FR3047091A1 - ELECTRICAL DEVICE FOR SHOOTING VIDEO AND SYSTEM THEREFOR - Google Patents

Abstract

The invention relates to an electronic device (1) for video shooting comprising a fixed base, a rail at least partially circular and secured to the base, a platform, a camera support unit attached to the platform, an electric motor rotating the platform along the rail, a battery for powering said motor, a charger secured to the base and compatible with said battery, a control unit for controlling the angle of rotation of the platform, the unit control device detecting that the battery charging position has been reached by measuring a voltage on charge contacts of the battery. The invention also relates to a video recording system comprising said device (1) and a video recording apparatus (2) placed in the support.

Description

FIELD OF THE INVENTION The invention relates to the field of shooting in the context of medicine and cosmetic surgery, orthodontics, beauty or fitness services and more generally areas requiring accurate comparison of before / after shots. It relates more particularly to an electronic device for shooting video and a corresponding video shooting system. 2. Prior Art

In the field of aesthetic medicine and surgery, practitioners typically take pictures of the face, or part of a patient's body, before and after an operation.

Standards for pre- / post-intervention imaging conditions have been put in place to ensure relevant observations, as noted in "Photography Standards in Plastic Surgery", 2006, Plastic Surgery Education Foundation, USA.

Before / after shots should be taken using the same equipment and procedures. The camera, lighting, magnification, frame, patient position and preparation must be constant.

The material used is most often similar to that of a professional photographer in his photographer's studio, as shown in the chapter "Photography in Facial Plastic Surgery" in the treatise "Advanced Therapy in Facial Plastic & Reconstructive Surgery", J. Regan Thomas, p. 31, 2010, PMPH, USA. This equipment includes a patient chair placed in front of a uniform background, a camera on a tripod-type stand, lights and reflectors.

Most practitioners perform static shots from a variety of standardized angles. However, the clichés thus obtained are often not very comparable between them. In addition, panoramic or even stereoscopic views, or videos before / after, would greatly improve the patient's perception of the benefit of his intervention. It is extremely difficult to manually perform pre / post video sequences so that the before / after video sequences can be superimposed for their frame-by-frame comparison. It therefore appears the need for practitioners to equip themselves with automated video recording systems.

In the prior art there are known automated systems for making such views, for example, the stereoscopic remote viewing system described in European Patent Application EP0218751. In this system, a video camera mounted on a carriage, which moves along a semicircular rail, provides video footage of an object placed in the center of the rail. However, this system for the industry is complex and expensive and is not suitable for use in the field of aesthetic medicine and surgery. 3. Objectives of the invention

The present invention provides a solution to overcome the aforementioned drawbacks. One objective of the invention is to make it possible to simplify video recording systems intended for aesthetic medicine and surgery, in particular by reducing the number of components, which makes it possible to reduce the production costs of such systems. and increase their robustness. For example, the solution proposed by the invention saves in particular a position sensor. 4. SUMMARY OF THE INVENTION The subject of the invention is an electronic device for video shooting comprising a fixed base, a rail at least partially circular and integral with the base, a platform in sliding connection with the rail, a support for camera for shooting the platform, an electric motor arranged to rotate the platform along the rail, a rechargeable battery integral with the motor, said battery being intended to power said motor, a charger compatible with said battery, the charger being secured to the base and arranged to recharge said battery at a position of said battery corresponding to a predetermined rotation angle of the platform, a control unit for controlling the angle of rotation of the platform, the device being characterized in that the control unit detects that the charging position of the battery is reached by measuring a voltage on contacts of battery charge.

The detection of the charging of the battery by the charger by means of a voltage measurement has the advantage of making it possible to know precisely the position of the battery and therefore of the platform near the charging position and to initialize the position of the battery. platform at each cycle so as to keep an accurate estimate of the measurement of this position, by limiting the risk of drift, without the need to resort to additional sensors. The detection of battery charging by the charger further enables the control unit to control the shutdown of the engine when the charging of the battery by the charger is detected and a video sequence is not in progress. capture, in order to position the platform in a reference position and allow time for the battery to recharge at least partially.

