The recognition of symbols in graphic documents is an intensive research activity in the
community of pattern recognition and document analysis. A key issue in the interpretation of …

We propose an error-tolerant subgraph isomorphism algorithm formulated in terms of region
adjacency graphs (RAG). A set of edit operations to transform one RAG into another one are …

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 …

From the very beginning of written scripts, contents of documents generally comprise of text,
images, figures, graphs and graphic symbols. A graphic recognition system involves …

A network used to detect and recognize several different symbols (doors, windows...) in
scanned architectural drawings is presented. This network, based on Messmer's network for …

In this paper, we review some ideas which emerged in the early years of research on symbol
recognition and we show how these ideas evolved into a large variety of contributions. We …

Median is a general concept of capturing the essential information of a given set of objects.
In this work we adopt this concept to the problem of learning, or synthesis, of representative …

This paper deals with the recognition of symbols and structural textures in architectural plans
using string matching techniques. A plan is represented by an attributed graph whose nodes …

The different aspects of a process for recognizing symbols in documents are considered and
the techniques that have been most commonly used during the last ten years, in the different …

Symbol recognition is a well-known challenge in the field of graphics recognition. Due to the
representational power of graph structures, a number of graph-based approaches are used …