60 results about "Geometric mapping" patented technology

A method of and service for optimizing an integrated circuit design to improve manufacturing yield. The invention uses manufacturing data and algorithms to identify areas with high probability of failures, i.e. critical areas. The invention further changes the layout of the circuit design to reduce critical area thereby reducing the probability of a fault occurring during manufacturing. Methods of identifying critical area include common run, geometry mapping, and Voronoi diagrams. Optimization includes but is not limited to incremental movement and adjustment of shape dimensions until optimization objectives are achieved and critical area is reduced.

The invention relates to the technical field of three-dimensional point cloud data processing and three-dimensional scene reconstruction, and discloses a three-dimensional laser scanner and camera calibration method based on geometric constraint. The method comprises the following steps: (1) making a calibration board; (2) acquiring a three-dimensional point cloud and a two-dimensional image of the calibration plate; (3) calibrating a camera; (4) calculating a calibration board plane in a camera coordinate system; (5) building point-surface geometric constraint; (6) constructing line-point geometric constraint; (7) constructing surface-surface geometric constraint; (8) calculating a geometric mapping relation of the point cloud and the image. The method has the advantages of deeply analyzing a structure of the three-dimensional point cloud, meanwhile, solving the geometric mapping relation between the point cloud in a laser coordinate system and the image in an image coordinate systemthrough three types of thoughts including the point-surface geometric constraint, the line-point geometric constraint and the surface-surface geometric constraint, making full use of the geometric relation between the calibration board plane and a laser scanning point, and consequently making calibration of the three-dimensional laser scanner and the camera be more accurate and reliable.

The invention is a method of rotating a catheter while it is manually guided in order to increase the volume of space it passes through during a geometric mapping procedure as to provide a higher and more uniform location data point cloud density in a volumetric mapping system.

The invention provides an urban area and indoor high-precision visual positioning system and method. The image information of a surrounding environment is acquired based on a visual sensor to realize high-precision urban area and indoor positioning. The method comprises the steps that the distinguishing feature information of an image is calculated and extracted after the visual sensor captures the scene image information; according to the distinguishing feature information, similarity degree recognition and matching are carried out in the feature information base of a digital three-dimensional model; according to matching coordinate information recorded in an image feature matching process, a geometrical mapping relation from a three-dimensional scene to a two-dimensional image is restored, and a camera intersection model from a two-dimensional image coordinate to a three-dimensional space coordinate is established to determine the three-dimensional position and attitude information of the visual sensor and a dynamic user; multi-source image information captured by the visual sensor is received; a digital three-dimensional model corresponding to a real scene is reconstructed or updated; and the feature information base is updated. According to the invention, robust and sustainable positioning ability is provided when the surrounding environment changes.

The invention combines a field working portable device such as a portable computer as a hardware platform for mobile GIS with satellite positioning technique and total station positioning technique to realize the whole process on illegally applied ground including transgress information collection, site image forming, displaying, editing, storing and refreshing. The portable computer is communicated with the total station via the connection with a wire cable serial-port line or wireless Bluetooth to receive and extract positioning information; meanwhile, the portable computer builds network connection with a monitoring central server via a mobile communication network to realize real-time satellite differential positioning, map data download, and site information upload. With the invention, the visual geometric mapping results is the final results and information inputting is easily achieved, so that the whole data process procedure is paper-free, electronized, real-time, fool-type, and intelligent, thereby greatly increasing field working efficiency, reducing labor intensity and reducing professional requirement for the measurement personnel.

A method of and service for optimizing an integrated circuit design to improve manufacturing yield. The invention uses manufacturing data and algorithms to identify areas with high probability of failures, i.e. critical areas. The invention further changes the layout of the circuit design to reduce critical area thereby reducing the probability of a fault occurring during manufacturing. Methods of identifying critical area include common run, geometry mapping, and Voronoi diagrams. Optimization includes but is not limited to incremental movement and adjustment of shape dimensions until optimization objectives are achieved and critical area is reduced.

