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Maria Vanrell; Jordi Vitria; Xavier Roca |
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A multidimensional scaling approach to explore the behavior of a texture perception algorithm. |
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1997 |
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Machine Vision and Applications |
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9 |
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262–271 |
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OR;ISE;CIC;MV |
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BCNPCL @ bcnpcl @ VVR1997 |
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35 |
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Author |
Josep Llados; Jaime Lopez-Krahe; Enric Marti |
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Title |
A system to understand hand-drawn floor plans using subgraph isomorphism and Hough transform |
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1997 |
Publication |
Machine Vision and Applications |
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10 |
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3 |
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150-158 |
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Line drawings – Hough transform – Graph matching – CAD systems – Graphics recognition |
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Presently, man-machine interface development is a widespread research activity. A system to understand hand drawn architectural drawings in a CAD environment is presented in this paper. To understand a document, we have to identify its building elements and their structural properties. An attributed graph structure is chosen as a symbolic representation of the input document and the patterns to recognize in it. An inexact subgraph isomorphism procedure using relaxation labeling techniques is performed. In this paper we focus on how to speed up the matching. There is a building element, the walls, characterized by a hatching pattern. Using a straight line Hough transform (SLHT)-based method, we recognize this pattern, characterized by parallel straight lines, and remove from the input graph the edges belonging to this pattern. The isomorphism is then applied to the remainder of the input graph. When all the building elements have been recognized, the document is redrawn, correcting the inaccurate strokes obtained from a hand-drawn input. |
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DAG;IAM |
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IAM @ iam @ LLM1997a |
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1566 |
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Author |
Josep Llados; Horst Bunke; Enric Marti |
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Finding rotational symmetries by cyclic string matching |
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1997 |
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Pattern recognition letters |
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PRL |
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18 |
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14 |
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1435-1442 |
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Rotational symmetry; Reflectional symmetry; String matching |
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Symmetry is an important shape feature. In this paper, a simple and fast method to detect perfect and distorted rotational symmetries of 2D objects is described. The boundary of a shape is polygonally approximated and represented as a string. Rotational symmetries are found by cyclic string matching between two identical copies of the shape string. The set of minimum cost edit sequences that transform the shape string to a cyclically shifted version of itself define the rotational symmetry and its order. Finally, a modification of the algorithm is proposed to detect reflectional symmetries. Some experimental results are presented to show the reliability of the proposed algorithm |
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Elsevier |
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DAG;IAM; |
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IAM @ iam @ LBM1997a |
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1562 |
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J. Weickert; Bart M. Ter Haar Romeny; Antonio Lopez; W. Van Enk |
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Title |
Orientation Analysis by Coherence-Enhancing Diffusion. |
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1997 |
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Proc. of the Real World Computing Symposium. |
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ADAS @ adas @ WTL1997 |
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211 |
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A. Martinez; S. Gonzalez; Jordi Vitria; J. Lopez |
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NAT: a robot that recognizes offices. |
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1997 |
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Proceedings of CAEPIA–97. VII Conferencia de la Asociación Española para la Inteligencia Artificial. |
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327-336 |
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CAEPIA |
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OR;MV |
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BCNPCL @ bcnpcl @ MGV1997 |
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46 |
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Author |
Javier Varona; Juan J. Villanueva |
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NeuroFilters: Neural Networks for image Processing. |
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1997 |
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Proceedings Volume 3101, New Image Processing Techniques and Applications: Algorithms, Methods, and Components II |
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3101 |
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Munich |
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ISE @ ise @ VaV1997a |
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207 |
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Author |
V. Valev; B. Sankur; Petia Radeva |
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Generalized Non-Reducible Descriptors. |
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1997 |
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Technical Report. |
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MILAB |
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BCNPCL @ bcnpcl @ VSR1997 |
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65 |
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Author |
Josep Llados; Enric Marti |
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Title |
Playing with error-tolerant subgraph isomorphism in line drawings |
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1997 |
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VII National Symposium on Pattern Recognition and image Analysis |
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DAG;IAM; |
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IAM @ iam @ LlM1997 |
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1570 |
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