Shape from Positional-Contrast

Characterising Sketches with Qualitative Line Arrangements

  • Authors
  • Björn Gottfried

Table of contents

  1. Front Matter
    Pages i-xviii
  2. Introduction

    1. Front Matter
      Pages 1-1
    2. Pages 3-11
  3. Theory

    1. Front Matter
      Pages 41-41
  4. Evaluation

    1. Front Matter
      Pages 133-133
    2. Pages 157-162
  5. Back Matter
    Pages 163-214

About this book


Graphical queries for the purpose of searching for pictorial information are of growing interest in areas where pictures provide valuable information, including, for instance, design, architecture, and engineering. Sketching graphical queries is a natural way of revealing the visual appearance of objects one has in mind.

Björn Gottfried develops computationally effective concepts for dealing with shape, in particular imprecise and incomplete sketched shapes. He exemplarily applies his method using graphical queries to search for historical objects. Specifying objects graphically, he shows that the new method is in fact capable of dealing with imprecise sketches.

Generally speaking, the notion of positional-contrast is introduced. It defines how patterns can be robustly dealt with. That is, the new representation distinguishes patterns by how they relate with regard to spatial relations. This notion can be applied for several purposes, including pattern recognition, motion analysis, and texture analysis.


Qualitative reasoning image databases motion pattern recognition spatial reasoning

Bibliographic information

  • DOI
  • Copyright Information Deutscher Universitäts-Verlag | GWV Fachverlage GmbH, Wiesbaden 2007
  • Publisher Name DUV
  • eBook Packages Computer Science
  • Print ISBN 978-3-8350-6070-8
  • Online ISBN 978-3-8350-9163-4
  • Buy this book on publisher's site