According to a particular embodiment, the motor is a stepper motor. The stepper motor has the advantage of controlling the position of the platform that it drives accurately thanks to its degree of precision.

According to a particular embodiment, the control unit comprises a counter incremented at each step of the motor in one direction and decremented at each pitch of the motor in the opposite direction. The counter makes it possible to calculate the position of the platform at any moment by a relationship of proportionality between the number of engine pitches and the rotation of the platform. The knowledge of the position of the platform at any time allows a precise enslavement of this position.

According to a particular embodiment, the control unit comprises at least one man-machine interface allowing the control unit to communicate to a user at least one piece of information and / or allowing a user to communicate to the unit of controls at least one piece of information, for example to parameterize the following quantities: the speed of the motor, its direction of rotation, its start-up, its stop, the position of the platform, the desired angular amplitude of video shooting, the number stops during a video acquisition, the position and duration of the stops.

According to a particular embodiment, the human-machine interface is a remote control. The remote control allows the practitioner to position himself at the location he wants while being able to control the device. The remote control allows in particular to control the device when the camera does not interact with the device. Thus, during a calibration phase preceding a video capture, the practitioner uses the various commands of the remote control to position the device in front view and profile, right or left, to make adjustments and position the patient. The remote control also makes it possible to launch a rotation of the platform for a video capture.

According to a particular embodiment, the control unit comprises a remote communication module, such as a Bluetooth module, an infrared module, a WiFi module or a 3G module, in order to enable said device to communicate with at least a remote device. The remote communication module is used to interface the device with a large number of current connected devices, thus diversifying its possible uses and making it scalable to the extent that it can be programmed in a personalized way.

According to a particular embodiment, the remote device is a video recording device placed in the support. This configuration has the dual advantage of controlling the device by means of the remote apparatus and controlling the video shooting by means of information provided by the device such as the position of the platform or the initialization of a rotation of the camera. the platform.

According to a particular embodiment, the device comprises means for generating a sound signal at the time of passage of the platform in at least one predetermined position along the rail. The generation of a sound signal to signal the passage of a predetermined position makes it possible to obtain sound information which, coupled with the video sequence, makes it possible to precisely synchronize two video sequences before / after. This information is useful in particular when the camera does not communicate with the device for example via the communication module.

According to a particular embodiment, the motor comprises a shaft equipped with a cylindrical end rolling without sliding with the support. When the engine is in operation, the cylindrical end rolls without sliding on the periphery of the support so as to move along this periphery and to drive the platform in this movement.

According to a particular embodiment, the base further comprises a rack. The rack allows, thanks to a pinion placed at one end of the motor shaft, to transform a rotational movement of the motor moving along the rack. The rack being substantially parallel to the rail, the platform is thus rotated along the rail.

According to a particular embodiment, the device further comprises a substantially uniform hemicylindrical color screen diametrically opposed to the support and secured to the platform. The screen ensures a uniform background throughout the various video sequences before / after.

According to a particular embodiment, the support comprises at least one pivot connection or a slide connection with the platform to allow adjustment of the position or orientation of the support relative to the platform. The adjustment of the position and inclination of the support makes it possible to adapt the device to the size of the patient and to the part of the body concerned by the intervention. The position is changed either manually or via a mechanical actuator type cylinder or motor. The invention also relates to a video recording system comprising said device and a video recording device placed in the support.

According to one embodiment, the camera is a mobile phone. This configuration has the advantage of not requiring a dedicated camera for the device but a mobile phone that can be used for other purposes. As advances in the field of mobile phone cameras, the mobile phone serving as a camera is advantageously changed while remaining compatible with the device that is kept.

According to a particular embodiment, the system further comprises a processing unit for synchronizing video sequences. The processing unit can synchronize the videos before / after automatically.

