GREC2007 continued the tradition of past workshops held at Penn State University, USA (GREC 1995, LNCS Volume 1072, Springer, 1996); Nancy, France (GREC 1997, LNCS Volume 1389, Springer, 1998); Jaipur, India (GREC 1999, LNCS Volume 1941, Springer, 2000); and Hong Kong, China (GREC 2005, LNCS Volume 3926, Springer, 2006).

Technical Documents, Maps and Diagrams Understanding.- Automatically Making Origami Diagrams.- An Adaptative Recognition System Using a Table Description Language for Hierarchical Table Structures in Archival Documents.- Converting ECG and Other Paper Legated Biomedical Maps into Digital Signals.- Symbol and Shape Description and Recognition (1).- Hand Drawn Symbol Recognition by Blurred Shape Model Descriptor and a Multiclass Classifier.- On the Combination of Ridgelets Descriptors for Symbol Recognition.- Symbol and Shape Description and Recognition (2).- Old Handwritten Musical Symbol Classification by a Dynamic Time Warping Based Method.- On the Joint Use of a Structural Signature and a Galois Lattice Classifier for Symbol Recognition.- A Discriminative Representation for Symbolic Image Similarity Evaluation.- ARG Based on Arcs and Segments to Improve the Symbol Recognition by Genetic Algorithm.- Information Retrieval, Indexing and Spotting.- Spotting Symbols in Line Drawing Images Using Graph Representations.- A Region-Based Hashing Approach for Symbol Spotting in Technical Documents.- A System for Historic Document Image Indexing and Retrieval Based on XML Database Conforming to MPEG7 Standard.- An Ancient Graphic Documents Indexing Method Based on Spatial Similarity.- A Fast CBIR System of Old Ornamental Letter.- Sketching Interfaces and On-Line Processing.- Developing Domain-Specific Gesture Recognizers for Smart Diagram Environments.- Using Error Recovery Techniques to Improve Sketch Recognition Accuracy.- Representing and Parsing Sketched Symbols Using Adjacency Grammars and a Grid-Directed Parser.- Categorization of Digital Ink Elements Using Spectral Features.- Feature and Primitive Analysis and Segmentation.- A Figure Image Processing System.- A Segmentation Scheme Based on a Multi-graph Representation: Application to Colour Cadastral Maps.- Smoothing a Network of Planar Polygonal Lines Obtained with Vectorization.- Verification of the Document Components from Dual Extraction of MRTD Information.- A System to Segment Text and Symbols from Color Maps.- A Non-symmetrical Method of Image Local-Difference Comparison for Ancient Impressions Dating.- Performance Evaluation and Ground Truthing.- Generating Ground Truthed Dataset of Chart Images: Automatic or Semi-automatic?.- Performance Characterization of Shape Descriptors for Symbol Representation.- Building Synthetic Graphical Documents for Performance Evaluation.- A Study on the Effects of Noise Level, Cleaning Method, and Vectorization Software on the Quality of Vector Data.- GREC 2007 Arc Segmentation Contest: Evaluation of Four Participating Algorithms.- Report on the Third Contest on Symbol Recognition.- Panel Discussion.- Is Graphics Recognition an Unidentified Scientific Object?.

This book constitutes the thoroughly refereed post-proceedings of the 7th International Workshop on Graphics Recognition, GREC 2007, held in Curitiba, Brazil in September 2007. The 30 revised full papers presented together with a panel discussion report were carefully selected and improved during two rounds of reviewing and revision. The papers are organized in topical sections on technical documents, maps and diagrams understanding;  symbol and shape description and recognition; information retrieval, indexing and spotting; sketching interfaces and on-line processing; feature and primitive analysis and segmentation; performance evaluation and ground truthing.

GPSR Compliance The European Union's (EU) General Product Safety Regulation (GPSR) is a set of rules that requires consumer products to be safe and our obligations to ensure this. If you have any concerns about our products you can contact us on ProductSafety@springernature.com. In case Publisher is established outside the EU, the EU authorized representative is: Springer Nature Customer Service Center GmbH Europaplatz 3 69115 Heidelberg, Germany ProductSafety@springernature.com