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Journal of Digital Imaging

, Volume 23, Issue 5, pp 538–546 | Cite as

A New Fast Fractal Modeling Approach for the Detection of Microcalcifications in Mammograms

  • Deepa Sankar
  • Tessamma Thomas
Article

Abstract

In this paper, a novel fast method for modeling mammograms by deterministic fractal coding approach to detect the presence of microcalcifications, which are early signs of breast cancer, is presented. The modeled mammogram obtained using fractal encoding method is visually similar to the original image containing microcalcifications, and therefore, when it is taken out from the original mammogram, the presence of microcalcifications can be enhanced. The limitation of fractal image modeling is the tremendous time required for encoding. In the present work, instead of searching for a matching domain in the entire domain pool of the image, three methods based on mean and variance, dynamic range of the image blocks, and mass center features are used. This reduced the encoding time by a factor of 3, 89, and 13, respectively, in the three methods with respect to the conventional fractal image coding method with quad tree partitioning. The mammograms obtained from The Mammographic Image Analysis Society database (ground truth available) gave a total detection score of 87.6%, 87.6%, 90.5%, and 87.6%, for the conventional and the proposed three methods, respectively.

Key words

Breast cancer mammograms deterministic fractals fractal image modeling microcalcifications 

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Copyright information

© Society for Imaging Informatics in Medicine 2009

Authors and Affiliations

  1. 1.Department of ElectronicsCochin University of Science & TechnologyKochiIndia

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