52 results about "Three dimensional method" patented technology

A system used with a virtual device inputs or transfers information to a companion device, and includes two optical systems OS1, OS2. In a structured-light embodiment, OS1 emits a fan beam plane of optical energy parallel to and above the virtual device. When a user-object penetrates the beam plane of interest, OS2 registers the event. Triangulation methods can locate the virtual contact, and transfer user-intended information to the companion system. In a non-structured active light embodiment, OS1 is preferably a digital camera whose field of view defines the plane of interest, which is illuminated by an active source of optical energy. Preferably the active source, OS1, and OS2 operate synchronously to reduce effects of ambient light. A non-structured passive light embodiment is similar except the source of optical energy is ambient light. A subtraction technique preferably enhances the signal/noise ratio. The companion device may in fact house the present invention.

The invention discloses a three-dimensional reconstruction method of a moving target under a variable illumination condition. The three-dimensional reconstruction method comprises the following steps of: collecting images of the moving target in multiple visual angles under the variable illumination condition provided by a light source; establishing an initial three-dimensional model of the moving target according to the images of the moving target in multiple visual angles, wherein the images are collected by multiple cameras at each moment; obtaining multiple illumination images of the moving target at each moment through utilizing movement estimation and movement compensation; recovering by uniting the initial three-dimensional model and multiple illumination images to obtain normal information of the initial three-dimensional model; and carrying out combined optimization on geometrical information of the initial three-dimensional model and the normal information of the initial three-dimensional model to obtain an optimized three-dimensional model of the moving target. The invention also discloses a three-dimensional reconstruction device of the moving target under the variable illumination condition. In the method and device provided by the invention, advantages of multiple-visual-angle three-dimensional and luminosity three-dimensional methods are combined and the movement estimation and the movement compensation under the periodical variable illumination condition are combined so that the reconstruction of a high-precision three-dimensional model of the moving target is realized.

A three dimensional method for dividing medical image includes using canny operator for edge detection, using cosine function for contour interpolation, using operator and gradient information for generating total energy cost function as interactive dividing base, generating middle layer contour and seed point, regulating and revising contour for obtaining real dividing area.

The invention relates to the technical field of three-dimensional scanning, and provides a structured light three-dimensional method and system. The method includes the steps that an FPGA outputs a structured light image to a projector, and sends a trigger signal to a camera every time the FPGA outputs one frame of the structured light image to the projector; after the camera receives the trigger signal, a photograph is taken in real time for projections generated by the projector; the camera transmits the taken photograph to a computer; the computer conducts three-dimensional reconstruction according to the photograph transmitted by the camera. According to the method and system, synchronization of the projector and the camera in the structured light three-dimensional scanning process is achieved based on the FPGA, the structured light image is generated in real time through the FPGA, and the image is directly output to the projector through a video interface for projection; meanwhile, synchronizing signals are sent to the camera, the camera is triggered to take the photograph for the projected structured light image, so that accurate synchronization of the projector and the camera is achieved, and then high-speed structured light three-dimensional scanning is finished.

A method for building and paralleling a quasi three-dimensional electromagnetic environmental model on basis of a parabolic equation mainly adopts a sectioning method, i.e. an antenna transmitter is taken as a center, a three-dimensional space is divided into two separate two-dimensional sections according to a certain angle, so the complex three-dimensional electromagnetic environmental simulation problem is simplified into a two-dimensional simulation problem, then, an initial field of a quasi three-dimensional method is built from an antenna pattern, the complex geographical environment and the complex environment of an atmospheric structure are three-dimensionally sectioned, then, the solving process of the sectioned two-dimensional sections is accelerated through adopting a coarsness parallel computing method, the electromagnetic field distribution of the three-dimensional space is efficiently solved finally, and moreover, precision is not greatly lost. By the method, the electromagnetic field distribution of the space can be obtained without practical measurement, compared with a direct three-dimensional computing method, the computational complexity is greatly reduced, the computational scope is expanded to a larger extent, the computational efficiency is greatly improved, and strong basis is provided for the practical application requirement.

