272 results about "Line matching" patented technology

The present invention discloses a method and system for computerized ordering at least one product being a part of a final shopping list. The system comprises a first computerized trolley configured to facilitate a user to select at least one product among products being offered by one or more shops associated with the first trolley, thus giving rise to at least one first computerized order line corresponding to the selected product and being a part of a first shopping list; at least one second computerized trolley, each one of said second trolleys configured to automatically generate at least one second computerized order line matching to said first order line and comprising a product being offered by one or more shops associated with the second trolley, said second order line being a part of a second shopping list; wherein the final shopping list is configured to be based on said first shopping list or on said second shopping list. The method comprises providing said first computerized trolley, providing at least one said second computerized trolley, and facilitating compiling the final shopping list on the basis of said first shopping list or said second shopping list.

The invention provides an automatic spraying system based on point cloud and image matching. The automatic spraying system comprises a three-dimensional scanning module, an automatic trajectory planning module, a visual matching module and a spraying module. The three-dimensional scanning module is used for scanning a spraying object and acquiring a point cloud model according to scanned three-dimensional point cloud data; the automatic trajectory planning module is used for planning spraying trajectories in a point cloud space; the visual matching module is used for acquiring a transformational relation between a point cloud coordinate system and a spraying robot coordinate system; the spraying module is used for automatically spraying the spraying object. The automatic spraying system has the advantages that an algorithm is planned automatically according to a robot spraying path of the point cloud coordinate system, the point cloud coordinate system is correlated with the robot coordinate system according to the cloud point and image matching algorithm, and accordingly, automatic spraying of the spraying object is realized; on the basis of guaranteeing spraying efficiency, the spraying quality is improved greatly, calculation quantity for trajectory planning is reduced, and trajectory planning quality is improved.

The invention relates to a bend pipe measuring and allowance locating method facing digital manufacture. The method comprises the following steps that multiple sensors are calibrated globally by meansof a laser tracker and a target, and coordinate systems of the sensors are unified into a global coordinate system; the sensors collect bend-pipe images and carry out edge detection and morphologicalrefinement to obtain a center line of the bend pipe in a strictly synchronous way, and 3D reconstruction of the center line is carried out in a bidirectional polar line matching algorithm; the centerline is dispersed into space point cloud, a control point, straightway end points and an arc center point of an arc segment are calculated, and 3D molding is carried out by taking the center line asa guiding line; and a design model matches a measurement model via a nearest point iteration method, the allowance position is calculated. Thus, self-locating cutting and welding of the bend pipe is realized, and the digital manufacturing process of the bend pipe is accelerated.

The invention provides a fixed frequency scanning leaky-wave antenna based on a liquid crystal material, and relates to a fixed frequency scanning leaky-wave antenna, which aims to meet the requirements on the leaky-wave antenna with excellent electric tuning performances and a simple electric control mechanism. According to the fixed frequency scanning leaky-wave antenna, a micro-strip-like line structure is adopted for a leaky-wave antenna main body, and the two ends of the leaky-wave antenna main body are gradually-changed line matching circuits. Interdigitating structures and grounding metal through holes are adopted for a radiation main body, so that needed series capacitor and shunt inductors are realized; and a liquid crystal is filled into a gap between the interdigitating structures. The interdigitating structure located at the outer side is separated from an inner side part by the gap and the gap is used for isolating direct current and bias voltage and is also one part of an interdigitating capacitor. The bias voltage is applied to a shutter island formed by the interdigitating structure at the outer side, and the deflection of liquid crystal molecules located between the interdigitating structures is adjusted by a potential difference formed between the interdigitating structure at the outer side and the interdigitating structure at the inner side, so that relative dielectric constants of the liquid crystal material are controlled; and finally, a wave beam scanning angle of the leaky-wave antenna is controlled. The fixed frequency scanning leaky-wave antenna based on the liquid crystal material is applicable to the field using an electric control scanning antenna.

The invention relates to an intelligent real-time matching system and method of car pooling based on the fitting degree of a driving route. The system comprises car-owner/driver-end smart phones and/or tablet navigation terminals, intelligent passenger-end terminals and a cloud computing management service platform. The method comprises that according to default position or input information, the platform plans car-owner/driver and passenger driving routes intelligently, and car-owner/driver and passenger with high fitting degree are matched intelligently for car pooling via real-time route screen display, voice broadcast, navigation induction and electronic display information interaction. The system provides digital output and printing scheme based on the cost algorithm and cost voucher of the sharing coefficient. The system and method can improve the driving safety, the matching success rate and the vehicle utilization rate, share the cost of the car of the car-owner/driver, reduces the cost of passenger, alleviates traffic jams, and purifies the atmosphere.