According to a particular embodiment, the processing unit is configured to synchronize said video sequences by means of said sound signal. This synchronization is useful for cameras that do not communicate with the device.

According to a particular embodiment, the control unit of the device comprising a remote communication module, the processing unit is configured to synchronize said video sequences by means of the information exchanged with the communication module. This synchronization is useful for cameras that communicate with the device. It is precise, simple and without noise nuisance.

According to a particular embodiment, the camera has a visual reference aid for aiming such a pattern. The visual cue is used to adjust the position and orientation of the support and to position the patient correctly. 5. List of Figures Other features and innovative advantages will become apparent from the following description, provided for information only and by no means limitative, with reference to the accompanying drawings, in which:

FIG. 1 represents a schematic and perspective view of a video recording system according to one embodiment of the invention;

FIG. 2 represents a schematic and perspective view of an electrical device for video shooting corresponding to the video shooting system of FIG. 1;

Figure 3 shows a partial perspective and exploded view of the device of Figure 2;

Figure 4 shows a partial bottom view of the device of Figures 2 and 3;

FIG. 5 represents a partial perspective view of a device comprising a battery and a charger according to one embodiment of the invention; and

Figure 6 shows a block diagram of a video shooting system according to the invention. 6. Detailed description

Referring to Figure 1 is shown a video shooting system according to the invention. The system comprises an electrical device 1 for shooting video and a camera 2 for shooting video. In the context of the use that is envisaged, a patient P is seated on a stool T so as to be in the field of view of the camera 2 of video shooting.

FIGS. 2 to 4 show an electrical device 1 for video shooting according to the embodiment of FIG. 1. The device 1 comprises a base 10 extending in a horizontal plane, the horizontal being defined as being perpendicular to the vertical defined by gravity. The device 1 also comprises a circular rail 100, integral with the base 10 and in the horizontal plane, a platform 11 in the horizontal plane and in sliding connection with the rail 100 and a support 17 of the camera for shooting solidarity with the platform 11. In the embodiment shown, the base 10 also comprises a rack 101 in a horizontal plane with which it is in fixed connection, the rack being substantially of the same shape and size as the rail 100 and disposed at the vertical rail 100.

The device 1 further comprises an electric motor 12 integral with the platform 11. The motor 12 rotates a shaft 121 terminated by an end equipped with a pinion 120. The pinion 120 is engaged in the rack so as to move the along the rack when the motor 12 is in operation. Thus, the pinion 120, integral with the motor 12 via the shaft 121, drives the motor 12 in a horizontal movement substantially parallel to hers.

Insofar as the motor 12 is secured to the platform 11, during its operation, the motor 12 rotates the platform 11 along the rail 100.

According to an embodiment not shown, the device 1 does not include a rack. In this case, one end of the motor shaft is equipped with a cylinder covered with a non-slip material such as a rubber allowing the cylinder to roll without sliding on the periphery of the support so as to move along this periphery and to train the platform in this displacement.

With reference to FIGS. 3 to 6, the device 1 also comprises a battery 13 rechargeable by induction and integral with the motor 12, the battery 13 being intended to supply the motor 12. The battery is recharged by a charger 14. The recharging is done by contact, for example by metal contact, or without contact, for example by induction. The charger 14 is equipped with a USB socket 140 to allow its power supply by standard and widespread cables.

FIG. 5 represents a partial view of a device 1 according to an embodiment in which the device 1 comprises a charger 14 compatible with the battery 13, the charger 14 being secured to the base 10 and arranged to recharge the battery 13 at a position of the battery 13 corresponding to a predetermined angle of rotation of the platform 11. For example, assuming the platform has a maximum stroke corresponding to a rotation of 180 °, the charger is positioned halfway, so that 'From the charging position of the battery, the platform rotates + 90 ° or -90 °. The charging position of the battery is then the reference position, it corresponds to the default position off and the position for a front view of the patient. The position obtained after a clockwise rotation of 90 ° from the reference position corresponds to a position for a right profile shot and the position obtained following a 90 ° counter clockwise rotation. the reference position corresponds to a position for shooting the left profile.