The invention relates to a mobile terminal-oriented three-dimensional label-cloud visualization method which comprises the following steps of: A. computing the association degree of labels and the association degree between the labels and online resources; B. displaying the first K labels with the highest association degree by using a three-dimensional method, wherein the font sizes and the colors of the labels are in direct proportion to the association degree of the labels; and C. according different mobile-terminal keys, supporting the switched browse between the labels and the online resources, and embedding the search boxes of the labels and the online resources. In the invention, aiming at the characteristic of the limited screen size of a mobile terminal, the first most-associated K labels or online resources are only displayed when the quantity of the labels is too large; and if a specific online resource can only be accessed through a specific label and the font of the label is quite small, the label or the online resource can be inquired through the embedded search boxes. The user experience of the mobile terminal based on label browse is markedly improved by the combination of the browse and the search based on labels.

The invention relates to a measuring method for CT (Computed Tomography) scanning and postprocessing and aims to provide a three-dimensional method for measuring femoral head-neck spatial angles. The method comprises the following steps: enabling a measured person to lie on the back on an examination bed, and enabling the middle sagittal line of the human body to coincide with the middle line of the examination bed; carrying out continuous data acquisition on the human body by adopting multilayer spiral CT scanning to obtain a thin-layer sequence, wherein the scanning range is from the upper edge of acetabulum to the lesser trochanter of femur; reconstructing a hip joint three-dimensional image based on the thin-layer sequence by using a three-dimensional postprocessing program, and removing unrelated structures such as the acetabulum and the like to obtain a femur three-dimensional image; and measuring the femoral head-neck extraversion angle, postversion angle and subversion angle. The technical scheme of the invention has the characteristic that the surface anatomical structure of the three-dimensionally restructured femur is displayed clearly, the position can be easily regulated, and the femoral head-neck spatial angles can be precisely measured.

The invention discloses a 2D video three-dimensional method based on sample learning and depth image transmission. The problem that in an existing 2D video three-dimensional process, computation complexity is high, and applicability is poor is mainly solved. The method comprises the steps that (1) two frames of 2D video images are input; (2) the best depth values of pixel positions of the first frame of video image are obtained through the method based on sample learning; (3) the best depth values are subjected to postprocessing; (4) the depth values of pixel positions of the input second frame of video image are obtained through a depth transmission technology; and (5) through a drawing technology based on depth images, input video images and the obtained depth values of the pixel positions are combined, and left-right-format 3D video is formed. According to the method, computation complexity is low, high-quality depth images which are obvious in moving foreground, clear in edge and natural in structure can be obtained, so that 3D video which is good in stereoscopic vision effect is formed, and the method can be widely used in video processing relevant to 3D televisions.

The invention relates to the field of powdered materials and 3D printing, in particular to a powder, binder and forming process of 3DP method three-dimensional printing. The method of preparing the powder includes steps of using metal powder with particle diameters of 15-45 [[mu]m as a matrix, adding polyvinyl alcohol powder with particle sizes of 120-300 meshes and starch with particle diametersof 5-20 [mu]m into the matrix, and mixing the powder evenly by a three-dimensional mixer to obtain a powder material; the method of preparing the binder includes steps of using distilled water as a base solution, and adding an ethanol solution and dissolving the polyvinylpyrrolidone powder in the base solution, specifically, the volume ratio of the distilled water to the ethanol is 9:1, and the mass fraction of the polyvinylpyrrolidone in the mixed solution of the distilled water and the ethanol is 0.1% -0.3%; and the 3DP three-dimensional method is used to spray the binder onto the prepared powder material to print into a three-dimensional blank, and a workpiece is obtained after the three-dimensional blank is subjected to drying, powder removing, debinding and sintering. By means of thepowder and the binder of 3DP method three-dimensional printing, defects of poor adhesion and poor fluidity of the powder and the binder of the conventional 3DP method are effectively overcome to a certain extent.

The invention discloses a method for rebuilding the shape of a hemisphere three-dimensional surface with control point information, which comprises the following steps of: building a standard hemisphere model, obtaining three hemisphere gray level images from three angles, and building a substance surface irradiance equation; uniquely ensuring a substance surface directional gradient with the substance surface irradiance equation and a luminosity three-dimensional method, processing by means of a variational method, and rebuilding a hemisphere three-dimensional surface f1 (x, y) from the directional gradient; and obtaining an interposition surface f2 (x, y) with an interposition algorithm and a hemisphere surface control point three-dimensional information, linearly superposing the f1 (x, y) and the f2 (x, y) to obtain three-dimensional information of each point of the surface of the substance to further obtain a rebuilt substance three-dimensional surface f3 (x, y). The method not only can fast measure the shape of the hemisphere three-dimensional surface, but also has high precision for measuring the obtained shape of the rebuilt hemisphere three-dimensional surface. An experimental result shows that the average relative error of the rebuilt hemisphere three-dimensional surface is reduced by about 1.3%.

