Shape detection from line drawings with local neighborhood structure

  • Authors:
  • Rujie Liu;Yuehong Wang;Takayuki Baba;Daiki Masumoto

  • Affiliations:
  • Fujitsu Research and Development Center, Co. Ltd, Beijing 100025, China;Fujitsu Research and Development Center, Co. Ltd, Beijing 100025, China;Fujitsu Laboratories Ltd, Kawasaki, Japan;Fujitsu Laboratories Ltd, Kawasaki, Japan

  • Venue:
  • Pattern Recognition
  • Year:
  • 2010

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Abstract

An object detection method from line drawings is presented. The method adopts the local neighborhood structure as the elementary descriptor, which is formed by grouping several nearest neighbor lines/curves around one reference. With this representation, both the appearance and the geometric structure of the line drawing are well described. The detection algorithm is a hypothesis-test scheme. The top k most similar local structures in the drawing are firstly obtained for each local structure of the model, and the transformation parameters are estimated for each of the k candidates, such as object center, scale and rotation factors. By treating each estimation result as a point in the parameter space, a dense region around the ground truth is then formed provided that there exist a model in the drawing. The mean shift method is used to detect the dense regions, and the significant modes are accepted as the occurrence of object instances.