51results about How to "Fast drawing" patented technology

The invention discloses a 3D scene generation method based on a depth video. The method comprises the following steps that S1, data of the depth video and a color video are collected by using a depth camera, and filtering out is performed; S2, the depth video on which filtering out is performed is converted into three-dimensional point cloud data by combining a plane coordinate and a depth value, and then a scene model is built according to the three-dimensional point cloud data; S3, the color corresponding to each point in the three-dimensional point cloud data is obtained from color video data on which filtering out is performed and the color is applied to the scene model so as to obtain a color scene model; S4, the format of data of the color scene model are converted into the 3D file format, and converted files are 3D scene files. The scene generated through the method is verisimilar and natural, modeling is convenient and efficient, calculation amount and memory space are small during drawing, and the method is more suitable for real-time modeling and drawing.

The invention relates to a method for compressing and displaying a picture including transparent information, which can be used for well solving the problems of larger occupation space and slower drawing speed in the prior art, wherein a special decoding library and a special drawing library are established on terminal equipment firstly; then, an original picture of the picture including transparent information is compressed, stored and displayed on the terminal equipment by the following steps of: step 1, reading the original picture and decoding the original picture by the terminal equipment; step 2, newly establishing a corresponding target picture; step 3, reading alpha channel values to form an alpha channel value list; step 4, storing colour data; step 5, inputting auxiliary information of the original picture in the target picture; step 6, storing; and step 7, transferring the special decoding library and the special drawing library to display the target picture. By means of the invention, the picture including transparent information can be converted into a picture having small storage occupation space and rapid drawing speed so as to be compressed, stored and displayed.

The invention relates to a method for real-time shadow driven by field of view. In a three-dimensional virtual environment, the method adopts the following steps: firstly, the field of view is projected to the plane of a light source to generate a projection area, and generate a two-dimensional AABB bounding box for the projection area; secondly, a shadowgraph is generated, and the range of coverage of the shadowgraph is only within the AABB bounding box; and thirdly, the shadowgraph is mapped into a scene to generate shadow. The invention has the advantages that unnecessary shadow drawing in the scene is avoided, the utilization factor of the shadowgraph is increased, and the anti-aliasing effect is very good; in addition, only one to two shadowgraphs need to be drawn, and the real-time property is very high, thereby meeting the requirement of real-time shadow drawing in a large-scale scene with millions of patches.

The invention provides a virtual view generating method based on shielding region detection. The virtual view generating method comprises the following steps of performing edge detection on a left view and a right view of a left reference viewpoint and a right reference viewpoint and extracting edge information; respectively dividing pixel sections of the left view and the right view according to the edge information and performing matching on the pixel sections; checking matching results of the pixel sections so as to perform secondary matching according to the shielding situation and detecting shielding regions of the left view and the right view; generating a virtual view according to the matching result of the pixel sections and detection results of the shielding regions. The virtual view generating method can fully utilize information of two reference viewpoints and avoid large-area void rendering. In addition, calculation redundancy can be further decreased and the calculation efficiency can be improved by adopting the method. Furthermore, virtual view rendering is achieved based on a shielding region and non-shielding region local change method without pixel calculation according to parallax values, and accordingly the drawing speed can be improved.

The invention provides a virtual view rendering method which comprises the following steps of: (S1) according to a first view and a second view at a first reference viewpoint and a second reference viewpoint, respectively calculating a first disparity map of the first view relative to the second view and a second disparity map of the second view relative to the first view; (S2) according to the first view and the first disparity map as well as the second view and the second disparity map, rendering a virtual view, and respectively establishing a first index map and a second index map of the virtual view, corresponding to the first disparity and the second disparity; (S3) detecting a hole with the area exceeding a first threshold in the virtual view, determining the corresponding regions of the hole in the first view and the second view according to the first index map and the second map, and taking values in the corresponding regions to fill the hole; and (S4) filling the rest holes in the virtual view. Image processing traces are not obvious by using the method, and the reality of the virtual view is strong.

The invention discloses a three-dimensional vision simulation system for aerial vehicles. The system comprises a human-machine interactive module, a model configuration module, a collision detection module, a vision display module, a communication module, a data storage module and a three-dimensional scene roaming module; simulative operations of a user are processed in parallel; specifically, a human-machine interface is developed via a MFC (Microsoft foundation class) library; pure numbers, numerical curves and three-dimension animations are simulated separately via ProEssential and OpenGL; the communication module uses UDP communication and serial port communication techniques; the collision detection module uses an image-based collision detection optimization algorithm; thus, the whole system meets the basic simulation needs of the user.

Ball grinding mill bearing bush lubricating oil and a manufacturing method thereof solve the problem that a ball grinding mill bearing bush is poor in lubrication in the severe environment. The ball grinding mill bearing bush lubricating oil is formed by using synthetic oil as base oil and refining multiple added efficient composite additives, has the advantages of being abrasion-resisting, high-temperature-resisting, oxidation-resisting, firm in formed film and the like, and can repair wire drawing and reduce abrasion and bearing bush temperature at fastest speed. The work efficiency and the product quality are improved obviously, the repair and maintenance costs are reduced, the service life of a device is prolonged, and energy consumption is reduced greatly. The ball grinding mill bearing bush lubricating oil is composed of, by mass, mineral lubricating oil 49%-69%, polyester synthetic oil 20%-40%, thickening agent 0.05%-0.15%, organic molybdenum composite additive 2.5%-4.5%, T306 additive 1%-3%, T202 antioxygen 0.4%-0.6%, T551 metal deactivator 0.7%-0.9% and T704 antirust additive 0.6%-0.8%, wherein the summation of the components is a hundred percent.

