (1 ), the two images collected from the subject (S) by the two sub-optics (2b, 2c) thus constituting the stereo pair acquired by the apparatus.
    The method according to the invention consists in implementing the device according to the invention by selecting one of the at least two predefined distances (100), then placing the subject at the predefined distance of the camera (200). and taking one or more shots at that distance (300). Depending on the implementation of the acquisition device, the placement of the subject (200) will be performed by performing the superposition of patterns emitted by the one or more light pointers, by operating a range finder or by other means of distance measurement.
    According to a variant of the method, the operator iterates between placing the subject with the distance measuring means (200) and the shots (300) at this predefined distance in order to acquire a certain number of views of the subject. The operator can then determine in three dimensions the surfaces (400) for each of the collected views. The operator can then match in space (500) the different 3D surfaces. The operator can then take the various reconstructed and recalibrated 3D surfaces and patch them (or "stitcher") (600) into a single 3D representation of the subject.
    According to a variant of the method using a device having among its various predefined distances the possibility of taking pictures in an approximate A4 format and an approximate A3 format, the user selected beforehand (100) between: - use the distance (A4) corresponding to the A4 format, position the subject at this distance (200) then acquire several views of the subject's face (300) at this distance (A4) and then implement the reconstruction step (400), of the registration (500) and patching (600) surfaces to generate a 3D model of the subject's face (710). using the distance (A3) corresponding to the A3 format, positioning the subject at this distance (200) and then acquiring several views of the subject's torso (300) at this distance (A3) and then implementing the reconstruction step (400) ), resetting (500) and patching (600) surfaces to generate a 3D model of the subject's torso (720).
    In this case, there will be an advantage that for the range of shots at the distance (A4) of the face, the viewing angles are similar to those shown in FIG. 8, that is to say a first view taken from the front (310), a second shot being taken from one side of the face and slightly below (320), a third shot being taken on the other side of the face and slightly below (330) and the fourth optional shot being taken in front of the subject but from below (340).
    There will also be an advantage that for the series of shots at the distance (A3) of the torso, the viewing angles are similar to those shown in FIG. 9, that is to say a first face-off (350), a second on one side (360) and a third on the other side (370) - these three views being taken perpendicular to the surface of the subject and the height of the nipples - the fourth take of seen from side and below (380) and the fifth on the other side and below (390), these last two shots to image the inframammary fold for each breast.
    The device and the method according to the invention are particularly intended to acquire, by means of a single portable stereophotogrammetry device, views at least two predefined distances. It is particularly useful for acquiring representations in the form of optimized three-dimensional surfaces for both the face and the torso of the subject, thus covering the main needs of plastic surgeons and aesthetic dermatologists by means of a single camera fully portable.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1) Device for stereophotogrammetric shooting comprising a camera (1) and a dual optics (2) provided with two suboptics (2b, 2c) to obtain two simultaneous shots according to each a different angle and characterized in that it comprises a distance measuring system (3,4) configured to adopt as target distance one of at least two distinct predetermined distances (A4, A3) for shooting.
    [0002]
    2) Device according to claim 1, characterized in that the at least two distinct predefined distances (A4, A3) are included in a region of the space corresponding to the depth of field (6) of said device.
    [0003]
    3) Device according to one of claims 1 to 2, characterized in that the measuring system has at least two pairs of light projectors (3b, 3c) and (4b, 4c), a first pair of light projectors (3b, 3c) being adjusted so as to converge at a predetermined first distance (A3) of at least two distinct predetermined distances (A4, A3) and a second pair of light projectors (4b, 4c) being set so as to converge to a second predefined distance (A4) of the at least two distinct predefined distances (A4, A3).
    [0004]
    4) Device according to one of claims 1 to 2 and characterized in that it has a pair of luminous projectors (3b, 3c) whose convergence distance can be adjusted to one or the other at least two distinct predefined distances (A4, A3).
    [0005]
    5) Apparatus according to one of claims 1 to 2, characterized in that it has a pair of luminous projectors (3b, 3c) having patterns defined so that two projected patterns are superimposed at a predefined distance ( A4) and two other projected patterns are superimposed on another predefined distance (A3).
