43results about How to "Avoid stitching errors" patented technology

The invention belongs to the field of automatic measurement and specifically discloses a complex part pose estimation system and method based on three-dimensional measuring point cloud. The method forestimating a complex part pose comprises a step of calibrating a conversion matrix between a six-degree-of-freedom industrial robot end flange and a grating area array scanner measurement coordinatesystem, a step of driving a grating area array scanner to move through the six-degree-of-freedom industrial robot to scan a measured workpiece and obtaining three-dimensional point cloud data of the measured workpiece, a step of converting the three-dimensional point cloud data of the measured workpiece to a robot base coordinate system to obtain converted three-dimensional point cloud data, and astep of matching the converted three-dimensional point cloud data with a three-dimensional design model of the measured workpiece to obtain the pose of the measured workpiece relative to the robot soas to complete the estimation of the pose of a complex part. The invention has a wide measurement range, the accurate measurement of multiple regions and complete topography of the measured workpiececan be achieved, and the pose of the measured workpiece can be accurately obtained.

The invention relates to the technical field of 3D map, and provides a 3D map modeling surface contour fast linkage rendering method. The method comprises the following steps: (1) acquiring the coordinate information of a building, and building a 3D map model; (2) analyzing the characteristics of a surface mounting area, and determining the space coordinates of shooting points of an unmanned aerial vehicle in batches according to a mathematical reverse deduction model; (3) storing the space coordinates of the shooting points; inputting the space coordinates of the shooting points of the unmanned aerial vehicle to the unmanned aerial vehicle to realize automatic shooting by the unmanned aerial vehicle; and (5) automatically screening a shot image to match the surface mounting area according to the feature point information of the surface mounting area, and performing surface mounting. The beneficial effects are as follows: with the help of 3D map modeling, cloud computing, a mathematical reverse deduction model, an unmanned aerial vehicle and a smart surface mounting technology, efficient linked 3D modeling surface rendering is realized, and the surface texture characteristics of a 3D map are presented truly; the shooting points of an unmanned aerial vehicle are automatically generated in batches, position deviation caused by artificial selection is avoided, the work continuity is improved while the quality of rendered images is guaranteed, and manpower and material resources are saved.

The invention belongs to the field of image automatic inspection and particularly discloses a two-dimensional image splicing method based on optical grating positioning in automatic visual inspection. The splicing method includes the steps of modifying the coordinate values of sub-images in a large image according to the coordinate included angle parameter of a shooting platform and a camera, calculating the position coordinates of four corners of each sub-image, obtaining the size of the large image through the actual physical distances corresponding to all pixels, calculating the pixel gray levels in sub pixel coordinate positions of the sub-images through bilinear interpolations to obtain the spliced large image, conducting modification to eliminate errors caused by inconformity of shooting coordinates through the coordinate included angle parameter of the shooting platform and the camera, and directly conducting calculation through the coordinate positions of the sub-images in the splicing process at the same time. Therefore, splicing errors caused by a splicing method where image features are used for inspect splicing are avoided, meanwhile, sub pixel accuracy is adopted for all the calculated coordinates, and the quality of the spliced image is improved.

The invention discloses a digital X-ray image splicing method and system. The digital X-ray image splicing method comprises steps that a first detector and a second detector are arranged in a radiation vision field scope of a same beamer, plane distances from a bulb focus of the beamer to the first detector and the second detector are identical, an overlapping region X is arranged between the first detector and the second detector with intervals; a digital X-ray shooting system starts for exposure for one time, a first DR image of a focus portion is generated on the first detector, and a second DR image of the focus portion is generated on the second detector; the overlapping region X is cut from the second DR image to acquire a third DR image; the first DR image and the third DR image are spliced to acquire a fourth DR image; gray fusion for the splicing region is carried out to eliminate a splicing seam to acquire an image O; the image O is displayed. The method is advantaged in that the spliced image can be acquired through one-time exposure, and thereby a radiation dose and the patient positioning time can be greatly reduced.