The invention discloses a fingerprint identification method by using the joint of lines and points, which relates to a fingerprint identification method by using the joint of lines and points so as to solve the problems that the existing fingerprint identification method using dot matching easily leads to wrong identification, is greatly affected by fake characteristic points and has relatively poor noise immunity, and the fingerprint identification method using line matching has relatively large calculation work and low identification speed. All matching points in a database image Tp and an image Tq to be identified are selected; sorting is carried out to a plurality of obtained matched points according to matching similarity, and N pairs of matching points with the highest matching similarity are selected; K pairs of matched points are selected from the N pairs of matched points to serve as reference points; the difference between the X-axis and Y-axis and a direction angle is obtained to serve as the offset of two images; translation and rotation transformation are carried out to the image Tq; after correction, the ridge lines of the image Tq and the image Tp mutually match; the matched number is recorded; if the length weighted average value of all matched ridge lines meets a threshold value, the image Tp is identified to match with the image Tq; otherwise, the image Tp is identified not to match with the image Tq.

The invention relates to a line matching method based on affine invariant feature and homography. As line matching is lack of an effective geometric constraint of an epipolar line in point matching. A homography constraint is introduced as the geometric constraint of line segment matching to make up the defect that the line segment matching is lack of a strong geometric constraint. The invention additionally discloses a line segment automatic matching method based on the homography constraint. Line segments are transmitted and sleeved among images through the homography constraint, so that the searching difficulty for the line segments of the same name is reduced, and the matching accuracy is improved; the line segments of the same name are backwards searched after primary matching, so that matching errors are removed, and the matching accuracy is further improved. The method achieves the line segment automatic matching for remote-sensing image pairs.

The invention discloses an indoor fingerprint positioning improvement method based on area division and a network topology and belongs to the communication technology field. The method comprises the following steps of S1 determining a sampling layout and a system coordinate system; S2 on a off-line acquisition phase, collecting and receiving a signal intensity indication RSSI value at each sampling point; S3 storing the RSSI value at an acquisition point, a MAC address and a coordinate at the acquisition point, and constructing a Radio Map database; S4 collecting the RSSI value at a position to be positioned, and matching a collected signal intensity value and a signal intensity value in the database; and S5 taking a fingerprint which is matched successfully as a position coordinate of a point to be measured. In the method, an area division strategy and a network topology structure are used to construct a network, fingerprint database information accuracy and on-line matching precision are increased, positioning is stable, and the positioning is performed and simultaneously network system stability is enhanced.

A method for mosaic panoramic images, an intelligent Terminal and a storage medium are disclosed. The method comprises: since the user takes panoramic photographs using a relatively fixed panoramic photographing apparatus, in panoramic shooting, the rotation angle of the camera can be easily obtained or at least roughly measured, and the parameters which can not be directly measured, such as the internal parameters of the camera, can be roughly calibrated on line to obtain the predicted value. Combined with the rotation matrix of the rotation angle of the camera, a global homography matrix which is estimated in advance is constructed. In panoramic image mosaic, the parameters in homography matrix are adjusted by feature point matching pair and feature line matching, and the problem of unsuccessful mosaic caused by the shortage of feature point matching pair is remedied by using line matching pair. The homography matrix of the photographs which occasionally appear without enough featurepoints and feature lines is calculated by using the homography matrix of the photographs adjacent to the photographs to ensure the success of the stitching.

The invention discloses a network medium information release effect simulation method and system. The simulation method comprises the following steps: an off-line matching model module analyzes auction logs and establishes mapping relation between validating network medium information and display request information of triggering and displaying the validating network medium information; a play scene establishment module determines a network medium information set mapped with the display request information offline based on the off-line matching model, then determines release cost information of each network medium information in the network medium information set mapped with the display request information during display simulation in each display rank and saves play scene records; and a release effect simulation module calculates and outputs pre-estimated release effect information of corresponding network medium information according to the network medium information material set submitted by a user and the play scene records. With the network medium information release effect simulation method and system, universality of the network medium information release effect simulation can be improved and processing performance of the system is improved.

