127 results about "Coordinate projection" patented technology

This invention provides a rapid geological coordinates project conversion method applied in the guide system, which comprises GPS signal receiving module, guide soft and hard wares system, electrical map, position information process and error correction module though which can rapidly match the position information of the moving object into the displays of the guide system. Comparing with the old conversion method, this invention lowers the guide data collection cost and has a good compatibility and can convert the moving object position information into various forms of the electrical maps.

The invention discloses a depth-auto-encoder-based human eye detection and positioning method. The method comprises: for all images with calibrated human eye rectangular frame positions in a training set, binary label graphs are generated by using the calibrated human eye rectangular frame positions; small image blocks are selected randomly from the images in the training set and a plurality of auto-encoders are training with supervision in a layered mode to construct a depth auto-encoder, and the depth auto-encoder is initialized based on weights of all layers of the auto-encoder; small original image blocks and small label image blocks are selected randomly at same positions of the original images and the label graphs, wherein the small label image blocks are used as supervision information and the small original image blocks are used as inputs to optimize the depth auto-encoder; and a plurality of small to-be-measured image blocks are generated at a to-be-measured image in a window sliding mode, small to-be-measured label image blocks of all small to-be-measured image blocks are obtained by using the depth auto-encoder and are combined to obtain a to-be-measured label graph of the to-be-measured image, and binaryzation is carried out on the to-be-measured label graph and a position of a human eye is obtained based on coordinate projection or contour searching.

The invention discloses a method for automatically adjusting the image projected by a projector. The method comprises the following steps: setting a recognizable imaging mark on a screen; extracting a preset front sight image through a menu; photographing images of the screen by a camera to recognize the positions of the mark and the preset front sight on the screen; determining whether the projected images of the mark and the preset front sight are superposed; calculating the relative coordinates of the preset front sight projected image and the mark; and adjusting the position of the projector. The invention also discloses a device for realizing the above adjustment method. The device comprises a projection module, the screen, the preset front sight, the camera, an image recognition processing module and a projector position adjusting module, wherein the camera is located on the projection module and is sequentially connected with the image recognition processing module and the projector position adjusting module. The method and the device can achieve full-automatic adjustment of trapeziform distortion of the images projected by the projector so as to save the fine adjustment time of users.

The invention provides a people counting method based on video image processing. The people counting method comprises the following steps of: 1, acquiring a video stream image of a monitoring region; 2, acquiring pedestrian targets through a frame difference method, and performing math mathematical morphology operation processing on a frame difference result to obtain a pedestrian moving region; 3, partitioning the pedestrian moving region at least one time by a coordinate projection partitioning method to obtain a plurality of sub regions; 4, searching and matching the sub regions of adjacent frames according to central point distances of the sub regions and gray information distribution features; and 5, instantly updating central point position information of the sub regions, storing the information into a storage device to obtain a people counting result by calculating trace information of central points of the sub regions in the monitoring region. By the method, the efficiency and the accuracy for counting people in a public region can be effectively improved in real time.

The invention provides a radar netting target state and system error joint estimation algorithm. The algorithm comprises the following steps: according to an airborne radar measurement principle, in combination of a geographical position and an attitude angle of an airborne platform, a measurement mathematical model for each airborne radar with system errors, measurement noise and the target state included is constructed; according to the target motion state, in joint of the system errors of each airborne radar, a target motion state mathematical model after dimension expansion with process noise included at each moment is constructed; and according to the constructed mathematical models in the former two steps, initial values of the measurement noise, the process noise, the target motion state after dimension expansion and an estimation error covariance matrix are set, a CKF filter method is applied, and real-time and synchronous estimation on the target motion state and the system errors of each airborne radar is realized. Problems that data deformation exists in the traditional coordinate projection-based two-dimensional planar system error registration algorithm, errors of a pitch system can not be estimated and the traditional method is not suitable for long-distance system error registration can be solved.

The invention discloses a machining method of a spatial angle small hole of an aviation component. The machining method adopts a five-axis high-speed electric spark machine tool for machining, adoptsa coordinate projection method for coordinate conversion of the spatial angle small hole size in the machining process, converts the coordinate conversion into a machining instruction that is operableon the five-axis high-speed electric spark machine tool, and finishes machining of the final size and angle. According to the machining method of a spatial angle small hole of an aviation component,coordinate projection and single-dimension coordinate conversion are achieved through a method for making plane and straight line related to the spatial angle small hole axis in a rectangular coordinate system, and the method calculates included angles or distances between planes or between a line and a plane or between lines; the calculation method is simple, and only rotation of a working turntable and translation in X and Y directions need to be matched in actual operation; complex calculation processes and machining processes are avoided; machining quality stability is obviously improved,and machining time is effectively shortened; and machining efficiency of the spatial angle small hole of the aviation component is improved.

