702 results about "Coordinate mapping" patented technology

A scheme for graphical user interface using a polygonal-line-shaped slider that enables a user to intuitively manipulate-and playback spatio-temporal media data such as video data and animation data without deteriorating the temporal continuity of the data in interactive manipulation and playback of the spatio-temporal media data is disclosed. In this scheme, the slider is composed of a polygonal line composed of at least one segment and a coordinate indicator that is moved along the polygonal line. Data corresponding to coordinates specified by the coordinate indicator is entered. The apparatus according to present invention stores the coordinates of vertexes of the polygonal line, stores input coordinates, maps the input coordinates onto a point on the polygonal line, and positions the coordinate indicator at the point.

A notebook computer that has a keyboard, a navigation input device (e.g., a touchpad or mouse) and a sketch input device (usually an integrated sketch pad and stylus). The sketch input device operates in an absolute coordinate mapping mode and can be tracked on the display when hovering or touching. It draws digital ink when touching. Whenever the digital ink runs into existing text notes the text is reflowed around the sketch. A movement on an input device can either select text or draw digital ink depending on which input device was used. The computer can have sketch tool buttons operable with a stylus. The navigation and sketch input devices can be disjoint or overlapping. Variations of the sketch input device include a second touch pad that works with a finger and a stylus that works without a sketch pad.

The invention relates to a distortion correction method of a fish eye lens, which is characterized by comprising two steps that: step 1: a coordinate map of a fish eye lens image is established and saved in a memory; and step 2: according to the coordinate map saved in step 1, a fish eye image is obtained by the fish eye lens in the step 1, a target image is recovered through a look-up table method, and the target image is output as the image after distortion correction. Compared with the prior art, the method can set various parameters and produces various coordinate maps for different fish eye lenses, and improve the fish eye correction accuracy; after the maps are put into the memory, the image processing time is not restricted by the complexity of algorithm but mainly decided by the access time of the memory; and therefore, the distortion correction method of the fish eye lens greatly improves the fish eye image distortion correction speed and efficiency, and meets the real-time requirement in industrial application.

A method for automatic left ventricle segmentation of cine short-axis magnetic resonance (MR) images that does not require manually drawn initial contours, trained statistical shape models, or gray-level appearance models is provided. More specifically, the method employs a roundness metric to automatically locate the left ventricle. Epicardial contour segmentation is simplified by mapping the pixels from Cartesian to approximately polar coordinates. Furthermore, region growing is utilized by distributing seed points around the endocardial contour to find the LV myocardium and, thus, the epicardial contour. This is a robust technique for images where the epicardial edge has poor contrast. A fast Fourier transform (FFT) is utilized to smooth both the determined endocardial and epicardial contours. In addition to determining endocardial and epicardial contours, the method also determines the contours of papillary muscles and trabeculations.

The invention provides a method and a system for measuring speed of moving targets, which aims to solve slow response and other problems of the prior speed measurement method. The method comprises the steps of utilizing the basic principles of projective geometry, determining pixel coordinates in images and the coordinate mapping relation of pixels in real space through a camera calibration technique, utilizing the mapping relation to detect sequence frame images acquired by cameras, calculating the coordinates of the moving targets in the images in the real space, obtaining the motion curves of the moving targets in the real space through target tracking and then estimating the speed of the moving targets. The speed measurement method based on camera calibration has the advantages of fast response, large amount of detected information and capability of estimating the speed of all vehicles within a monitoring range in real time. Moreover, as the speed measurement of vehicles can be realized by utilizing the cameras, the method is easy to implement, lower in cost and easy to popularize and apply.

A system for retrieving information from a document. The system includes a document model representative of the document having a plurality of data structures representative of components within the document and a thumbnail image registered with the document model. The registration is accomplished by mapping selected coordinates within the thumbnail image to a data structure selected from the plurality of data structures. In this manner, a user can interact with the thumbnail image coordinates to retrieve data from the document as a function of the components mapped to those coordinates. In a further embodiment of the invention, the retrieved information may be streamed to a word-at-a-time display. This is particularly useful when used in connection with the display of low-resolution images on hand-held devices.

A method is disclosed for mapping finger movements on a touch pad to a display screen. The method includes receiving touch data from a touch pad. The touch data identifies the absolute coordinates of one or more finger touch points on the touch pad. The method also designates a portion of the display screen as a portion mapping area. The size of the portion mapping area is less than the size of the entire display screen area. The method then maps the coordinates of the one or more finger touch points of the touch data to the coordinates of the portion mapping area. The method includes use of a primary touch pad and a secondary touch pad to generate multi-touch finger gestures.

