6results about How to "Reduce Stitching Errors" patented technology

The invention provides an image splicing method and system based on priori knowledge and a spanning tree. The method comprises the following steps: obtaining a plurality of pathological section images to be spliced shot by a digital pathological scanner; taking the grid position and the coverage area of the image as priori knowledge; aligning adjacent pathological section images by using an enhanced phase correlation algorithm according to the priori knowledge; discarding low-quality adjacent image alignment by using a normalized cross-correlation algorithm so as to segment the aligned complete image into a plurality of disconnected image blocks; a spanning tree process is executed in each image block, after a spanning tree corresponding to each image block is obtained according to a result of the spanning tree, multiple spanning trees are spliced, and a complete pathological section image is obtained according to a splicing result; the method has the advantages that the splicing error is small under the condition that the processing speed is high, and the influence of micro rotation of the camera on the image position can be effectively dealt with.

The utility model relates to the technical field of flexible screen installation, and discloses a soft module structure which comprises a panel, a positioning assembly is arranged on the side wall of the panel, and a reinforcing assembly is arranged on the side wall of the panel. The positioning assembly comprises a first positioning strip, the first positioning strip is fixedly connected to the side wall of the panel through welding, a second positioning strip fixed through welding is arranged on the side wall of the panel, a third positioning strip fixed through welding is arranged on the side wall of the panel, and the reinforcing assembly comprises a first reinforcing rod. The first reinforcing rod is fixedly connected to the side wall of the panel in a welded mode. According to the utility model, the panel is welded and fixed with the positioning strip I, the positioning strip II and the positioning strip III, the structural stability is enhanced by welding the reinforcing rod I and the reinforcing rod II, and the forming connecting plate is cut after forming, so that the module crossing structure of the soft module is completed, and the splicing seam error of bracket manufacturing and screen mounting is reduced; through the structure, inner arc, outer arc and circular structures are met, and high-precision splicing is achieved.

The application relates to the technical field of precision casting and discloses a casting process for a multiple-assembly high-temperature alloy turbine guide vane for an aero-engine, which comprises the following steps: S1, preparing a vane mold according to the structure of the multiple-assembly high-temperature alloy turbine guide vane; S2, pressing a multiple-assembly high-temperature alloy turbine guide vane wax mold: using the vane mold in step S1 and selecting wax material, a vane wax mold 8 is pressed by adopting an injection molding mode; S3, bonding a mold group: bonding two vane wax molds 8 prepared in step S2 and a pouring system together to form a mold group; S4, preparing an oxide ceramic mold shell, after the mold shell is air-dried, a dewaxing treatment is carried out; S5, pre-burning the oxide ceramic mold shell; and S6, pouring alloy liquid. The multiple-assembly turbine guide vane casting produced through the improvement of the vane wax mold preparation bonding scheme, the oxide ceramic mold preparation process and the pouring process meets the index requirements in terms of grain size, metallurgy and size control, and the production is stable.

The utility model belongs to the technical field of urban furniture and landscape greening, and discloses a modularized tree grate with a tenon-and-mortise structure, which comprises an inner ring tree grate, a middle tree grate in tenon-and-mortise connection with the inner ring tree grate and an outer ring tree grate in tenon-and-mortise connection with the middle tree grate, and the outer ring tree grate is in contact with the end face of a floor tile. The tree grate module disclosed by the utility model is convenient to construct and implement on site, can quickly meet the setting requirements of different places, is simple to assemble, saves time, can reduce the seam splicing error, and accelerates the construction progress.

The present application belongs to the technical field of pipeline detection, and discloses a pipeline self-calibration twin modeling method and related equipment. A positioning feature pattern is projected on the inner wall of the pipeline to be detected, and a pan-tilt camera is used to identify the positioning feature pattern to generate key feature points that are added to local point cloud data. The key feature points are used as reference points when splicing local point cloud data, thereby reducing splicing errors and effectively improving the accuracy of modeling results.

The embodiment of the invention provides a point cloud splicing method and device, electronic equipment and a storage medium, and relates to a point cloud splicing technology, and the method comprises the steps: obtaining a first to-be-spliced point cloud and a second to-be-spliced point cloud, and carrying out the preprocessing of the first to-be-spliced point cloud and the second to-be-spliced point cloud, obtaining a first target to-be-spliced point cloud and a second target to-be-spliced point cloud, calculating a first intersection and a second intersection of the first target to-be-spliced point cloud and the second target to-be-spliced point cloud, calculating a conversion matrix of the first intersection and the second intersection until a preset condition is met, and obtaining a target conversion matrix; and splicing the first target to-be-spliced point cloud and the to-be-spliced point cloud based on the target conversion matrix. The intersection between the two point clouds is calculated through continuous iteration, the operation time of the ICP algorithm can be shortened through the intersection, and the problem that ICP registration falls into local optimum is effectively solved. In addition, by means of the registration mode, splicing errors caused by hand-eye calibration can be reduced.