The invention relates to the field of image processing, in particular to a real-time splicing method for unmanned aerial vehicle aerial stereo images. According to the splicing method for the unmanned aerial vehicle aerial stereo images, an inter-frame interval of key aerial stereo images is adjusted and extracted in real time according to the overlapping ratio of adjacent to-be-spliced aerial stereo images; a transformation matrix of every two adjacent frames is obtained according to a matching relation between homonymy points of every two adjacent frames, and the serial aerial stereo images are transformed to a coordinate system of reference images; and reference frames are adjusted in real time according to set reference frame adjustment judgment conditions, so that accumulative errors generated in the process that the aerial stereo images are transformed to a coordinate system of the reference frames are dispersed to all frames of images, and the situation that serious distortion of subsequent images is caused by error accumulation is avoided.

The invention discloses a method for laser detection of a screw rotor end sectional shape, and relates to detection of screw rotors. The measurement advantages of high precision, non-contact type and long service life of a laser displacement sensor are utilized, and the laser displacement sensor moves along the rotor theoretical end sectional shape to keep equidistance measurement. A kinematic relation between a screw rotor rotating coordinate system and a coordinate system where a movable platform of the laser displacement sensor is located is established, a normal vector of each data point of the rotor end sectional shape is calculated, by the rotation of the screw rotors, the interference phenomenon that a measured point is sheltered by other contours in the measurement process is avoided, and the problem that the included angle between the normal vector of the measured point and the laser emergent direction exceeds the angle range, which can be accurately measured, of the laser displacement sensor is solved. The detection accuracy can be effectively improved, the high-precision detection of the screw rotor end sectional shape is obtained, and the method is also applied to measurement of end sectional shapes of the screw rotors with wide helicoids.

The invention relates to a method for manufacturing an optical micro-nano pattern on the surface of a lithium niobate film, which belongs to the technical field of micro-nano processing. The method comprises the following steps: manufacturing a layout required by electron beam exposure; cleaning and drying a lithium niobate substrate; sputtering a metal conductive layer on the lithium niobate substrate; spin-coating the lithium niobate substrate with electron beam glue; carrying out first electron beam exposure on the lithium niobate substrate to manufacture a mark; carrying out developing andfixing; carrying out magnetron sputtering of metal on the lithium niobate substrate to manufacture a metal mark; removing the photoresist and stripping a metal-masked pattern to prepare a lithium niobate sheet with a metal bulge mark; spin-coating the lithium niobate sheet with electron beam glue; carrying out second electron beam exposure on the lithium niobate sheet to manufacture a pattern; carrying out developing and fixing; and carrying out pattern transfer to form a micro-nano structure. By means of the method, a pattern with a steep side wall can be manufactured on a non-conductive lithium niobate material, a micro-nano pattern with the size smaller than 900nm can be manufactured, the manufactured optical waveguide is large in refractive index contrast ratio, the size of an opticaldevice can be reduced, and the performance of the optical device can be improved.

The invention provides a stepping splicing type 3D printing system and a printing method. The system comprises a control system and a 3D printer, wherein the control system is in communication connection with the 3D printer, the 3D printer comprises a fixing platform, a lens fixing column and a printing mechanism, the lens fixing column and the printing mechanism are arranged at the upper end of the fixing platform, the lens fixing column is provided with a photoetching lens corresponding to the printing mechanism in position, an XY-axis movement platform is arranged between the printing mechanism and the fixing platform, and the XY-axis movement platform comprises an X-axis movement mechanism and a Y-axis movement mechanism. The XY-axis movement platform is arranged, so that high printingprecision can be guaranteed, meanwhile, the printing breadth can be increased in a stepping splicing mode, and the splicing error in the splicing process can be effectively avoided.

