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Author |
Josep Llados; Jaime Lopez-Krahe; Enric Marti |
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A system to understand hand-drawn floor plans using subgraph isomorphism and Hough transform |
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1997 |
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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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IAM @ iam @ LLM1997a |
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1566 |
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Author |
Josep Llados; Gemma Sanchez; Enric Marti |
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Title |
A String-Based Method to Recognize Symbols and Structural Textures in Architectural Plans. |
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Miscellaneous |
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1997 |
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Second IAPR Workshop on Graphics Recognition, pp. 287–294. |
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DAG @ dag @ LSM1997 |
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44 |
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Author |
Gemma Sanchez; Josep Llados; Enric Marti |
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Title |
A string-based method to recognize symbols and structural textures in architectural plans |
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1997 |
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2nd IAPR Workshop on Graphics Recognition |
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This paper deals with the recognition of symbols and struc- tural textures in architectural plans using string matching techniques. A plan is represented by an attributed graph whose nodes represent characteristic points and whose edges represent segments. Symbols and textures can be seen as a set of regions, i.e. closed loops in the graph, with a particular arrangement. The search for a symbol involves a graph matching between the regions of a model graph and the regions of the graph representing the document. Discriminating a texture means a clus- tering of neighbouring regions of this graph. Both procedures involve a similarity measure between graph regions. A string codification is used to represent the sequence of outlining edges of a region. Thus, the simila- rity between two regions is defined in terms of the string edit distance between their boundary strings. The use of string matching allows the recognition method to work also under presence of distortion. |
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Nancy, France |
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IAM @ iam @ SLE1997 |
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1498 |
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Author |
Xavier Roca; X. Binefa; Jordi Vitria |
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A New Accomodation Algorithm for a Microscopy Environment. |
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1997 |
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VII National Symposium on Pattern Recognition and image Analysis. Vol. 2, pp. 66–67. |
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OR;ISE;MV |
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BCNPCL @ bcnpcl @ RBV1997 |
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37 |
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Author |
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 |
A. Pujol; Javier Varona; Joan Serrat |
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A machine vision system for the inspection of industrial sieves. |
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1997 |
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VII SNRFAI. |
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ADAS @ adas @ PVS1997 |
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33 |
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Author |
A. Martinez; Jordi Vitria |
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Title |
A first step towards a low-dimensional face representation space |
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1997 |
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CVC Technical Report #20 |
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CVC (UAB) |
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OR;MV |
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BCNPCL @ bcnpcl @ MaV1997b |
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532 |
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Author |
X. Binefa; Xavier Roca; Jordi Vitria |
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Title |
A Contrast Approach to Depth from Focus. |
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Miscellaneous |
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1997 |
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VII Simposium Nacional de Reconocimiento de Formas y Analisis de Imagenes. |
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Barcelona |
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OR;ISE;MV |
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BCNPCL @ bcnpcl @ BRV1997 |
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63 |
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