The invention claims for protection of a coordinated local path planning method based on V2X communication and binocular vision. An OBU acquires vehicle body information and environmental informationthrough a binocular preposed camera, OBD equipment and V2X communication and the information is transmitted to a coordinated local path planning controller; with a traffic object mixed state estimation model, state prediction is carried out on a traffic object state, spatio-temporal data fusion is carried out on the traffic object information and traffic rules after state estimation based on a multi-source data fusion algorithm, a traffic road map with high credibility is constructed by the fused traffic data according to a coordinate mapping model, an own vehicle state is calculated by combining own vehicle information according to an own vehicle state estimation model, and then an optimal smooth driving path of the current vehicle is calculated based on an improved local path planning algorithm; and then the path is transmitted to the OBU and the information is broadcasted to other vehicles through V2X. According to the invention, the accuracy of vehicle environment perception and local path planning is improved by combining visibility-range and non-visibility-range traffic object sense sensing.

The invention relates to a point cloud data partitioning method based on three-dimensional laser radar. The method comprises the following steps of: (1) establishing a radar coordinate system oxyz of tested vehicles; (2) preprocessing the radar data acquired by the laser radar, establishing a region of interest under the radar coordinate system oxyz and filtering out ground noise; (3) establishing an image coordinate system o'uv, and defining the mapping relation between the radar coordinate system oxyz and the image coordinate system o'uv; (4) testing vehicles on a radar cloud picture directly by using an image processing algorithm, and characterizing all tested vehicles (except the testing vehicles) in the region of interest by using a bounding box so as to obtain four vertex coordinates of the bounding box of the tested vehicles under the image coordinate system o'uv; and (5) mapping the four vertex coordinates of the bounding box under the image coordinate system o'uv in step (4) to the radar coordinate system oxyz according to the coordinate mapping model so as to obtain the shape vector parameters of the tested vehicles according to the position vector parameter of the tested vehicles. The method is high in operation efficiency, test precision and reliability, and can be widely applied to the technical field of vehicle environment sensing.

A table monitoring system and method for monitoring a table games. In one embodiment, the system comprises an RFID system and a processing engine. The system may include a camera, and image controller, or both. The system creates RFID data and image data in response to table events and its processing engine cross-references this data with time stamps to monitor table events such as wagers, payouts, or other occurrences. The data is associated with a tag which represents a table event. Table events are tracked during play. In one embodiment, the RFID data and image data is mapped to a coordinate grid. With the coordinate mapping and by cross-referencing this data, the system can distinguish individual table events occurring within the detection zone of a single RFID antenna such as distinguishing wagers placed on multiple bet locations within the detection zone of a single antenna.

The invention discloses a rapid image splicing method based on wide-angle lenses. The method includes the steps that firstly, distortion correction is conducted on images acquired through the wide-angle lenses; secondly, cylindrical surface mapping is conducted on the images on which distortion correction is conducted, and a two-dimensional discrete coordinate mapping table is generated for each wide-angle lens; thirdly, the two-dimensional discrete coordinate mapping table of each wide-angle lens is loaded, and distortion correction and cylindrical surface mapping are sequentially conducted on the distortion images acquired through the wide-angle lenses according to the tables; fourthly, translation parameters between adjacent visual angle images on which cylindrical surface mapping is conducted are acquired, and the adjacent visual angle images are registered; fifthly, the registered adjacent visual angle images are fused, wherein Laplacian pyramids are established for registered adjacent visual angle image sequences respectively, linear fusion is conducted on a high-frequency pyramid image overlaying region and a low-frequency pyramid image overlaying region, and then a fused image of the adjacent visual angle images is obtained. The method has the advantages of being high in splicing speed and real-time performance.

Disclosed are a trigger and control method and system of a human-computer interaction operation command and an associated laser emission device, the method comprising: utilizing a camera device to shoot a display area outputted by an image output device; determining the coordinate mapping transformation relationship between the shot display area and the original image output by the image output device; detecting a laser point in the shot display area, and transforming the coordinates thereof into the coordinates in the original image according to the relationship; when the laser point is identified to transmit the code signal corresponding to a certain human-computer interaction operation command, triggering the human-computer interaction operation command corresponding to the code signal at the coordinates in the original image correspondingly transformed from the coordinate of the laser point. The present invention facilitates a user in conducting medium range and long range human-computer interaction operations.