Provided are three-dimensional still and animated object representations obtained from photos of real-life objects and their geometrical representations, allowing compact storage, fast rendering with high output image quality, suitable for animation purposes. The method includes transforming original data of a three-dimensional object into an intermediate representation; transforming data of the intermediate representation into a rendering representation in the form of a circumscribing cube, where a layered depth image is attributed to each face of the circumscribing cube, and rendering the obtained representation by determining visible faces of the circumscribing cube with account of the viewer's position, transforming the layered depth image for each of the visible faces into a texture, and visualizing the visible faces with texture.

A system and method for a real-time prognosis of a vehicle comprising a personal communication device comprising an arbitrarily oriented three-axis accelerometer configured to capture a pitch motion and / or roll motion of the vehicle and an onboard diagnostics system communicably connected with the personal communication device enabling bi-directional communication. The personal communication device comprising a processor configured for geometric mapping of a three dimensional Cartesian coordinate of the three-axis accelerometer with the vehicle. The processor virtually orients the coordinates of three-axis accelerometer to coincide with the coordinates of the vehicle. The arbitrarily oriented three-axis accelerometer is configured to capture a road condition and a driver behaviour using a sampling rate between 4 Hertz (Hz) to 10 Hertz (Hz). The system for the real-time prognosis of the vehicle, wherein the real-time prognosis utilizes at least one predictive analysis model to determine real-time prognosis for the said vehicle.

The invention discloses a design method of a solar energy uniform light superposition reflective condenser, wherein a light receiving surface is a photocell plate or a circular heat collection pipe. The design method is characterized in that a condensing lens consists of a limited number of flat plate reflection mirrors and broken line-shaped reflection mirror slot frames and is placed on a solartracking frame, a precise calculation formula of the width and the position of a space coordinate of each reflection mirror and the detailed steps of the geometric mapping method are deduced accordingto the constraint condition that two parallel light rays reflected by two end points of a line segment of a cross section of each reflection mirror respectively fall on two end points of a line segment of the cross section of the photocell plate or are respectively tangent with the circumference of the cross section of the circular heat collection pipe and the normal line of a mirror surface of the reflection mirror is an angle bisector of an included angle between incident light and reflected light, thereby ensuring that the reflected light of each flat plate reflection mirror is uniformly superposed on the light receiving surface, leading the single-chip output features of the photocell to be consistent, improving the light-emitting efficiency of components, leading the processing of the condenser to be easy and reducing the cost. The calculation formula can be used for optimizing the tilt angle and the nominal focal length of the photocell plate.

The invention provides a method for projected display on a textured plane in the technical field of computer-based image processing. In the method, firstly, a radiation model is established for showing that after the light output by a projector is reflected by a projection screen, the light is grabbed by a camera; secondly, the luminosity response function of the projector and the camera, and the color mixing matrices of the projector and the camera are measured; thirdly, the geometrical mapping between the projector and the plane of the camera are established through projected checkerboard images; fourthly, with the given luminosity response function of the projector and the camera, and the color mixing matrices of the projector and the camera, two gray scale images are projected, and the reflectivity information of the projected surface and the ambient light information are found; fifthly, the projected images are rectified and are projected again before the projected images are output according to the geometrical mapping as stated in the third step and the reflectivity information of the projected surface and the ambient light information as stated in the fourth step. After the projected images are rectified and the light is accelerated through a GPU, the speed can reach 60fps and meets the requirement for real time. The method is applicable to various practical circumstances.

Methods and systems are provided for displaying images onto an arbitrary surface, using a projector, such that the quality of the images is preserved despite surface imperfections or color variations. Methods and systems are also provided for controlling the appearance of a projection surface. Various embodiments use a detailed radiometric model and a calibration method to determine the pixel values required to be projected by a projector in order for a camera to observe a desired image. Other embodiments use a compensation algorithm that uses a feedback approach to provide the desired image compensation. Geometric mapping may be used to establish a correspondence between points in the images to be displayed by the projector and the corresponding points in the images that are captured by the camera.

