This page offers you some of my publications about "drawing interpretation". Feel free to download what ever you want. They are stored as encapsulated postscript compressed by gzip or WinZip. Gzip is a public domain compression tool from GNU. If you don't already have it, you will find it easily in the web (for various platforms).
1996, Dissertation am Fachbereich Informatik der Universität Hamburg, 220 pages, German text
The Thesis (written in German) summarizes all my research on drawing interpretation. It should provide you with a much better understanding of my work than the conference papers below. On the other hand you must be able to read German and you will need some time to go through the 200+ pages.
1996, Dissertation am Fachbereich Informatik der Universität Hamburg, 220 pages, German text
The Thesis (written in German) summarizes all my research on drawing interpretation. It should provide you with a much better understanding of my work than the conference papers below. On the other hand you must be able to read German and you will need some time to go through the 200+ pages.
1995, published paper (ICDAR'95), 4 pages (long version: 15 pages), English text
Abstract:
The objective of this paper is to demonstrate how taxonomic structures in knowledge representation can be exploited for drawing interpretation tasks. After a brief survey of the different levels of knowledge representation used by today's interpretation systems, some basic assumptions about the nature of drawing interpretation and the representation of knowledge will be discussed. Based on these widely valid assumptions, the advantages of an explicit declaration of the objects' taxonomy and partonomy (part-of relations) will be presented. In addition to the obvious results of a better readability and maintainability of the represented knowledge, it shall be shown how a complete and correct interpretation strategy can be automatically derived from only a handful of declarations. By this declarative approach the paper might shed some light on the special role of drawing interpretation as an mediator between the graphical and the applicational world. Taking into account this duality the paper introduces two different schemes of taxonomy and tries to establish rules for reasoning on dual taxonomies.
Boris Pasternak, Gabriel Gabrielides, Rainer Sprengel
1992, Memo, 32 pages, English text
Abstract:
This report describes the design and development of a prototype for the interpretation of technical drawings, called WIZ. The report introduces drawing interpretation as a knowledge processing task. At first, the state of the art in drawing analysis is examined. Then, starting from a discussion about the necessary kinds of knowledge to perform drawing interpretation, we present our frame-based knowledge structure and explain its implementation using a generic blackboard model. This allows easy adaptibility to new application domains. The main part of the report deals with the basic interpretation cycle which exploits a-priori knowledge about the drawing structure and associated geometrical constraints. This is discussed in detail for an example from the area of engineering drawings. The interpretation starts with the vectorization primitives and stops when physical objects (axles, cylinders, etc.) and non-physical dimensioning objects (dimension sets, metric arrows, etc.) are recognized. It is shown that the results of drawing interpretation can be used for domain specific tasks, e.g. dimension checking or drawing redesign. Finally, a graph-based strategy for dimension checking is described in detail.