The invention discloses an X-ray image-based three-dimensional object imaging method, which comprises the following steps of: 1, acquiring X-ray data, namely shooting an X-ray planar two-dimensional image of an object to be reconstructed every certain fixed angle by using X-ray image acquisition equipment to form a two-dimensional image sequence {Pt}, wherein t=1,2,3,...,n, and each X-ray planar two-dimensional image comprises an pixel subscript (i,j) in a detector of the X-ray image acquisition equipment, namely a column position and a row position corresponding to the pixel; 2, reconstructing a three-dimensional object, namely reconstructing the acquired X-ray planer two-dimensional image to obtain the three-dimensional texture representation of the object to be reconstructed; and 3, displaying the three-dimensional object, namely rendering the three-dimensional texture representation of the object to obtain the three-dimensional image of the object to be reconstructed. By utilizing the technology of reconstructing the three-dimensional representation of a corresponding object by a plurality of X-ray images, a more comprehensive, vivid and three-dimensional method for observing an internal structure of an object is provided.

The invention provides a method and a device for converting a single picture from two-dimension to three-dimension semi-automatically by adopting an optimization technology. The method comprises the following steps of: first, setting a plurality of depth values representing pixels by a user; then, modeling a depth map solving problem of the overall map into a constrained optimization problem; and finally, solving an optimum solution of the optimization problem by adopting a least square algorithm. By the semiautomatic conversion method provided by the invention, a high-quality depth map can be obtained by only a small amount of user participation, and a high-quality three-dimensional picture can be converted, so that the method and the device have a very wide application value in the field of three-dimensional content generation.

The invention relates to a method for manufacturing a plane solid state supercapacitor. The plane solid state supercapacitor is manufactured on a standard silicon wafer, standard methods, such as the chemical vapor deposition method, the physical vapor deposition method, the groove etching method, the chemical-mechanical polishing method and the three-dimensional method based on silicon through holes, in the semiconductor device manufacturing process are used, a composition composed of one kind or several kinds of SiO2, Al2O3 and HfO2 or Ba(Sr)TiO3 serves as a core, and the plane solid state supercapacitor is compatible with a standard semiconductor device. The plane solid state supercapacitor has the advantages of being low in cost, saving energy and being environmentally friendly and suitable for mass manufacturing.

The invention discloses a three-dimensional method for plane videos based on feedback control. The three-dimensional method comprises the following steps of: reading in key frames in a plane video frame sequence, and obtaining foreground objects of the key frames by an image segmentation algorithm according to inputted manual marks of the key frames; and generating a marking line of the foreground objects of the key frames in a closed loop feedback control mode, expanding the marking line to non-key frames frame by frame, recovering the foreground object of each non-key frame by the image segmentation algorithm, carrying out unified depth assignment on the foreground objects of the key frames and the non-key frames so as to obtain depth map sequences of the plane video frame sequence, and carrying out two-direction depth synthesis on the depth map sequences so as to a final depth map sequence. According to the method disclosed by the embodiment of the invention, only a few key frames are subjected to man-machine interaction operation, and the closed loop feedback control mode is adopted, thereby improving the efficiency and guaranteeing the accuracy of the depth map.

The invention relates to a three-dimensional method for determining the structure of an underground oil-gas reservoir. The method comprises the following concrete steps: obtaining a velocity field and a density field of transverse waves and longitudinal waves conforming to underground geologic structure by processing; carrying out linear encryption interpolation on a dispersion field renewedly according to observation system parameters and the dispersion field so as to adapt the requirement for rebuilding a wave field; rebuilding wave field values on each net point at each moment on the basis of the dispersion field; outputting a pure P wave field and a pure S wave field at a position where a demodulator probe is located at each moment to be used as a wave field rebuilding record of the moment; and comparing stacking and excursion sections obtained from wave field rebuilding and stacking and excursion sections obtained by processing field collected data to determine the configuration and the position of the structure of the underground oil-gas reservoir. In the invention, the recoded longitudinal wave and the recorded transverse wave obtained from wave field rebuilding are completely separated so that the separation of the longitudinal wave field and the transverse wave field is not needed in the subsequent wave field research.