The invention discloses a method capable of amplifying and tracking a goal in a master-slave mode between a fixed camera and a pan tilt zoom (PTZ) camera and relates to the field of video surveillance. The method capable of amplifying and tracking the goal in the master-slave mode between the fixed camera and the PTZ camera achieves that the goal in an image is quickly amplified and tracked in the master-slave mode. The method includes the steps of building matching relation between view of the wide angle fixed camera and view of the PTZ camera, thereby converting a goal image coordinate found in the fixed camera to a corresponding PTZ control command, controlling PTZ to automatically aiming at the goal to appropriately zoom, and driving PTZ camera by a tracking result of the fixed camera to keep tracking to the goal. The method capable of amplifying and tracking the goal in the master-slave mode between the fixed camera and the PTZ camera has the advantages of being capable of achieving 'what you see is what you get' due to the fact that the goal is directly clicked and selected through the fixed camera with the wide view angle, fast in response speed of a user, simple and convenient, good in user experience, capable of avoiding difficulties in dynamic tracking to form a reliable solution by adopting the mature static camera goal tracking technology and matching with fixed PTZ camera coordinate mapping steps with high reliability.

The invention discloses a method of a virtual surgery and a device thereof. The method comprises the following steps: a geometric model of a virtual surgical instrument is read, and an operation object model is generated based on imported operation object model files; the coordinate mapping of the virtual surgical instrument is established based on the corresponding relation between the geometric model and the virtual surgical instrument; the virtual surgical instrument and the operation object model are detected whether to have collision; if the virtual surgical instrument and the operation object model are detected to have collision, force feedback of the virtual surgical instrument is calculated based on a force feedback model of a mass point or the force feedback model of a virtual ball; meanwhile, the position information of the operation object model after collision is calculated; and the coordinate position of the operation object model is updated. The method of the virtual surgery and the device thereof can simulate the operation of various practical surgical instruments; moreover, an operator can obtain the timely force feedback of the virtual surgical instrument and visual feedback of the operation object model.

The invention discloses a bidirectional mapping precise interpolation-based cylindrical panoramic expansion method for a refractive-reflective all-directional picture, which comprises the following steps: mapping a target pixel point in a cylindrical panoramic image into an original acquired all-directional picture according to a positive projection formula that any point in a cylindrical panoramic space is refractive-reflectively imaged to the all-directional picture to accurately and conveniently select and position a neighborhood reference point used for interpolation; and reversely mapping the neighborhood reference point into a cylindrical panoramic space to be generated according to a coordinate mapping relationship that any point in the all-directional picture is reversely mapped to the cylindrical panoramic space, and returning the neighborhood reference point to the cylindrical panoramic image without annular distortion to perform image interpolation on the current target pixel point so as to obtain high-precision cylindrical panoramic expansion picture. The method of the invention avoids the adverse effect of the nonlinear imaging distortion of the original panoramic picture on the neighborhood reference point, and effectively improves the image quality and expansion speed of the cylindrical panoramic expansion picture.

The invention discloses a wireless induction interactive system based on infrared light motion capture, which comprises a coordinate mapping method from a three-dimensional space point to a screen based on the infrared light motion capture. In the system, a position and a motion track of an infrared light-spot are captured by using an infrared camera and positioned at a corresponding position on a screen through a mapping algorithm, a control component on the screen is controlled and a novel three-dimensional space wireless induction interactive system is realized. The system expands a traditional simple control mode based on a remote controller and realizes the interactive control similar to a mouse for screen images in the three-dimensional space. Based on the interactive system, a screen menu can be controlled by gestures and postures and handwriting input can be realized after a handwriting recognition module is added. The system is very suitable for use in a digital home, and can expand the function of the traditional remote controller, realize television menu control and home control in the three-dimensional space and provide the application of media walls, interactive games, electronic whiteboard and the like.

The embodiment of the invention provides an image correction method, apparatus, device and system, a camera device and a display device. The method comprises: obtaining an image to be collected; based on a predetermined mapping relation, obtaining coordinates corresponding to coordinates of each pixel point in the image, and constructing the correction coordinates of each pixel point; and according to the correction coordinates of each pixel point, generating the correction image of the image. According to the embodiment of the invention, different distortion correction operations are not needed aiming at different distortions, and the coordinates of the pixel points in the image after correction distortion can be directly mapped through the predetermined coordinate mapping relation and the coordinates of the pixel points in the image to be corrected. the distortion correction operation can be simplified while effectively correcting the distortion so as to reduce the destroy degree of the distortion correction operation for the image information and reduce the calculation resource consumed by the distortion operation.