Present invention relates to video camera calibrating method only using one plane calibration object. It contains setting two sets quadrature parallel straight lines given that spacing as calibration object, shooting one image along video camera optical axis with plane calibration object oblique, to make two sets parallel lines approximately in vertical and horizontal two direction of image. Extracting intersecting point in image parallel line and proceeding straight line matching to parallel line, finding out one minimal residuum, using intersecting point of two minimal residuum fitting straight line as principal point initial value, finding out percentage distortion initial value according to residuum with relation, using all fitting straight line residuum sum as objective function, utilizing optimization method proceeding optimization to and percentage distortion, utilizing distortion model removing image distortion, finding out each intersecting point orthoscopic image co-ordinate, finding out video camera whole parameter by linear transformation utilizing intersecting point orthoscopic image co-ordinate and world co-ordinate in plane calibration object, finally to complete calibration.

The invention relates to the field of computer graphics, and discloses a linear feature matching method and system. The method comprises the steps of acquiring a digital image; utilizing an SIFI algorithm to carry out feature point extraction and matching on the digital image; Gaussian filtering and eliminating noise; classifying pixels; acquiring a matching line candidate set; calculating an overlap part of a referenced line and a candidate matching line in the matching line candidate set; realizing line matching according to geometrical features and grey information of the line. The applicability of line feature matching is improved, and the requirement on the consistency of matching line attribute is reduced.

The invention provides an image registration method based on parallel line matching. The method comprises the steps that feature points of two adjacent frames of images are obtained with an optimization dimension invariant feature transformation algorithm; the feature points in the two adjacent frames of images are matched with a parallel line method, and feature point matching errors are eliminated; the relative movement of the matched feature points is calculated, and a global movement parameter is obtained. According to the image registration method based on parallel line matching, the feature points of the two adjacent frames of images are obtained with the optimization dimension invariant feature transformation algorithm, and the speed of recognizing a target image is increased; the feature points in the two adjacent frames of images are matched with the parallel line method, the feature point matching errors are eliminated, and thus the accuracy of recognition of the target image is improved.

The invention discloses an oral implantology navigation system based on mixed reality. The system comprises an image processing unit (001), an image acquisition unit (002) and an image matching, positioning and navigation unit (004), wherein the image processing unit (001) is used for carrying out three-dimensional reconstruction on an image acquired before operation; the image acquisition unit (002) is used for acquiring the surface information of a patient operation area in the operation; the image matching, positioning and navigation unit (004) causes a preoperative image processed by the image processing unit (001) to be fused with an image in an intraoperative image collected by the image collection unit (002) in real time, and transmits the fused image to a display unit (005). By useof the system provided by the invention, a surgeon can more clearly and visually know the dissection structure of the implantation position of the patient, the operation can be implanted accurately,operation time is shortened, and an operation success rate is improved.

The invention discloses a line matching method and a line matching system on the basis of a geometrical relationship. The line matching method comprises the following steps of: a step 1 of carrying out line detection on a plurality of images; a step 2 of carrying out projection transformation on lines detected from the same image; a step 3 of obtaining an intersection point of circular arcs formed by the lines detected from the same image on a projection plane; a step 4 of generating a matching feature of the lines detected from the same image; and a step 5 of carrying out line matching by the matching features corresponding to the lines detected from each image. In the method, a fundamental matrix does not need to be obtained in advanced, the influence of the point matching precision on the precision of the line matching is avoided, and the efficiency of a matching algorithm is improved.

The present invention provides a method and apparatus for generating refrigeration in a process operating at sub-ambient temperatures in which the refrigeration is generated by a turboexpander. The turboexpander is coupled to a generator controlled so that its speed is maintained at a setpoint through electromagnetic braking and its power output is maintained at line matching voltage and frequency. The speed control of the generator therefore, also controls the speed of the turboexpander. The setpoint is calculated to be equal to a product of an operational efficiency parameter, U/C_o, and a square root of twice the enthalpy drop in the flow passing through the turboexpander divided by a product of pi and a diameter of an impeller employed within the turboexpander.

The invention discloses an indoor real-time positioning and three-dimensional map construction method based on a single-line laser. A single-line laser range finder is fixed on a rotating apparatus, so that the defects that the single-line laser range finder only can acquire the plane 2D data can be overcome, and the indoor 3D environmental data can be acquired. For the acquired 3D scanning data,the six-degree-of-freedom pose estimation for a laser scanning line can be realized by virtue of an accurate structural map building algorithm and a robust scanning line matching algorithm, so that amovement locus of a sensor can be obtained, and a three-dimensional map of a scanned environment can be constructed according to the laser scanning data. By adopting the indoor real-time positioning and three-dimensional map construction method, an accurate indoor real-time positioning and map construction method can be realized.