The invention relates to the technical field of education and teaching, and provides a geometrical stereoscopic graph projection device and projection method. The projection method comprises the following steps that a two-dimensional plane graph is obtained; whether the two-dimensional plane graph is a geometrical stereoscopic graph or not is judged, if so, one point in a located interface of the two-dimensional plane graph is selected to be used as the original point of a two-dimensional coordinate system, and a boundary point coordinate of the two-dimensional plane graph is measured according to the original point of the two-dimensional coordinate system; the boundary point coordinate of the two-dimensional plane graph is subjected to coordinate transformation, and the three-dimensional coordinate of a boundary point is obtained; a three-dimensional stereoscopic graph is obtained according to the three-dimensional coordinate projection of the boundary point. The simple geometrical stereoscopic graph is subjected to graph analysis, processing and conversion, the stereoscopic graph with the three-dimensional effect is projected, the interactive competence of teaching is improved, the stereoscopic graph can finally help students to understand the three-dimensional stereoscopic graph, and the space imagining ability of students is improved.

The invention discloses a geographical coordinate projection transformation method. The method comprises the steps of extracting the coordinates of a vertex of a transformation area, calculating the coordinates of a homonymy point of the vertex under a target projected coordinate system, setting up a projection transformation linear system of equations, and calculating the coordinates of elements in the projection transformation area under the target projected coordinate system according to the projection transformation linear system of equations. Meridians and latitude lines in a small local area are represented through straight lines respectively, spherical surface calculation is converted to planar calculation, the calculating speed of geographical coordinate projection transformation can be increased, error control can be achieved by controlling the size of the local area, and the requirements of actual application can be met with little cost, wherein the actual application relates to mass data transformation, and the requirements for transformation precision and transformation speed are high.

A method for adjusting image acquisition parameters to optimize object extraction is disclosed, which is applied to an object characterized by forming a specific cluster in a color coordinate space after performing a coordinate projection, and thus the specific cluster contributes to a specific color model, such as a human skin color model. This method first locates a target object within a search window in a selected image. Then applies the specific color model to obtain the image acquisition parameter(s) according to the color distribution and features of the target object. Therefore, the image is transformed according to the adjusted image acquisition parameter(s). Consequently, a complete and clear target object can be extracted from the transformed image by applying the specific color model, and the follow-up images having the same image acquisition conditions with the aforesaid image can also be transformed according to the same image acquisition parameter(s).

The invention provides an unmanned aerial vehicle path (UAV) planning method and device. According to the method, a topological network is constructed by taking ground base stations as nodes, a three-dimensional coordinate system is established by interaction between an UAV and the topological network, and ground coordinates of all nodes in the coordinate system and a coordinate projection of a flight path of the UAV on the ground are known. The method comprises determining a ground node access sequence according to the coordinates of the ground nodes or the number of neighbor nodes of the ground nodes; and searching path points in an effective transmission area of the ground nodes through a convex optimization method, and connecting given starting and terminal points and all the path points found in the path point searching step according to the access sequence to obtain an optimal path. The method can solve the problem that time minimization and path change influence each other in the prior art, the path of the UAV is optimized, the total task time is reduced to the greatest extent, and data collection and distribution between the UAV and the ground nodes are more efficient.

The invention relates to an infrared spectrum-based crude oil type identification method, which comprises: determining the mid-infrared spectrums and the near-infrared spectrums of various types of crude oil samples, carrying out second-order differential treatment, taking the polar coordinate projection scores of the absorbance of each crude oil sample at five spectrum areas such as W1 of 1650-1800 cm<-1>, W2 of 4000-4500 cm<-1>, W3 of 4500-5000 cm<-1>, W4 of 5000-5500 cm<-1> and W5 of 5500-6000 cm<-1> on the X-axis and Y-axis, establishing a crude oil spectrum identification database throughthe polar coordinate projection scores, determining the polar coordinate projection scores of the absorbance of crude oil to be identified at the five spectrum areas on the X-axis and Y-axis, calculating the distances between the identification vector of the crude oil to be identified and each crude oil sample vector, and comparing the minimum distance to a set threshold, wherein the corresponding crude oil and the crude oil to be identified are the same type of the crude oil if the minimum distance is less than the threshold, and if the minimum distance is not less than the set threshold, the same crude oil as the crude oil to be identified does not exist in the crude oil spectrum database. With the method of the present invention, the crude oil sample identification speed and the crudeoil sample identification accuracy can be effectively improved.