The invention relates to a three-dimensional focus imaging method for a side-looking chromatography synthetic aperture radar, which comprises the steps: converting collected original echoed data of the side-looking chromatography synthetic aperture radar to a slope distance wave-number domain and an azimuth wave-number domain, performing elevation frequency spectrum aliasing-free recovery on converted signals and converting the signals to a slope distance three-dimensional wave-number domain, an azimuth three-dimensional wave-number domain and an elevation three-dimensional wave-number domain; converting the signals in the three-dimensional wave-number domains to a rectangular coordinate system by coordinate mapping; and reconstructing a three-dimensional microwave image containing slope distance, azimuth and elevation spatial location information of imaging areas and magnitude-phase information by inverse Fourier transform and image space selection. The method can precisely reconstruct three-dimensional microwave images in the imaging areas without geometry correction on the condition that elevation hits are less, the distribution of elevation synthetic aperture centers is arbitrary or the size of the imaging areas are arbitrary. The method can be also used for the reconstruction of three-dimensional microwave images in imaging observation geometries such as downward-looking, downward side-looking chromatography SARs, and the like.

A method for designing Wavelets for communications and radar which combines requirements for Wavelets and finite impulse response FIR filters including no excess bandwidth, linear performance metrics for passband, stopband, quadrature mirror filter QMF properties, intersymbol interference, and adjacent channel interference, polystatic filter design requirements, and non-linear metrics for bandwidth efficient modulation BEM and synthetic aperture radar SAR. Demonstrated linear design methodology finds the best design coordinates to minimize the weighted sum of the contributing least-squares LS error metrics for the respective performance requirements. Design coordinates are mapped into the optimum FIR symbol time response. Harmonic design coordinates provide multi-resolution properties and enable a single design to generate Wavelets for arbitrary parameters which include dilation, down-sampling, up-sampling, time translation, frequency translation, sample rate, symbol rate, symbol length, and set of design harmonics. Non-linear applications introduce additional constraints. Performance examples are linear communications, BEM, and SAR.

The invention discloses a method and a device for receiving touch in a mobile device. The method includes the following steps: judgment: whether a user touches a specific position on a touch interface is judged, and if so, then the step of screen capture is executed; screen capture: the display screen interface of the mobile device is captured, so that a captured picture is obtained, and the captured picture is displayed; and the step of touch receiving is executed; touch receiving: the touch operation of the user on the captured picture is received, and the coordinates corresponding to the touched spot of the captured picture are mapped as the actual coordinates of the touched spot on the display screen interface; and the step of touch generation is executed; touch generation: a touch message of the touch interface touched at the actual coordinates is generated. The method solves the problem that the finger can hardly reach the entire screen when the large-screen mobile device is operated by a single hand.

The invention discloses an image splicing method by means of a blocking operation. The method comprises the following steps of acquiring an original image which is photographed by multiple cameras, and a preset coordinate mapping table; based on the preset coordinate mapping table, determining a correspondence between a panoramic image and pixel coordinates of the original image, and dividing the original image into a plurality of small blocks with the same size by means of blocking operation; performing projection mapping on the pixel values of the pixels in each small block in the original block after blocking interpolation, and obtaining a final panoramic image according to a mapping result. According to the image splicing method, an operation is performed on the divided source image blocks and a correspondence is found through using each block as a unit. The pixel values of the source pixels are projected into target pixels according to the positions of the target pixels, thereby obtaining a panoramic picture which corresponds with a to-be-processed picture. The blocking operation based on a genetic algorithm reduces redundancy rate of the small blocks so that the processing speed of the panoramic image splicing method based on the blocking operation is greatly improved on an FPGA.

The invention discloses a trigger control method and system of a man-machine interaction operating instruction and a laser emission device which is matched with the system to be used. A display area output by an image output device is shot by a photographic device; a coordinate mapping transformation relation between the shot display area and an original image output by the image output device is determined; a laser point is detected in the shot display area, coordinates of the laser point are determined, and the detected laser point coordinates are converted to coordinates in the original image output by the image output device according to the coordinate mapping transformation relation; and simultaneously, a coded signal of the laser point is recognized, and when a coded signal which corresponds to a certain man-machine interaction operating instruction is sent by the laser point is recognized, the man-machine interaction operating instruction corresponding to the coded signal is triggered at a position of original image coordinates which are correspondingly converted from the laser point coordinates. By means of the trigger control method and system of the man-machine interaction operating instruction and the laser emission device, a user can conveniently perform intermediate-range and long-range man-machine interaction operations.

