Edge Enhancement of Ultrasonic Images by Morphological Operations Based on Locally Variable Structuring Elements

Masayoshi TSUBAI  Masayasu ITO  

IEICE TRANSACTIONS on Information and Systems   Vol.E85-D   No.1   pp.190-198
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Measurements and Visualization Technology of Biological Information)
Category: Modeling
ultrasound B-mode image,  edge enhancement,  morphology,  variable structuring element,  

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Edge enhancement of noisy ultrasound images is important for medical diagnosis. Conventional edge enhancement methods are mainly directed to emphasizing the high-frequency components of the image. Because these methods emphasize also the noise of image, they are not suitable for noisy ultrasound images with speckle noise. In this paper, we propose an edge enhancement method using mathematical morphology based on a geometrical characteristics of the image, using locally variable structuring elements. We show that the proposed method enhances the edge of ultrasound images without noise emphasis.