    [0006]
    6) Device according to one of claims 1 to 5, characterized in that it has a rangefinder (10) for adjusting the target distance to one or the other of the at least two predefined distances separate (A4, A3).
    [0007]
    7) Device according to claim 6, characterized in that the rangefinder (10) is configured to output a visual signal and / or sound (11) indicating that the target distance is reached.
    [0008]
    8) Device according to one of claims 1 to 7 and characterized in that it comprises a switch (5) for selecting any one of at least two predefined shooting distances (A4, A3).
    [0009]
    9) Apparatus according to any one of claims 1 to 8 and characterized in that the smallest (A4) of at least two distinct predefined shooting distances corresponds to a first field of view of a surface more at least 25% smaller relative to the area of the field of view corresponding to a second (A3) of at least two distinct predefined shooting distances.
    [0010]
    10) Device according to any one of claims 1 to 9 and characterized in that one of the at least two predefined shooting distances corresponds to a field of view of a surface of a standardized format A4 to more or less 40% and / or another of the at least two predefined shooting distances corresponds to a field of view of a surface of a standardized format A3 within plus or minus 40%.
    [0011]
    11) Device according to any one of claims 1 to 10 and characterized in that each sub-optic (2b, 2c) of the dual optics (2) comprises three lenses, including in the order corresponding to the direction of the path light rays entering the optics: a plano-convex lens (14b, 14c), a double-concave lens (15b, 15c), and a lens forming an achromatic doublet (16b, 16c).
    [0012]
    12) A method using a device according to any one of claims 1 to 11, wherein the operator selects as a target distance one of at least two predefined shooting distances (100), places a subject at the predefined distance. selected (200), then performs one or more shots at the selected preset distance (300) and in which the user takes multiple shots of stereoscopic pairs at one of the at least two predefined shooting distances d the same subject, determines in three dimensions the surfaces corresponding to the different shots of this subject (400), then maps the different reconstructed surfaces (500) and finally pieced the different surfaces matched (600) into a single three-dimensional representation of the subject.
    [0013]
    13) A method according to claim 12, characterized in that the user actuates a switch (5) to select one of at least two predefined shooting distances (100) before proceeding with the placement of the subject (200). ) relative to the device.
    [0014]
    14) A method according to any one of claims 12 or 13, characterized in that the user chooses (100) between: - select as the target distance the distance (A4) closest to a subject among the at least two separate distances (A4, A3), then place the camera and subject (200) relatively to this target distance, and then take several shots at this distance from the subject's face from different angles (300) , then determine in three dimensions the surfaces corresponding to these different shots (400), then map (500) these different surfaces, then patch (600) these different surfaces to form a single three-dimensional surface representing the face of the subject (710). - or select as distance target a distance (A3) farther away from the subject among the at least two distinct predefined distances (A4, A3), then relatively place the camera and the subject at this target distance (200) , then take several shots at this distance from the torso of the subject at different angles (300), then determine in three dimensions the surfaces corresponding to these different shots (400), then map (500) these different surfaces , then patch (600) these different surfaces to form a single three-dimensional surface representing the torso of the subject (720).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3156843B1|2018-04-18|Device and method for three-dimensional reconstruction of the head and body