The invention discloses a three-dimensional model projecting method for imitating lens distortion. The method comprises steps as follows: projecting the three-dimensional model onto an image plane according to a pin-hole imaging model, and obtaining an image coordinates (u, v) under an image coordinate system; obtaining a transformation relation of the image coordinates and computing a normalized image coordinates (x, y) under a camera coordinate system corresponding to the image coordinates (u, v) according to the transformation relation; and computing the distorted normalized image coordinates according to the normalized image coordinates (x, y) and projecting the distorted normalized image coordinates to the image plane, and overlaying the three-dimensional model by the distorted image coordinates on a real two-dimension image after the three-dimension model is protected on the image coordinates. The invention matches the three-dimension model and a real scene, so as to realize a more real and natural false-real combination.

A computer-implemented method of localizing an image of a person captured using a camera is provided, the person in the field of view of a camera, comprising: obtaining the image captured using a camera, the image comprising the person within a bounding box; determining at least one slant value associated with the person within the bounding box; determining head image coordinates and feet image coordinates for the person using the at least one slant value; and localizing the person by projecting the head image coordinates to a head plane and the feet image coordinates for the person to a ground plane.

The invention discloses a method for accurately calculating morphology change of a gully head and a gully wall of a gully with a washing hole. The method comprises the following steps of: firstly, importing the determined gully terrain grid data into GIS (Geographic Information System) software and setting a coordinate projection system; secondly, cutting the terrain data of the gully into three parts according to a water collecting area, a gully wall and a gully bed boundary; importing terrain data of the gully wall into a file which can execute data operation and respectively rotating spatial coordinates around a Z axis and an X axis according to the certain angle; secondarily importing the rotated gully wall data into the GIS software and extracting a boundary point position of the gully wall in a GIS software environment to generate a face file; then generating TIN (Triangulated Irregular Network) by using the rotated space point position and the boundary file; converting the TIN into a DEM (Digital Elevation Model) with proper size of grids; and subtracting the DEMs at different stages to finally obtain the terrain change processes of different stages. The method disclosed by the invention can be used for generating the DEM accurately and quickly, is simple in operation and does not need complex three-dimensional space conversion operation.

The invention relates to a method for predicting the properties of crude oil through infrared spectrum. The method comprises: collecting a group of crude oil samples with the number of at least 200; determining the property data of the crude oil samples by using a conventional method; determining the near infrared spectrums and the mid-infrared spectrums of the crude oil samples; taking the absorbance at five spectrum areas such as W1 of 1650-1800 cm<-1>, W2 of 4000-4500 cm<-1>, W3 of 4500-5000 cm<-1>, W4 of 5000-5500 cm<-1> and W5 of 5500-6000 cm<-1>, and calculating the polar coordinate projection scores; establishing a crude oil spectrum fitting database; calculating the polar coordinate projection score vectors of the absorbance of the crude oil samples to be determined at the characteristic spectrum area; fitting the polar coordinate projection score vectors and the spectrum polar coordinate projection score of the crude oil database sample to obtain a fitting degree; and predicting the crude oil sample to be determined through the properties of the database samples participating the fitting if the fitting degree is below a set threshold.

The invention provides an SLAM method and system based on a binocular event camera, and the method comprises the steps of carrying out the motion compensation of inputted left and right event camera data through IMU assistance, and obtaining a corresponding reconstructed image; using the IMU for assisting in motion compensation, projecting coordinates of an event point into a reference coordinatesystem through a relative pose obtained through IMU integration, and replacing the depth of the event point with the median of the depth of an adjacent three-dimensional space point; respectively carrying out feature point detection and tracking on corresponding reconstructed images input by the left and right event cameras; performing triangulation calculation on the detected and tracked featurepoints to obtain three-dimensional coordinate points of the corresponding target and pose changes between the images, and calculating a camera pose by using a PnP method; and performing back-end BA optimization in combination with IMU pre-integration to obtain a camera motion track and scene mapping information. The technical scheme of the invention can cope with scenes with large illumination change and high-speed motion, and can be used for solving the problem that the robot is easy to fail when moving or the environment is too complex in the existing SLAM system.

The invention discloses a geosynchronous orbit satellite microwave image resolution improving method and relates to the field of microwave remote sensing. The method includes the following steps that satellite microwave remote sensing system parameters are determined; target area parameters are set; measured data of earth observation of a geosynchronous orbit satellite is obtained through sampling, and a whole microwave remote sensing image is obtained through resampling; a microwave remote sensing image is processed by using a projection ball method, and image information errors caused by earth curvature in a sampling process are removed; wiener filtering is conducted on the image obtained after coordinate projection, and image space resolution is improved; the image subjected to wiener filtering is subjected to inverse fourier transformation and coordinate transformation, and the image with improved resolution is obtained. By means of the method, the geosynchronous orbit satellite microwave image with higher resolution can be obtained, the method is especially suitable for detecting images large in span and away from a subpoint area, efficiency is higher, and the method has better adaptation and compatibility.