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  • Research Article
  • Open Access

Flat Zone Analysis and a Sharpening Operation for Gradual Transition Detection on Video Images

  • 1, 2Email author,
  • 3,
  • 1 and
  • 4
EURASIP Journal on Advances in Signal Processing20042004:578032

  • Received: 1 September 2003
  • Published:


The boundary identification represents an interesting and difficult problem in image processing, mainly if two flat zones are separated by a gradual transition. The most common edge detection operators work properly for sharp edges, but can fail considerably for gradual transitions. In this work, we propose a method to eliminate gradual transitions, which preserves the number of the image flat zones. As an application example, we show that our method can be used to identify very common gradual video transitions such as fades and dissolves.

Keywords and phrases

  • flat zone analysis
  • video transition identification
  • visual rhythm

Authors’ Affiliations

Laboratoire Algorithmique et Architecture des Systèmes Informatiques, École Supérieure d'Ingénieurs en Électronique et Électrotechnique, Noisy Le Grand Cedex, Paris, 93162, France
Institute of Computing, Pontifical Catholic University of Minas Gerais, Belo Horizonte, MG, 31980-110, Brazil
Institute of Computing, State University of Campinas, Campinas, 13084-971, SP, Brazil
Computer Science Department, Universidade Federal de Minas Gerais, 6627 Pampulha, Belo Horizonte, MG, Brazil


© Guimarães et al. 2004