According to a preferred embodiment, the device 1 is equipped with a control unit 15 (shown in FIG. 6), able to measure the voltage on charge contacts of the battery. Thus, this voltage measurement makes it possible to initialize the angular position of the platform precisely while economizing on a position sensor. The voltage measurement also makes it possible to control the stopping of the motor to allow the battery 13 to remain in the charging position until it is at least partially recharged.

In order to guarantee identical before / after video shooting conditions, in particular, conditions making it possible to obtain video sequences of the same duration and presenting a patient position identical to each pair of images before / after corresponding sequences, the device 1 is placed in the reference position before each video shooting. Once the angular position of the platform initialized to the reference position, the repetition of the same protocol provides the same before / after video shooting conditions. Indeed, the characteristics of the motor are known, for example if it is a stepper motor, the diameter of the pinion is known and the number of steps for a complete rotation of the motor is known. In addition, the dimensions of the device are known, in particular those of the rack. It is therefore easy to establish a correspondence between the number of steps made by the motor and the angular position of the platform. A counter is incremented at each engine step in one direction and decremented at each engine step in the opposite direction. Thus, without using a position sensor, it is possible to perform a video shooting of a patient of 180 ° repeatedly. It suffices to position platform 11 at 90 ° in the clockwise direction relative to the reference position by feeding the motor so that it rotates in a direction corresponding to a displacement of the platform in a clockwise direction, until the counter reaches a value corresponding to a rotation of + 90 °. Then, to take the video shooting, simply power the motor to turn in a reverse direction corresponding to a displacement of the platform in the counterclockwise direction, until the counter reaches a value corresponding to a rotation of -90 ° so that the platform rotates 180 ° counterclockwise. To place the platform 11 back into the reference position, simply reverse the direction of rotation of the motor to allow the platform to rotate clockwise until the reference position is detected by the control unit by means of the voltage on the battery charge contacts. The control unit then stops the motor and resets the counter and thus the position value of the platform. The control unit 15 is interfaced with a human-machine interface, such as control buttons on the device 1, a non-touch screen or a touch screen on the device, a remote control or a remote connected device to enable the control unit communicates to a user at least one piece of information and / or allows a user to communicate to the control unit at least one item of information. In particular and without limitation, the man-machine interface makes it possible to parameterize the following quantities: the speed of the motor, its direction of rotation, its start-up, its stop, the position of the platform, the angular amplitude of desired video view, the number of stops during a video capture, the position and duration of the stops. The man-machine interface can optionally display the parameters mentioned above and display the actual value of the corresponding quantities.

Referring to Figure 6 is shown a block diagram of a video shooting system according to the invention. As described above, the control unit 15 measures the voltage on charge contacts of the battery to initialize the angular position information of the platform. The control unit 15 also controls the motor 12. The control unit comprises a computing unit 150, for example a microprocessor, capable of implementing a software program.

According to a preferred embodiment, the control unit 15 also comprises a remote communication module 151, for example a Bluetooth module, an infrared module, a WiFi module or a 3G module, able to exchange information with a device remote, for example a mobile phone 2 of the "smartphone" type according to the Anglo-Saxon term, a connected tablet, a connected computer, a connected camera or a remote control 16. The remote device advantageously constitutes the human-machine interface for the device 1 to allow the user to communicate with the device as described above. In addition, in the case where the connected device is also used for video shooting, the communication module 151 can send information for the synchronization of video before / after. For example, in the case where the control unit calculates at any time the position of the platform from the reference position via the engine pitch counter, the control unit sends position information to the camera for positions set in advance so that the camera integrates this position information with the video clip that is being captured. A processing unit, integrated in the remote or separate apparatus, synchronizes two before / after video sequences by means of the position information embedded in said sequences.