The invention provides a touch terminal, and a one-hand operation method and device of a large-screen touch terminal. The method includes the steps of when receiving a command of entering a one-hand operation mode, displaying a first area and a second area on a screen of the touch terminal in a preset form; using the first area as a control area and the second area as an area which cannot be touched by a user with one hand; detecting a touch of the first area, and mapping the touch to the second area by coordinate mapping; when receiving a command of quitting the one-hand operation mode, hiding the first area and the second area. The touch terminal, and the one-hand operation method and device of the large-screen touch terminal have the advantages that the touch screen can be operated in full range by the user with one hand and the problem that operating the large-screen touch terminal with one hand is difficult is solved.

The iris recognition method based on image segmentation and 2D wavelet transformation comprises: dividing the iris positioning into the key-point inner edge and an outer edge positioning; by mapping technology from Cartesian coordinate to polar coordinate, normalizing positioned image into a fixed gray matrix; then taking image segmentation for two times into 18 sub-areas finally; taking 2D wavelet transformation to extract the wavelet coefficient and variance as feature values from main wavelet channel; in matching and recognition algorithm, using reciprocal variance sum and different weighing values to obtain final result. Compared with prior art, this invention has well noise-proof feature and high recognition ratio without losing real-time.

The present invention provides a smart body temperature screening system (100) at controlled area and includes: images of controlled area (110); an IR image capturing and thermal analysis system (120) configured to take in digitized IR images sequences and determine the pixel coordinates with temperature higher than pre-determined thresholds; a color image capturing and location tracking system (130) configured to capture the color image sequence and determine the pixel coordinates of human, combine the pixel coordinates from the IR image capturing and thermal analysis system with the pixel coordinates of human to identify the pixel coordinates of feverish suspects with above threshold temperature; a facial image capturing system (140) configured to capture the pictures of the feverish suspects according to the pixel coordinates of feverish suspects and the original color images from the color image capturing and location tracking system; a virtual floor plan visualization system (150) configured to map the pixel coordinates of feverish suspects on to a virtual floor plan; a machine learning system (160) configured to use machine learning to minimize the influence of environmental factors and improve the accuracy for detecting the feverish persons from the feverish suspects. The present invention can smartly identify and locate fever suspects without locking the fever suspects in a specific area.

A method for constructing a georeferencing-enabled camera model and its deployment in georeferencing targets located in video sequences due to a single video camera. A video surveillance camera is modeled by a collection of rays converging at a virtual camera point and the retina resolution cell coordinates associated with those rays wherein the ray equations are first established, in the course of a calibration process, for a given camera view, with the aid of other views of the same video surveillance camera, as necessary, and using such a model for mapping image coordinates to terrain coordinates and vice versa in the intended view or its adaptation for use in other views of the same video surveillance camera.

The invention discloses a hand-eye calibration method of an industrial robot; the hand-eye calibration method can deploy a camera and a calibration plate, a plurality of calibration data collection points are set in a working plane area of the industrial robot and the coordinates in the industrial robot base coordinate system are recorded; and then the tail end of the operating arm of the industrial robot is controlled to drive the calibration plate to rotate around a central shaft at the tail end of the operating arm; during this process, the camera is controlled to collect the image of the calibration plate at different positions extract the calibration point from the image; the coordinates of the center of the circle are calculated according to the coordinates of the same calibration point in the calibration plate image at different positions; and the coordinate is the coordinate of the tail end of the operating arm in the camera image coordinate system, so the coordinate mapping data of the industrial robot coordinate system and the camera image coordinate system is obtained; the conversion matrix between the industrial robot base coordinate system and the camera image coordinate system can be calculated according to the data, so the automatic hand-eye calibration of the industrial robot is realized.

The invention discloses a component multiple size measuring method and system based on binocular vision. The component multiple size measuring method based on binocular vision includes the steps: performing binocular camera calibration on original left and right images to obtain the binocular calibration parameters, and performing distortion correction on the left and right images after binocularcamera calibration to obtain first left and right images; performing polar correction on the first left and right images to obtain second left and right views; based on polar threshold constraints, mapping the points to be matched in the second left and right images to the corresponding grey-scale map to obtain characteristic points; based on a triangulation principle, according to the binocular calibration parameters and a parallax map, obtaining the three dimensional coordinates of the characteristic points; and according to the three dimensional coordinates, performing space curve and linefitting to obtain the target size, and taking the target size as the size of the component. The component multiple size measuring method and system based on binocular vision can solve the technical problem that a current binocular vision measuring method is difficult to match characteristic points.