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1118 results about "Virtual control" patented technology

Systems and methods for collaborative interactive visualization of 3D data sets over a network ("DextroNet")

Exemplary systems and methods are provided by which multiple persons in remote physical locations can collaboratively interactively visualize a 3D data set substantially simultaneously. In exemplary embodiments of the present invention, there can be, for example, a main workstation and one or more remote workstations connected via a data network. A given main workstation can be, for example, an augmented reality surgical navigation system, or a 3D visualization system, and each workstation can have the same 3D data set loaded. Additionally, a given workstation can combine real-time imagining with previously obtained 3D data, such as, for example, real-time or pre-recorded video, or information such as that provided by a managed 3D ultrasound visualization system. A user at a remote workstation can perform a given diagnostic or therapeutic procedure, such as, for example, surgical navigation or fluoroscopy, or can receive instruction from another user at a main workstation where the commonly stored 3D data set is used to illustrate the lecture. A user at a main workstation can, for example, see the virtual tools used by each remote user as well as their motions, and each remote user can, for example, see the virtual tool of the main user and its respective effects on the data set at the remote workstation. For example, the remote workstation can display the main workstation's virtual tool operating on the 3D data set at the remote workstation via a virtual control panel of said local machine in the same manner as if said virtual tool was a probe associated with that remote workstation. In exemplary embodiments of the present invention each user's virtual tools can be represented by their IP address, a distinct color, and / or other differentiating designation. In exemplary embodiments of the present invention the data network can be either low or high bandwidth. In low bandwidth embodiments a 3D data set can be pre-loaded onto each user's workstation and only the motions of a main user's virtual tool and manipulations of the data set sent over the network. In high bandwidth embodiments, for example, real-time images, such as, for example, video, ultrasound or fluoroscopic images, can be also sent over the network as well.
Owner:BRACCO IMAGINIG SPA

Wrist gesture control system and method

The invention relates to a wrist gesture control system and a wrist gesture control method, particularly relates to a wrist watch type gesture identifying system for controlling electronic products such as mobile phones and computers, and the system can further be used for the remote control and the virtual control of various electromechanical devices such as household appliances, vehicles, industrial machines, game and entertainment devices, teaching and scientific research devices, medical apparatus and instruments, and voice control devices. Each set of the system comprises a left hand system and a right hand system or a system only used by one hand, the wrist gesture control system comprises a wrist watch part 1 which cooperatively works with an upper computer part 2 to control an upper computer as well as a selectively-worn ring part 3, wherein the wrist watch part 1 comprises a control main module 4, a gesture photographing part 5, a backlight LED (Light Emitting Diode) lamp module 6, a power supply module 7 and a waistband feedback module 8; and the upper computer part 2 comprises the upper computer 9 and a first wireless communication module 10; the ring part 3 comprises a ring feedback module 11; the control main module 4 further comprises a control board clamp 12, a second wireless communication module 13, a three-shaft acceleration module 14, a dip angle module 15 and a control button 16.
Owner:寇传阳

Calibration method of correlation between single line laser radar and CCD (Charge Coupled Device) camera

The invention discloses a calibration method of correlation between a single line laser radar and a CCD (Charge Coupled Device) camera, which is based on the condition that the CCD camera can carry out weak imaging on an infrared light source used by the single line laser radar. The calibration method comprises the steps of: firstly, extracting a virtual control point in a scanning plane under the assistance of a cubic calibration key; and then filtering visible light by using an infrared filter to image infrared light only, carrying out enhancement, binarization treatment and Hough transformation on an infrared image with scanning line information, and extracting two laser scanning lines, wherein the intersection point of the two scanning lines is the image coordinate of the virtual control point in the image. After acquiring multiple groups of corresponding points through the steps, a correlation parameter between the laser radar and the camera can be solved by adopting an optimization method for minimizing a reprojection error. Because the invention acquires the information of the corresponding points directly, the calibration process becomes simpler and the precision is greatly improved with a calibrated angle error smaller than 0.3 degree and a position error smaller than 0.5cm.
Owner:NAT UNIV OF DEFENSE TECH

Non-cooperative spacecraft attitude estimation method based on virtual sliding mode control

The invention discloses a non-cooperative spacecraft attitude estimation method based on virtual sliding mode control, and belongs to the technical field of non-cooperative spacecraft navigation. The non-cooperative spacecraft attitude estimation method comprises the following steps: utilizing a virtual control sliding mode controller based on the Lyapunov principle; using target satellite absolute attitude obtained by a stereoscopic vision system as a control objective; according to motion characteristics of the target satellite, establishing a virtual satellite motion model of the target satellite; using a kinetic model of the virtual satellite as a controlled member to obtain attitude parameters of the virtual satellite; using attitude parameters estimated by the virtual satellite and the target satellite absolute attitude obtained by the stereoscopic vision system as controlled input, and calculating the virtual revolving moment on the motion model of the virtual satellite through the virtual sliding mode controller, so as to realize the estimation of the target satellite attitude parameters by the virtual control sliding mode controller. The non-cooperative spacecraft attitude estimation method disclosed by the invention is low in calculated amount, and can still achieve higher convergence rate and higher precision when the initial error of the state variables is high or the system error emerges, so as to meet the requirements of the high performance navigation system.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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