A pixel compositor device for routing an incoming stream of pixel data having been rendered elsewhere and bound for being projected. The device includes a plurality of digital signal inputs each adapted for receiving a plurality of pixel information from the incoming stream of pixel data. The digital signal inputs are in communication with at least one buffer for the pixel information once received by the device. A processing unit is included for image warping the pixel information by performing, on each of a respective of the pixel information: (i) a mapping relating to location of the respective pixel information, and (ii) a scaling function. The geometric mapping can be performed by applying an interpolation technique; and the scaling function can be any of a number of photometric correction functions (alpha-blending, color uniformity correction, image brightness or contrast adjustment, etc.). Once an image warping has been performed on the respective pixel information, it is routed out of the device through one of several digital signal outputs. A system for routing pixel data is disclosed having two or more of the pixel compositor devices in communication with an image rendering cluster of units (as the source of the incoming stream of pixel data) and a plurality of projectors; as is a method for routing an incoming stream of pixel data having been rendered elsewhere and bound for being projected.

The invention discloses a method for quickly obtaining and measuring an orthophotoquad of a city skyline contour line facede. The method comprises the following steps of: shooting a local image of the city skyline contour line facede hop by hop by a camera with a coordinate obtaining device, and recording the coordinate direction and the lens orientation of the camera at each shooting time; obtaining the horizontal distance between each shooting point and an object to be shot; building a geometric mapping relationship between each shooting point and the object to be shot to generate the orthophotoquad of the city skyline contour line facede; and outputting measurement data of the orthophotoquad of the city skyline contour line facede in combination with the city skyline contour line facede and the orthophotoquad of the city skyline contour line facede. After the method is used, the image distortion error caused by the conventional technology can be reduced, and the measurement precision can be improved.

A reconstructable geometry mapping method is provided. The reconstructable geometry mapping method includes: extracting geometry information of a plurality of occluding geometry shapes of an object's front-face with respect to a light source's point of view; performing a consistency test on a testing pixel so as to determine an occluding geometry shape corresponding to the testing pixel from the object's front-face among the plurality of occluding geometry shapes, in which the occluding geometry shape includes an occluding point, and the testing pixel overlaps with the occluding point when viewing from the light's point of view; reconstructing a depth value of an occluding point corresponding to the testing pixel; and performing a shadow determination of the testing pixel.

The invention provides an efficient analyzing method for a superfine line structure object electromagnetic property, and belongs to the field of analyzing of a computational electromagnetic moment method. A section wavelet serves as a primary function in the moment method, fast wavelet transform is used, a sparse matrix can be obtained through calculation, and therefore the defects caused by a dense matrix are overcome, and a effect more accurate and efficient than that of traditional analyzing can be obtained. The method comprises the steps that firstly, an object is placed in an appropriate geometry coordinate system, and an electric field integral equation to which the surface current conforms is listed; secondly, the section wavelet serves as the primary function to carry out expansion on an unknown current; thirdly, geometry mapping is established and is substituted into an original matrix equation; fourthly, the matrix equation is solved; fifthly, the current distribution is obtained through solving, and the scattering problem is dealt with to obtain far field distribution. The method can serve as an efficient and accurate means for studying a wire antenna, and plays a significant role.

The invention provides an indoor positioning method. The method comprises the following steps: inputting a real-time obtained image, and detecting and outputting a currently located indoor environmenttype by an environment sensing module; performing indoor positioning by using a basic positioning module to obtain a regional level or meter level precision positioning range; matching the output environment type in the environment sensing module with a geographic database to obtain a precise range of the location; corresponding the obtained precise range to a three-dimensional model of a locatedindoor space, and performing two-dimensional-three-dimensional matching with the real-time obtained image in an image matching module; and restoring a geometric mapping relationship between a two-dimensional image and the three-dimensional model according to three-dimensional-two-dimensional matching point pair coordinates, establishing a camera projection model of the two-dimensional image to the three-dimensional model, and solving a three-dimensional space coordinates and pose of an image sensor to obtain final result positioning. According to the method, on the basis of the common indoorpositioning technology, the image recognition technology is imported to effectively improve the precision of indoor positioning.