The invention discloses a ship pipeline support and hanger rapid statistics and plotting method based on a three-dimensional model, wherein the method comprises the following steps: building a pipeline support and hanger model, and enabling installation information parameters of pipeline supports and hangers to be matched in the three-dimensional model; laying the pipeline support and hanger model, wherein the pipeline supports and hangers need to be classified and laid under the corresponding assembly nodes according to statistics and plotting requirements; numbering the pipeline support andhanger model, and writing numbering information into model attributes; exporting pipeline support and hanger statistical information: performing projection transformation on the pipeline support and hanger model, establishing a mapping relationship between different view angle projection drawings of the pipeline supports and the corresponding simplified symbols, and transforming the projection drawings of the pipeline support and hanger model into the corresponding pipeline support and hanger simplified symbols; and quickly labeling a pipeline support and hanger installation drawing. The method has the beneficial effects that automatic statistics of the specifications and the number of the pipeline supports and hangers is achieved, rapid plotting of the pipeline support and hanger installation drawing is achieved according to the plotting requirements of the pipeline supports and hangers, and the design quality and efficiency of a pipeline system are greatly improved.

The invention discloses a drawing board, which is capable of ensuring drawing quality and has higher drawing efficiency. The drawing board disclosed by the invention comprises a board, a transverse ruler and a straight scale; the transverse ruler is positioned on the board and in sliding fit with the board; a sliding groove is arranged on the transverse ruler; idler wheels are arranged at two ends below the transverse ruler; the idler wheels are in sliding fit with two lateral edges of the board; a sliding ruler is positioned on the transverse ruler; a sliding block below the sliding ruler is embedded in the sliding groove and in sliding fit with the sliding groove; a vertical ruler is positioned below a connection plate and articulated with the connection plate into a whole; two bolts are arranged below the connection plate; the bolts and two bolt holes on the sliding ruler are in corresponding insertion fit; and all of the straight scale, the transverse ruler and the sliding ruler are provided with scales and scale values. According to the drawing board disclosed by the invention, the transverse ruler always can vertically slide and be located on the board in a horizontal state; the vertical ruler can transversely slide to draw through the sliding ruler; in the need of drawing an inclined line, the vertical ruler is only necessary to rotate to a required position; the drawing board is simple to operate in the drawing process; the drawing speed is rapid; and the drawing quality is also high.

The invention provides a plotter for mathematic teaching, and relates to a spiral line drawing device. A transverse slide way arranged longitudinally is arranged in the center of the upper side of a base. A movable frame is vertically disposed on the base. The lower edge of a convex edge of the movable frame is connected with a rack below the base. The vertical edge of a triangular support is supported on the rear side of the movable frame. The lower end of a lead angle guide rod is hinged to the right-angle position of the movable frame. The upper end of the lead angle guide rod is fixed to an arc-shaped through groove through a lead angle adjusting bolt. A longitudinal slide way which is through in the forward-backward direction is arranged on the lead angle guide rod, and a line drawing pen is matched with the slide way. A slider is arranged on the portion, on the rear side of the line drawing pen, on the base. A vertical slide groove is formed in the vertical edge of the triangular support, and the slider is matched with the vertical slide groove in a sliding mode. A motor is fixed below the base, a gear is installed on a motor rotary shaft, and the gear is engaged with the rack. The plotter solves the problems that spiral graphs in mathematic teaching are not standard, students can not participate in the circular helix drawing process, and the teaching effect is not ideal.

The invention discloses a machining error statistical analysis device. The device selects sample capacity, adopts a displacement sensor and a high-precision digital caliper to measure the original sizes of all samples, and develops a data processing system through an analog quantity input module and software to realize data acquisition, processing and drawing of a distribution diagram. The devicejudges the machining error property, determines the process capability and the grade thereof, estimates he qualified rate and the unqualified rate, and draws a point diagram. Upper and lower control boundary lines and two limit dimension lines in the point diagram can be used as reference boundaries for controlling unqualified products. Finally, related items are printed through a printer. The device has the beneficial effects of accurate data measurement, high calculation result precision and high curve drawing speed. The statistical analysis efficiency of the machining error can be greatly improved. The intelligent test of the statistical analysis of the machining error is realized.

The invention provides a drawing method of an indoor plan diagram, comprising the following steps: S1, a point is selected as a first pole in the indoor, and a first pole coordinate system is established; 2, selecte a point in that room as a reference point and taking the reference point as an origin to establish a rectangular coordinate system, wherein the first polar coordinate system and the rectangular coordinate system are in the same horizontal plane; This method of drawing interior plans does not require a person to measure the dimensions of every part of the room, Also does not need the designer to draw the indoor floor plan according to the measured size, only needs to select the suitable position to collect the coordinate data of the indoor outline, will automatically draw the indoor floor plan, the size is accurate, the drawing speed is fast, reduced the workload of drawing the floor plan.

The invention provides a large-scale three-dimensional forest drawing method. The large-scale three-dimensional forest drawing method comprises the steps of S1, reading ground elevation data of a three-dimensional forest drawing area and constructing a digital ground model; s2, separating a forest region from the digital ground model and rendering the forest region by utilizing grassland noise texture; s3, setting a forest density random distribution function and generating a tree distribution point information graph in the forest area; s4, setting tree basic mode information for each tree distribution point; s5, obtaining tree comprehensive mode information according to the ground elevation data, the tree distribution point information and the tree basic mode information; s6, according tothe tree comprehensive mode information, achieving close-range tree texture display at different visual angles; and S7, achieving explicit and implicit display of the forest along with the change ofthe observation distance by utilizing a multi-detail-level technical method. According to the method, the large-scale three-dimensional forest can be rapidly drawn, and the drawn three-dimensional forest is high in sense of reality.