According to a particular embodiment, the control unit 15 comprises means 152 for generating a sound signal, at the time of a passage of the platform in at least one predetermined position which remains the same between a video sequence before and a video sequence after. The sound signal is recorded in the video clip being captured. A processing unit, integrated in the camera or separate, synchronizes two video sequences before / after by means of the sound signals present in the sequences.

Referring more particularly to Figures 1 and 2, the camera support 17 comprises means for adjusting the position or orientation of the support relative to the platform. In a preferred embodiment shown in Figure 2, the support 17 comprises a vertical amount forming a slide 171 in which slides an arm 172 actuated by a jack. The slide 171 comprises a button 173 for controlling the jack. The arm 172 has a groove 174 in which slides a spring lug 175 for fixing the camera taking it in a vice in a rest position of the spring and allowing a finer adjustment in vertical translation. According to an embodiment not shown, the support 17 comprises a pivot connection of horizontal axis for adjusting the orientation of the support relative to the platform.

In order to guide the user in the adjustment of the position and orientation of the support and in the positioning of the patient, the video recording apparatus is equipped with a visual cue, for example a sight in the viewfinder. the device or a laser range finder separate from the device, that the user can match with a marker linked to the patient, for example the nose. In addition, this visual cue is also an aid to the positioning of the stool T.

In order to guarantee a constant background throughout the video sequences, the device 1 comprises a screen 18 of substantially uniform semicylindrical color diametrically opposite the support 17 and secured to the platform 11 via two uprights 181 and 182 vertical . The invention is described in the foregoing by way of example. It is understood that one skilled in the art is able to achieve different embodiments of the invention, for example by combining the various characteristics above taken alone or in combination, without departing from the scope of the invention. .

Claims (10)

1. Device (1) for video shooting comprising a base (10) fixed, a rail (100) at least partially circular and secured to the base (10), a platform (11) in sliding connection with the rail (100). ), a camera support (17) integral with the platform (11), an electric motor (12) arranged to rotate the platform (11) along the rail (100), a battery (13), ) rechargeable and secured to the motor (12), said battery (13) being intended to supply said motor (12), a charger (14) compatible with said battery (13), the charger (14) being secured to the base (10) and arranged to recharge said battery (13) at a position of said battery (13) corresponding to a predetermined rotation angle of the platform (11), a control unit (15) for controlling the angle of rotation of the platform (11), the device (1) being characterized in that the control unit (15) detects the achievement of the a charging position of the battery (13) by measuring a voltage on charge contacts of the battery (13). 2. Device (1) according to claim 1 characterized in that the motor (12) is a stepper motor. 3. Device (1) according to claim 2 characterized in that the control unit (15) comprises a counter incremented each step of the motor in one direction and decremented each step of the motor in the opposite direction. 4. Device (1) according to any one of the preceding claims, characterized in that the control unit (15) comprises at least one man-machine interface allowing the control unit to communicate to a user at least one piece of information. and / or allowing a user to communicate to the control unit at least one piece of information. 5. Device (1) according to any one of the preceding claims characterized in that the control unit (15) comprises a module (151) for remote communication, such as a Bluetooth module, an infrared module, a WiFi module or 3G module, to enable said device (1) to communicate with at least one remote device. 6. Device (1) according to claim 5 characterized in that the remote device is a video recording device (2) placed in the support (17). 7. A video shooting system comprising a device (1) according to any one of claims 1 to 6 and a video recording apparatus (2) placed in the support (17). 8. System according to claim 7 characterized in that the camera (2) is a mobile phone. 9. System according to claim 7 or 8 characterized in that it further comprises a processing unit for synchronizing video sequences. 10. System according to claim 9, wherein the control unit (15) of the device (1) comprises a module (151) for remote communication, characterized in that the processing unit is configured to synchronize said video sequences. using the information exchanged with the communication module (151).