Incremental update method and device in distributed display

Abstract

The invention provides an incremental update method in distributed display. The incremental update method comprises the steps of obtaining an intersection set of a vector data coordinate range needing displaying in every display node and a currently-displayed vector data coordinate range; screening a newly-increased vector data coordinate range according to the vector data coordinate range needing displaying in every display node and the corresponding intersection set if the intersection set is available; performing displaying according to vector data corresponding to the requirements of the newly-increased vector data coordinate range of every display node; and if no intersection set is available, performing displaying according to vector data corresponding to the requirements of vector data coordinate range needing displaying in every display node. The invention further provides an incremental update device in the distributed display. The data demand at a data server end can be effectively reduced, network transmission data quantity is effectively reduced, and overall performance of a system is improved.

Description

technical field [0001] The invention relates to the field of image display control, in particular to an incremental update method and device in distributed display. Background technique [0002] In the prior art, when rendering a map, especially when displaying a map on a mosaic wall, in order to display the map efficiently, the map is usually preprocessed to generate several pictures of the same size according to different scales, and then use The distributed display method is displayed on the video wall, so that each display node of the video wall only displays the corresponding part of the map. For the massive vector data that needs to be displayed in real time, a similar method can be used to cut the vector data. Each display node can request the data server to obtain and render the corresponding range of vector data through the network, so as to achieve vector data performance. The purpose of displaying correctly on the video wall. [0003] One of the currently existi...

AI Technical Summary

Problems solved by technology

[0003] One solution currently exists is: when the map display range changes frequently, each display node needs to request all the vector data within its own range from the data server, so when there are many vector data to be displayed and a large number of When the display node is displayed, the data server needs to process a large number of relatively large data requests. Due to the high amount of data to be transmitted, the efficiency decreases, which affects the overall system performance.

Images