The invention relates to a method for realizing overlapping display of a radar background map which is accurately matched with a radar range and can roam in real time. Specific to the requirement on the overlapping display of the radar background map which is accurately matched with the radar range and can roam in real time, the method comprises the following steps: mapping original longitude and latitude map data into polar coordinates by taking a current radar position (latitude and longitude) as a center, and mapping the polar coordinates into OpenGL or D3D vertex coordinates; performing color filling on relevant regions such as land and water areas with a complex polygon filling method of the OpenGL or D3D; setting an appropriate projection matrix to realize conversion from the OpenGL or D3D vertex coordinates to screen coordinates in order to finish map rendering; and realizing accurate matching of the map with the radar range and real-time roaming along with the radar position through setting of reasonable zooming and translation matrixes with a hardware acceleration method of a graphics processing unit (GPU).

Method for realizing overlapping display of background map supporting accurate matching and real-time roaming

The invention relates to a multi-type sensor information real-time display method by software based on a software 3D (three-dimensional) game view angle picture display mode, which mainly uses the direct 3D multimedia development technique. The method includes: firstly, using a programmable pipeline way (GPU (graphic processing unit) rendering) to give full play of GPU functions and realize great improvement of display efficiency by the aid of high efficiency of direct 3D; and secondly, using direct 3D to process flexibility of pictures, on the one hand, using a 3D game view angle picture display mode to realize display of special effects such as eccentric display, zooming display, superposition of background maps, roaming and the like by continuously adjusting world coordinates and viewpoint coordinates in 3D scenes, and on the other side, using a video image alpha channel mixing way to realize afterglow display of radar video. The method has the advantages of high programming flexibility, high instantaneity, low cost, easiness in implementation and the like based on a commercial computer framework.

Shaopeng Wu

Papers

Multi-type sensor information real-time display method by software based on commercial graphic card