• Title/Summary/Keyword: Segment-length Thresholding

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Adaptive Segment-length Thresholding for Map Contour Extraction (등고선 추출을 위한 적응적 길이 임계화)

  • 박천주;오명관;전병민
    • The Journal of the Korea Contents Association
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    • v.3 no.4
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    • pp.23-28
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    • 2003
  • This paper describes, in order to extract contour from topographic map image, an adaptive segment-length thresholding using a threshold depended on target image. First of all, after recognizing the primary symbols and detecting two edges from the projection histogram of the elevation value area, the threshold value is determined by the distance between the edges. Then, the subdivision is peformed by searching a branch point and erasing its neighboring Hack pixels. And contour components are extracted by segment-length thresholding. The experimental result shows that the final image contains non-contour component of 2.41% and contour one of 97.59%.

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