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    • 1. 发明申请
    • GRAPH BASED TOPOLOGICAL MAP MATCHING
    • 基于图形的拓扑图匹配
    • WO2012089285A1
    • 2012-07-05
    • PCT/EP2010/070973
    • 2010-12-31
    • TOMTOM GERMANY GMBH & CO. KGMUND, HeikoSCHARMAN, Hannes
    • MUND, HeikoSCHARMAN, Hannes
    • G01C21/30
    • G06T11/206G01C21/30
    • An improved method for matching traces derived from probe data to one or more line segments in a digital vector map. Points in a probe trace are provisionally matched one-by- one to line segments in the digital vector map to identify all possible matching candidates. A graph of the matching candidates is created having one or more paths. The graph has a plurality of sequential levels corresponding to the points in the probe trace. Each matching candidate is assigned to a level of the graph corresponding with trace point to which it relates. Edges are established between matching candidates in adjacent levels provided they are topologically related to one another. The graph is simplified and scored. The best paths deliver the matching results. The invention allows use of graph theoretic methods to find the best path through the graph, which in turn represents an efficient map matching algorithm. The concepts of this invention may be used in conjunction with longitudinal distance as matching criterion.
    • 一种改进的方法,用于将从探测数据导出的轨迹与数字矢量图中的一个或多个线段相匹配。 探针轨迹中的点临时匹配数字向量图中的线段,以识别所有可能的匹配候选。 创建具有一个或多个路径的匹配候选的图形。 图形具有与探针轨迹中的点对应的多个顺序水平。 每个匹配的候选者被分配到与其相关的跟踪点对应的图表的级别。 边缘在相邻级别的匹配候选者之间建立,只要它们在拓扑上相关。 图表被简化和评分。 最好的路径提供匹配的结果。 本发明允许使用图理论方法来找到通过该图的最佳路径,其又代表有效的地图匹配算法。 本发明的概念可以与纵向距离一起用作匹配标准。
    • 3. 发明申请
    • METHOD OF AUTOMATICALLY EXTRACTING LANE MARKINGS FROM ROAD IMAGERY
    • 从道路图像自动提取路标的方法
    • WO2012089261A1
    • 2012-07-05
    • PCT/EP2010/070895
    • 2010-12-29
    • TOMTOM BELGIUM NVBEKAERT, Tim
    • BEKAERT, Tim
    • G06K9/32G06K9/00
    • G06K9/32G06K9/00798
    • A method for automatically identifying and extracting lane markings from the center of a lane on a road surface without having to manually view the entire unmarked road surface extending between marked sections of the road surface is provided. The method includes a sequence of image processing steps. One sequence includes providing a stretch of road imagery (14). Further, performing a thresholding procedure on the road imagery (14). Then, filtering the thresholded road image to suppress bright markings on the sides of the lane and to maintain bright markings in the center of the lane. Further yet, classifying the bright markings in the center of the lane as a particular type of "lane marking". Lastly, geo-coding the "lane marking".
    • 提供了一种用于在路面上自动识别和提取车道中心的方法,而不必手动地观看在路面的标记部分之间延伸的整个未标记的路面。 该方法包括一系列图像处理步骤。 一个序列包括提供一段道路图像(14)。 此外,对道路图像(14)执行阈值处理。 然后,过滤阈值道路图像以抑制车道侧面的明亮标记,并在车道中心保持明亮的标记。 此外,将车道中心的明亮标记分类为特定类型的“车道标记”。 最后,对“车道标记”进行地理编码。
    • 10. 发明申请
    • INCREMENTAL NETWORK GENERATION PROVIDING SEAMLESS NETWORK
    • 增值网络生成提供无缝网络
    • WO2012089271A1
    • 2012-07-05
    • PCT/EP2010/070940
    • 2010-12-30
    • TOMTOM GERMANY GMBH & CO. KGMUND, HeikoSCHARMANN, Hannes
    • MUND, HeikoSCHARMANN, Hannes
    • G01C21/32G09B29/10
    • G01C21/26G01C21/32G06K9/00791G09B29/106
    • A system and method for generating a seamless road network of a large geographical area includes a plurality of GPS traces extending across a geographical area. A plurality of threads simultaneously employ entire traces to collectively generate the seamless road network. The method includes dividing the geographical area into tiles, with each trace extending across several tiles. Each thread can employ one of the traces while another thread employs another trace. Each thread employs an entire one of the traces extending across several tiles during a single step. A job scheduler and blocking table prevent threads from simultaneously processing traces having common tiles and disturbing one another. The threads employ an incremental map matching method, wherein the probe traces are compared to existing line segments of the digital map, and new line segments are created using the probe traces not matching the existing line segments.
    • 用于产生大地理区域的无缝道路网络的系统和方法包括跨越地理区域延伸的多个GPS迹线。 多个线程同时使用整个轨迹来共同生成无缝道路网络。 该方法包括将地理区域划分成瓦片,每个迹线延伸穿过几个瓦片。 每个线程可以使用其中一个跟踪,而另一个线程使用另一个跟踪。 每个线程在单个步骤中使用跨越多个瓦片的整个轨迹。 作业调度程序和阻止表阻止线程同时处理具有普通瓦片和相互干扰的跟踪。 线程使用增量映射匹配方法,其中将探针迹线与数字地图的现有线段进行比较,并且使用不匹配现有线段的探针迹线创建新的线段。