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Pattern spot merging method for maintaining structured ground object contour characteristics

A structured and ground-object technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as loss of ground spatial structure features

Active Publication Date: 2019-08-27
CHINESE ACAD OF SURVEYING & MAPPING
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Problems solved by technology

[0005] Therefore, there is an urgent need for a patch merging method that maintains the contour features of structured objects, so as to avoid the loss of some or all of the spatial structure features caused by changing the boundaries of objects with special spatial structures during the merging process in the prior art. the occurrence of the situation

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  • Pattern spot merging method for maintaining structured ground object contour characteristics
  • Pattern spot merging method for maintaining structured ground object contour characteristics
  • Pattern spot merging method for maintaining structured ground object contour characteristics

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Embodiment 2

[0183] Furthermore, in order to verify the effectiveness of the method in this paper, relying on the WJ-III map workstation developed by the Chinese Academy of Surveying and Mapping Sciences, the out-in-based method of merging terrain conditions is embedded, and the 1:10,000 geographic census data of southern provinces and counties is used for testing . The spatial extent of the experimental data is 699.38km 2 , including cultivated land, forest land, buildings, water systems and other first-class land types, the test area is densely packed with buildings, but not uniform, and buildings of different directions and sizes are interlaced and adjacent to each other, visually presenting an obvious linear pattern and network grid mode. The operating environment of the software system is Windows7 64-bit operating system, the CPU is IntelCore I7-3770, the main frequency is 3.2GHz, the memory is 16GB, and the solid-state hard disk is 1024GB.

[0184] The combined results obtained by ...

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Abstract

The invention discloses a pattern spot merging method for maintaining the contour characteristics of a structured ground object, which comprises the following steps of: A, acquiring original pattern spot data of a full overlay vector, and extracting the structured ground object; b, identifying a typical spatial distribution mode in the structured ground object; c, identifying aggregated structuredground objects forming a typical spatial distribution mode, and extracting peripheral boundary contours of the structured ground objects; d, merging the aggregated structured ground objects in the peripheral boundary contour to obtain a structured ground object merging processing result; carrying out merging operation on the original image spot data to obtain an original image spot data merging result; e, performing dissimilar operation on the peripheral boundary contour of the aggregated structured ground object and the original image spot data merging result, and determining each backfill position needing to be backfilled in the original image spot data merging result; and F, inlaying the structured ground object merging processing result into each backfill position in the original pattern spot data merging result to obtain a backfilled pattern spot data full-coverage merging result.

Description

technical field [0001] The invention relates to the field of map drawing and map synthesis, in particular to a method for merging map spots that maintains the outline features of structured ground objects. Background technique [0002] With the increasing depth and breadth of the application of geographic national conditions census data, it is increasingly urgent to comprehensively reflect regional land use conditions from large-scale land cover data (patterns) to various small-scale data. However, land use thematic data is a kind of full-coverage and non-overlapping spatial coverage. When the map changes from a large scale to a small scale, it is difficult to express the small and narrow spots on the map. At this time, it is necessary to map Spot merge operation. The merging operation can be divided into two types: fusion (amalgamation) and aggregation (aggregation). Among them, fusion refers to the process of merging small patches into topologically adjacent patches with ...

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Application Information

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IPC IPC(8): G06T7/136G06T7/187
CPCG06T2207/30184G06T7/136G06T7/187
Inventor 李成名武鹏达殷勇吴伟郭沛沛印洁刘晓丽洪志远路文娟张成成
Owner CHINESE ACAD OF SURVEYING & MAPPING
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