The invention relates to a telemeasuring data-driving lunar explorer real-time monitoring method. According to the method, a two-dimensional method is combined with a three-dimensional method to display a working scene of a lunar explorer and an effective load of the lunar explorer in real time, the science exploration of the lunar explorer and the effective load of the lunar explorer in a three-dimensional scene is driven by utilizing telemeasuring data, which are downloaded from a planet in real time, of the lunar explorer and the effective load, and important parameter information of the lunar explorer and the effective load of the lunar explorer can be displayed in the three-dimensional scene in real time by adopting a way of a two-dimensional panel. The invention relates to a telemeasuring data-driving real-time monitoring system. According to the method, the working state of the lunar explorer and the effective load of the lunar explorer can be more intuitively displayed, so that the working state of the lunar explorer and the effective load of the lunar explorer can be more conveniently acquired by the working personnel, and evidence can be provided for formulating a scientific exploration plan.

The invention discloses a non-contact intraocular pressure detection system based on low-coherence optical interference. The system comprises an optical division and return optical path, a signal acquisition and calibration optical path, a reference arm optical path, a data acquisition and storage control module, a terminal data processing module and a display and mechanical control terminal. According to the system, intraocular pressure is measured on the premise that the inner surface layer of the cornea is pressed flat, a longitudinal three-dimensional method is adopted to process data, a fixation light source is arranged at the end, coaxial with a first convergent lens, of a semi-reflecting and semi-transmitting lens in the signal acquisition and calibration optical path, so that a scanning light source and the fixation light source are integrated to be coaxial with the gas injection direction, and therefore intraocular pressure measurement precision and speed are increased; besides, a light beam needs to be subjected to luminous power detection before entering the eyeball, so that detection safety is improved; meanwhile, in a gas generation device providing jet streams, a purifier is arranged between a piston and an air cavity, so that cleanness of jet streams is guaranteed; and due to the fact that the whole system is debugged before normal operation, safety, reliability and stability of the whole measurement process are guaranteed.

The invention provides a spaceflight product technical state management three-dimensional method. The spaceflight product technical state management three-dimensional method includes the steps: establishing a spaceflight product technical state management three-dimensional database including logic dimension, process dimension and method dimension, wherein any two of dimensions form one technical state action item including technical state identification, technical state control and technical state recording; technical state identification forms a technical state file tree for the overall process of product design and production; technical state recording forms management of modification of item files; and the function of the product technical state management three-dimensional system is totrack, control and manage physical characteristic parameters and functional performance parameters of the product during the production process, and to manage the out-of-tolerance, deviation and concession usage conditions. The spaceflight product technical state management three-dimensional method can perform management and classified statistical analysis on the large amount of technical state information, can realize systematicness, comprehensiveness, consistency and timeliness of technical state management, and is the effective approach of product technical state management.

The invention provides a detector for detecting a support of an automobile steering column, which is high in cost performance, simple in operation and complete in detection and comprises a base and an operation platform arranged on the base. A groove is positioned on the operation platform and has an arc bottom surface and a vertical lateral surface, the arc bottom surface and the vertical lateral surface of the groove are matched with the outline of the steering column, and detection openings corresponding to the support of the steering column to be detected are positioned on the bottom surface and the lateral surface of the groove. By means of the structure, a three-dimensional method which is expensive in price, complex in operation, high in requirements for operators and used for detecting whether parts are qualified is eliminated, multiple location base balance and coordinate transformation are not required, the defect that low measurement efficiency cannot meet production requirements is overcome, detection cost is greatly reduced, and the detector is especially suitable for detecting industrial mass-produced parts.

A multi-function printer includes a photo module, an output module and a process module. The photo module is used for obtaining at least one image information. The output module is electrically connected with the photo module for outputting the at least one image information obtained by the photo module. The process module is electrically connected with the photo module and the output module for controlling the information process and transition between the photo module, the output module and an external system. The multi-function printer adopts the photo module to replace the scan module of the prior art to obtain the images. Therefore, regardless of the resolution of obtained image, the present invention has a merit of rapidly obtaining the images. Moreover, the photo module also can obtain the images by a three-dimensional method and can be disassembled from the multi-function printer and operated alone as a general digital still camera.