The invention discloses an ultra-precise displacement laser sensing method. According to the method, ultra-precise measurement is performed on the displacement of an object on the basis of an ultra-precise laser displacement sensor. The ultra-precise laser displacement sensor comprises a laser emitting device, a circular arc specular reflecting device, a laser receiving device and a controller; and the controller calculates the displacement value of the object to be detected according to a geometric mapping relationship between the change amount of a light receiving position on the laser receiving device and the surface position amount of the object to be detected. According to the ultra-precise displacement laser sensing method of the invention, the circular arc specular reflecting deviceis additionally arranged on an optical path from the reflected laser of the object to be detected to the laser receiving device; the position of a laser spot finally projected onto the laser receiving device changes greatly on the basis of the change of the angles of incidence of different laser beams on a circular arc mirror surface, the laser beams being identical in direction and different inincident position; and therefore, the displacement of the object to be detected is amplified at a high magnification on the laser receiving device, and the ultra-high precision measurement of the object to be detected is realized when the resolution of the laser receiving device is constant.

The invention provides a multi-lens panoramic linkage device and a method thereof, comprising the following steps of adopting integrated circuit chip technology: a preprocessing module processes a plurality of collected original images to obtain a plurality of real images; the panoramic mosaic module adopts the mosaic combination of multi-image geometric mapping transformation to mosaic the real image and adjust the whole image to get the panoramic mosaic image. The multi-dimensional vision processing module calculates the real image logically in multiple visual dimensions to obtain the functional image. The linkage combination module detects the target region in the panoramic mosaic image, and collects the local enhancement region matched with the target region in the functional image, and linkages the local enhancement region with the panoramic mosaic image to obtain the panoramic linkage image and linkage parameters. The invention integrates all logic modules in one chip, so as to enhance the linkage effect of the whole and the part, look at the whole situation and grasp the details, improve the response speed of the panoramic splicing linkage, reduce the development cost, and reduce the development difficulty and the product volume.

The invention discloses a robot kinematics parameter calibration method and device, a computer facility and a storage medium, and relates to the technical field of robot calibration. The robot kinematics parameter calibration method comprises the steps that a server acquires a measurement data set of each shaft of a target robot to be calibrated, coordinate vectors of each shaft in a base coordinate system of the target robot are determined according to the measurement data set of each shaft, the geometric mapping relationship between every two adjacent shafts is determined, and kinematics parameters of each shaft are determined according to the coordinate vectors of each shaft and the geometric mapping relationship of the shafts. According to the robot kinematics parameter calibration method, the kinematics parameters of a connecting rod between every two adjacent shafts are determined according to the geometric mapping relationship between every two adjacent shafts of the robot, andare not affected by the machining precision and the assembly precision of each shaft of the robot, and therefore the precision of the kinematics parameters can be improved.

A reconstructable geometry mapping method is provided. The reconstructable geometry mapping method includes: extracting geometry information of a plurality of occluding geometry shapes of an object's front-face with respect to a light source's point of view; performing a consistency test on a testing pixel so as to determine an occluding geometry shape corresponding to the testing pixel from the object's front-face among the plurality of occluding geometry shapes, in which the occluding geometry shape includes an occluding point, and the testing pixel overlaps with the occluding point when viewing from the light's point of view; reconstructing a depth value of an occluding point corresponding to the testing pixel; and performing a shadow determination of the testing pixel.

The invention discloses a multi-view depth acquisition method, relates to the field of computer vision and the technical field of deep learning, solves a depth map by using a machine learning mode, and has better robustness for shooting angle problems such as wide baselines and complex texture and shadow problems such as rough areas, weak texture areas and shielding. A CBAM attention mechanism is introduced into a feature extraction module, and features obtained by convolution each time are sorted in two directions of a channel dimension and a space dimension. Hopping layer connection in a feature extraction Unet structure ensures that high-level information is not covered, and low-level information is obtained at the same time. The feature extraction Unet and the CBAM attention mechanism fully consider the relation of geometric mapping of different view angles, and the recognition capability of the feature extraction module on different view angle features is improved. In a cost regularization part, a mode of combining 3D convolution and bidirectional long short-term memory (LSTM) is used, and the three-dimensional variance characteristics are regularized from two aspects of depth dimension and channel dimension, so that the network processing is improved, and the generation speed is high.