The invention discloses a data insertion method and apparatus. The method comprises the steps of obtaining a mapping script, and through the mapping script, obtaining field types corresponding to field names; then according to the field types corresponding to the field names, obtaining attributes of classes; according to the attributes of the classes, generating a JavaBean component; according tofield values corresponding to the field names and the JavaBean component, generating a to-be-inserted data object; through calling a character string generation method, converting the to-be-inserted data object to a json character string; and inserting the json character string into a database. Through the scheme disclosed by the method, data can be inserted in ElasticSearch; the method avoids splicing of the field names and the field values, so that the problem of splicing errors is avoided; and compared with the prior art, the data insertion accuracy is improved.

The invention relates to a system for realizing real-time multi-scale imaging by using camera tiling. The system includes a camera array, an image processing and storage system and a display, wherein the image processing and storage system processes images acquired by the camera array and sends the processed images to the display. The system is characterized in that the camera array is composed of a plurality of mutually-staggered micro cameras; and the resolution of micro fields of view shot by the micro cameras is higher than the resolution of the display field of view of the display.

An embodiment of the invention provides a screen metal frame assembly and a liquid crystal display device, relates to the field of display screen assembling and solves the problem of splicing errors of a screen metal frame. The screen metal frame assembly comprises a first frame and a second frame, wherein a first splicing surface formed at one end of the first frame is correspondingly attached to a second splicing surface formed at one end of the second frame; an elastic piece is arranged at one end, close to the first splicing surface, of the inner wall bottom surface of the first frame; one end of the elastic piece is attached to the inner wall bottom surface of the first frame; the other end of the elastic piece is connected with the inner wall bottom surface of the second frame. The screen metal frame assembly and the liquid crystal display device are applied to metal frame splicing of the liquid crystal display screen.

The invention provides a photoetching splicing error detection method, a two-dimensional grating manufacturing method and a mask plate. The photoetching splicing error detection method comprises the following steps: forming a photoresist layer on a substrate; a mask plate is used for executing exposure and development processes to form a graphical photoresist layer, the mask plate comprises a first repeated exposure area and a second repeated exposure area, and the first repeated exposure area and the second repeated exposure area are located on the edge of the exposure area of the mask plate. The grating pattern on the first repeated exposure area and the grating pattern on the second repeated exposure area are complementary, and the first repeated exposure area and the second repeated exposure area of adjacent exposure fields are overlapped during exposure; and detecting splicing errors of the patterned photoresist layers formed in the first repeated exposure region and the second repeated exposure region of the adjacent exposure fields by utilizing defect scanning equipment. According to the splicing error detection result, the position, direction and size of the splicing error of the two-dimensional grating can be determined, process correction is carried out, and the splicing error of the two-dimensional grating is avoided.

The invention provides film-free computer direct plate making equipment and a making method. The equipment comprises an exposure light source, a print image imaging device and a printing plate carrying device, which are arranged coaxially; the exposure light source is used for irradiating light to cure a photosensitive material loaded on a printing plate; the print image imaging device is used for forming a target image to replace a film, and the target image masks the light from the exposure light source so that a corresponding exposure image is formed on the printing plate; and in order to improve the exposure efficiency and the plate making efficiency, the print image imaging device is provided with a light guide layer for trimming non-uniform exposure light to uniform parallel light. Meanwhile, a plate making process formed by the plate making equipment can adapt to the plate making requirements of high precision and low cost.

The invention discloses an automatic laser cutting method used for a medical long solenoid. The method includes the steps that after to-be-machined length L data of the medical long solenoid are input into a control system, and the medical long solenoid is accurately clamped, the position at the moment is recorded as the initial position O by the control system; the retreating distance D of a precise rotary two-dimensional platform is compared with the to-be-machined length L, and the precise rotary two-dimensional platform retreats and pushes laser cutting heads many times for synchronous cutting to form cut spiral lines. The control system is adopted for controlling and accurately repeating operations, low efficiency is improved, and large splicing errors are avoided.