    US9961335B2|2018-05-01|Pickup of objects in three-dimensional display
    JP6972105B2|2021-11-24|Fixed Distance Virtual Reality Systems and Augmented Reality Systems and Methods
    JP5758805B2|2015-08-05|Dynamic camera focusing
    EP2760329A1|2014-08-06|Method for determining ocular and optical measurements
    US9832453B2|2017-11-28|Devices and methods for generating a 3D imaging dataset of an object
    EP2901209B1|2019-08-14|Method for helping determine the vision parameters of a subject
    CN110915210B|2021-10-15|Augmented reality display with active alignment and corresponding method
    CN103932677A|2014-07-23|Image projector
    WO2015007784A1|2015-01-22|Method for determining ocular measurements using a consumer sensor
    EP2952851B1|2018-03-07|Device for reconstructing a stereophotogrammetry image pair
    FR2882512A1|2006-09-01|Measuring device for geometrical characteristic of an anatomical segment comprises a data processing measurement system having an identification system, pairing system and a calculating unit
    EP3210378B1|2020-11-04|Method for collecting image data for producing immersive video and method for viewing a space on the basis of the image data
    CN110288642A|2019-09-27|Three-dimension object fast reconstructing method based on camera array
    JP2008128771A|2008-06-05|Apparatus and method for simultaneously acquiring spectroscopic information and shape information
    WO2011033187A1|2011-03-24|Three-dimensional digitisation method comprising double-matching
    WO2011033186A1|2011-03-24|Method for the three-dimensional digitisation of a surface, comprising the projection of a combined pattern
    Tortschanoff et al.2014|Compact low-cost scanner for 3D-reconstruction of body parts with structured light illumination
    US20210235062A1|2021-07-29|Three-dimensional image reconstruction using multi-layer data acquisition
    Kwan et al.2017|Development of a Light Field Laparoscope for Depth Reconstruction
    FR3057987A1|2018-04-27|SYSTEM AND METHOD FOR TRAINING IN THE HANDLING OF AN ECHOGRAPHIC PROBE
    FR2945620A1|2010-11-19|Portable device for digitizing surface of head for manufacturing helmet of e.g. doughboy, has cameras capturing colorimetric images of head, where position of eyes in three-dimensional section is determined by triangulation from images
    FR3052287A1|2017-12-08|CONSTRUCTION OF A THREE-DIMENSIONAL IMAGE
    FR2950139A1|2011-03-18|Method for constructing three-dimensional model to scan e.g. casing of statue, involves projecting structured luminous pattern on surface, acquiring stereoscopic images of surface, and constructing scanning model from images
    WO2002063568A1|2002-08-15|Method and system for generating virtual and co-ordinated movements by sequencing viewpoints
    同族专利:
    公开号 | 公开日
    US10681334B2|2020-06-09|
    US10165253B2|2018-12-25|
    FR3042610B1|2018-09-07|
    US10070119B2|2018-09-04|
    US20170111632A1|2017-04-20|
    US20180324405A1|2018-11-08|
    EP3156843A1|2017-04-19|
    EP3156843B1|2018-04-18|
    US20190394449A1|2019-12-26|
    ES2678750T3|2018-08-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5355253A|1991-11-30|1994-10-11|Nidek Co., Ltd.|Stereoscopic retinal camera|
    FR2763709A1|1997-05-14|1998-11-27|Minoru Inaba|Stereoscopic camera with prismatic view finder|
    FR2910648A1|2006-12-26|2008-06-27|Naska Films Soc Responsabilite|Object's e.g. building, geometrical data capturing method for e.g. online sale application, involves capturing images representing object, from two different view points, and measuring distance between one of view points and point of object|
    US20110228043A1|2010-03-18|2011-09-22|Tomonori Masuda|Imaging apparatus and control method therefor, and 3d information obtaining system|
    US4126876A|1975-11-03|1978-11-21|Jones H|Snapshot type three dimensional camera|