The invention provides a micro-strip line matching network for a dual frequency-band RF (radio frequency) amplifier, which is used for a dual-frequency amplifier in the technical field of wireless communication. The matching network comprises a micro-strip TL (transmission line) 1, a micro-strip TL 2 and an OS (open stub). The invention aims at providing the matching network which is used for the RF amplifier and is suitable for wireless communication, so as not only to lead the amplifier to work on any two frequency bands at the same time, but also to improve the linear performance of the amplifier by utilizing the harmonic suppression of the matching network. The main characteristics of the matching network are as follows: by adopting the TL 1, the TL2 and the OS, the matching network has simple structure and small geometric dimension; by adopting the structure of the OS, the matching network can realize the function of harmonic suppression; in addition, by adopting a micro-strip line, the matching network is suitable for high-power application.

The invention discloses an improved car sharing system. The improved car sharing system comprises an information distribution and searching module, a matching system module and a feedback system module, wherein the information distribution and searching module comprises a car sharing route distribution module, a car sharing requirement distribution module and a car sharing route searching module, the matching system module comprises a car sharing route registration invitation module, a supply and demand information check module, a car sharing line matching module and a message notification module, the car sharing route distribution module is used for distributing a driving route of a driver and a driving route required by a passenger, and the car sharing requirement distribution module is used for distributing requirements of the driver for the passenger and requirements of the passenger for the driver and for a car of the driver. The system is advantaged in that the long-distance car sharing information of the driver and of the passenger are integrated in one system, bidirectional selection between the driver and the passenger can be realized, moreover, identity of the driver can be authenticated by the system, car sharing safety is further guaranteed, a feedback mechanism of the system enables the driver and the passenger to realize scoring and evaluation, and the scoring and evaluation information can be taken as important reference advice for car sharing travel.

The invention provides a binocular camera image depth information acquisition method and device. The method includes the first step of carrying out image correction on input data of two target images according to binocular camera calibration information obtained in advance, so that corresponding pixel points on the target images are located on the same horizontal line, the second step of calculating pixel matching energy according to the image correction information, constructing a matching pair directed connection graph according to the pixel point adjacent relationship and setting the weight of each side in the connection graph, the third step of utilizing a graph theory maximum flow algorithm to solve the maximum flow of the connection graph through the adoption of a line matching method, converting the maximum flow into a matching result and caching the matching result, the fourth step of carrying out postprocessing on the cached matching result and obtaining a postprocessing result, and the fifth step of calculating the pixel depth of the target images according to the binocular camera calibration information and the postprocessing result and obtaining the depth information. According to the method, the depth of a binocular camera can be regained and the depth information can be obtained while reasonable hardware expenditure, low power consumption and performance requirements are met.

The invention relates to a fingerprint identification method based on a rotation angle so as to solve the problems that the existing point matching fingerprint identification method is easy to cause misjudgment, is greatly affected by pseudo feature points and has poorer anti-noise capability and the line matching fingerprint identification method has greater computation amount and slow judgment speed. Feature points are divided into two parts according to end points and bifurcation points, feature angles of all the feature points are calculated, wherein the feature angles refer to included angles between connection lines of the feature points and a central point and the forward direction of an X-axis, the differences between the feature angles of all the feature points in a storage template and the feature angles of the feature points in a corresponding annular region of a template to be identified are calculated, the statistics of the numbers of feature points with the same feature angle difference are respectively carried out, and the judgment on whether two images are matched or not is carried out according to the maximum value of the numbers of feature points with the same difference.

The invention provides a readout circuit and a reading method for a three-dimensional memory. The readout circuit comprises a reading reference circuit and a sensitive amplifier, wherein the reading reference circuit is used for producing reading reference current capable of quickly distinguishing reading low-resistance state unit current and reading high-resistance state unit current; the reading reference circuit comprises a reference unit, a bit line matching module, a word line matching module and a transmission gate parasitic parameter matching module. The readout circuit has the advantages that for the parasitic effect and electric leakage of the three-dimensional memory in the plane and vertical directions, the matching of bit line parasite parameters, electric leakage and transmission gate parasitic parameters is introduced into the reading reference current, the matching of current mirror parasitic parameters is introduced into the reading current, the pseudo reading is eliminated, and the readout time is shortened; the application range is wide, and the readout accuracy is high.