The invention provides a method, an apparatus, a storage medium and a terminal device for detecting a face angle, wherein, the method comprises the following steps of: acquiring a face image of a detection object; obtaining pixel information of pixel points of the face and positions of each pixel point by using a two-dimensional geometric circle to locate the face of the face image; determining aposition of each pixel point in the three-dimensional geometric model according to a position of each pixel point in the two-dimensional geometric model and a geometric mapping relationship between the two-dimensional geometric model and the three-dimensional geometric model; determining a face angle of the detection object based on pixel information of each pixel point at a position of the two-dimensional geometry and a position of the three-dimensional geometry model. The invention improves the accuracy of detecting the face angle.

A system is disclosed for incorporating a realistic simulated catheter or catheters within a catheter guidance and control system that operate from the same closed-loop position control feedback and geometric mapping data as the real position control system and are able to make contact with real and simulated datasets. These catheters may be operated in a pure simulation mode without interacting with real catheters and position control hardware, or may be used as control cursors to enhance the placement of catheter positioning targets. The catheter tip, which is focus of magnetic control, is realistically guided by the control system parameters, while the remainder of the catheter line is realistically constrained by the mapped chamber geometry and introducer sheath.

The invention discloses a natural resource real-time video monitoring method and system with vector red line data embedded, and the method comprises the steps: obtaining the natural resource vector red line data and a corresponding high-resolution remote sensing image, and obtaining an initial image of a camera; superposing the vector red line data onto the high-resolution remote sensing image, identifying homonymous points on the video image and the vector red line data by means of semantic information of the remote sensing image, and calculating a geometric mapping relationship; mapping thevector red line data to a real-time video to obtain a video monitoring area; matching adjacent frame images of a monitoring video to obtain homonymous points by obtaining feature points which are uniformly distributed in scale and space; obtaining a geometric transformation relationship between the images according to the homonymous points, and mapping the monitoring area range on the previous frame of image to the next frame of image to realize association of the monitoring areas between the image frames; and performing area measurement on the monitoring video according to the geometrical relationship, and performing subsequent related target motion analysis on the basis of the determined video area so that automatic area early warning alarm can be realized.

The invention discloses a method and system for computing three-dimensional space layout based on a scattered perspective image. The method comprises the following steps: extracting a composition cue of a digital image; diffusing the composition cue through interpolation and establishing a successive cue on image space; establishing the geometric mapping relation, which is described by the digital image, between the digital image and the three-dimensional space supporting surface according to the successive cue; and giving any point on the digital image and computing the point of the previous point in the three-dimensional space according to the supporting point position on the image corresponding to the target on which the previous point is located and the geometric mapping relation. The invention takes the drawing principle of the artists as the starting point, gives the scattered perspective geometric solution, establishes the relation between the scattered perspective image and the three-dimensional space described by the image, can effectively locate the target in the image in the three-dimensional space described by the image and ensures consistent location effect and perception effect.

The present invention is a non-coherent optical fiber apparatus that may be used for imaging. Methods are described to produce geometric mapping data for an optical fiber apparatus. Images may be transmitted, reconstructed (using mapping data for the apparatus) and displayed. In addition, one or more fiber characteristics may be measured and used in conjunction with mapping data to further improve or correct the geometric, photometric or spectral content of images. The apparatus data described may be provided, by a manufacturer, for example, in raw form, or this data may be may be provided in a manner that is more user transparent, such as incorporating it into various image processing algorithms.

The invention discloses a laser welding head dynamic track generation method based on a platform motion tangent angle, the swing track of a laser welding head rotates according to the current X-axis and Y-axis motion track tangent direction to form a laser welding head track with an angle following function, the laser welding head track at the moment realizes dynamic generation of track data, and the laser welding head track has the angle following function. The angle control data of the galvanometer needs to be recalculated periodically according to angle parameters. Under a two-dimensional coordinate system, a Bezier curve is used for representing the swing track of a laser welding head, original coordinate points and a geometric transformation matrix are multiplied through second-order matrix multiplication, new coordinate points after geometric mapping and a new curve calculated through angle following are obtained, discretization is carried out, and control data of a galvanometer motor are obtained. The laser welding head swing track with the angle following function can better adapt to the process requirements of various machining tracks, meanwhile, the output density of laser energy is more uniform, and the final welding effect is improved.