    JPH0748878B2|1986-03-19|1995-05-24|日本放送協会|Stereoscopic image pickup display system|
    JP4115801B2|2002-10-10|2008-07-09|オリンパス株式会社|3D imaging device|
    JP2005274925A|2004-03-24|2005-10-06|Pioneer Electronic Corp|Focusing method and focusing device|
    US20060227336A1|2005-04-06|2006-10-12|Dinner Todd M|Apparatus and methods for preparing customized personal supports|
    US20120035469A1|2006-09-27|2012-02-09|Whelan Thomas J|Systems and methods for the measurement of surfaces|
    US20100091104A1|2006-09-27|2010-04-15|Georgia Tech Research Corporation|Systems and methods for the measurement of surfaces|
    US8897482B2|2008-02-29|2014-11-25|Trimble Ab|Stereo photogrammetry from a single station using a surveying instrument with an eccentric camera|
    DE102008035150A1|2008-07-28|2010-02-04|Hella Kgaa Hueck & Co.|Stereo Camera System|
    US20100188429A1|2009-01-29|2010-07-29|At&T Intellectual Property I, L.P.|System and Method to Navigate and Present Image Libraries and Images|
    CA2797302C|2010-04-28|2019-01-15|Ryerson University|System and methods for intraoperative guidance feedback|
    JP2011237646A|2010-05-11|2011-11-24|Panasonic Corp|Three-dimensional imaging apparatus|
    US10628666B2|2010-06-08|2020-04-21|Styku, LLC|Cloud server body scan data system|
    WO2012075155A2|2010-12-02|2012-06-07|Ultradent Products, Inc.|System and method of viewing and tracking stereoscopic video images|
    WO2014063999A1|2012-10-17|2014-05-01|Cathx Research Ltd|Improvements in and relating to processing survey data of an underwater scene|
    US9983384B2|2014-04-20|2018-05-29|Lenny Lipton|Stereoscopic lens for digital cameras|
    FR3022022B1|2014-06-04|2019-08-09|Quantificare|DEVICE FOR ACQUIRING A PAIR OF IMAGES IN STEREOPHOTOGRAMMETRY|
    FR3042610B1|2015-10-14|2018-09-07|Quantificare|DEVICE AND METHOD FOR RECONSTRUCTING THE HEAD AND BODY INTO THREE DIMENSIONS|FR3042610B1|2015-10-14|2018-09-07|Quantificare|DEVICE AND METHOD FOR RECONSTRUCTING THE HEAD AND BODY INTO THREE DIMENSIONS|
    US10176275B1|2016-03-28|2019-01-08|Luvlyu, Inc.|Breast shape visualization and modeling tool|
    JP2020501155A|2016-12-07|2020-01-16|マジック アイ インコーポレイテッド|Distance sensor including image sensor with adjustable focus|
    WO2019070867A2|2017-10-08|2019-04-11|Magik Eye Inc.|Distance measurement using a longitudinal grid pattern|
    KR20200123483A|2018-03-20|2020-10-29|매직 아이 인코포레이티드|3D depth detection and adjustment of camera exposure for 2D imaging|
    WO2019182881A1|2018-03-20|2019-09-26|Magik Eye Inc.|Distance measurement using projection patterns of varying densities|
    CN114073075A|2019-05-12|2022-02-18|魔眼公司|Mapping three-dimensional depth map data onto two-dimensional images|
    法律状态:
    2017-01-11| PLFP| Fee payment|Year of fee payment: 2 |
    2017-04-21| PLSC| Publication of the preliminary search report|Effective date: 20170421 |
    2017-09-19| PLFP| Fee payment|Year of fee payment: 3 |
    2018-08-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-12| PLFP| Fee payment|Year of fee payment: 5 |
    2020-09-29| PLFP| Fee payment|Year of fee payment: 6 |
    2021-09-13| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1502170|2015-10-14|
    FR1502170A|FR3042610B1|2015-10-14|2015-10-14|DEVICE AND METHOD FOR RECONSTRUCTING THE HEAD AND BODY INTO THREE DIMENSIONS|FR1502170A| FR3042610B1|2015-10-14|2015-10-14|DEVICE AND METHOD FOR RECONSTRUCTING THE HEAD AND BODY INTO THREE DIMENSIONS|
    EP16020393.1A| EP3156843B1|2015-10-14|2016-10-11|Device and method for three-dimensional reconstruction of the head and body|
    US15/289,981| US10070119B2|2015-10-14|2016-10-11|Device and method to reconstruct face and body in 3D|
    ES16020393.1T| ES2678750T3|2015-10-14|2016-10-11|Device and procedure to reconstruct the head and body in three dimensions|
    US16/035,935| US10165253B2|2015-10-14|2018-07-16|Device and method to reconstruct face and body in 3D|
    US16/190,401| US10681334B2|2015-10-14|2018-11-14|Device and method to reconstruct face and body in 3D|
    [返回顶部]