52results about How to "Drawing implementation" patented technology

The invention relates to a computer drawing method for vector map symbols with image smoothing characteristic. In the method, the image display characteristic is analyzed by taking image characteristic of aliasing phenomenon of the vector map symbol on a display device as a start point under the condition that the resolution of the device is not increased; and the vector map symbol is smoothly drawn through sampling and image filtering according to categories of points, lines and planes of the map symbol. The drawing method overcomes the defects of rough display of the conventional vector mapsymbol and large superimposition display contrast with image data and the vector drawing is converted into image processing and output, so that computer fine drawing of all map symbols can be realized and the drawing method has great significance for the field of geographic information visualization.

A method and system for drawing a traffic intersection signal timing diagram, wherein the method includes: establishing intersection geographic coordinate configuration information in the same format as that of a road network information database on a client; obtaining the intersection geographic coordinate configuration of the client corresponding to the traffic intersection to be drawn information, and analyze the geographic coordinate configuration information of the intersection to obtain the geographic coordinates of the intersection; read the road network information of the traffic intersection corresponding to the geographic coordinate position of the intersection from the road network information database according to the geographic coordinates of the intersection, wherein, The road network information includes crossing information, isolation strip information, zebra crossing information, and green belt information; according to the road network information and using a drawing engine to draw a schematic base map of traffic crossings; obtain the time series data of the signal lights at traffic crossings that need to be drawn, according to The timing data draws the status of traffic lights on the schematic base map of traffic intersections to obtain the timing diagram of traffic intersection signals. Through this scheme, the real-time performance of obtaining the signal timing diagram of the traffic intersection is improved.

A method for drawing a topological graph is disclosed and is used to realize the drawing of the topological graph. The method reduces occupied memory and improves the drawing speed of the topological graph. The method includes: creating a simple graph object according to a type attribute of resources; calculating a screen density value according to the number of network elements of the resources located in a screen visible area and judging whether the screen density value is greater than a preset screen density threshold value; creating an integrated graph object for the resources according to all the attributes of the resources located in the screen visible area when the judgment result is negative. An apparatus used to realize the method is also disclosed.

This invention provides a method for drawing round punches including the following steps: selecting a round drawing, judging if said drawing is legal, if not, then the drawing is stopped, if it's legal, then the core and radius are remained, automatically reading the tolerant punch structure, correcting the tolerant parameter value of the structure based on the radius, judging if the modified parameter is legal, if it's not legal, then the parameter is modified again, if it's legal, then the center and the radius are read then to finish the drawing of multiple punches at one run.