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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 4 — May. 4, 2011

Morphological rational operator for contrast enhancement

Hayde Peregrina-Barreto, Ana M. Herrera-Navarro, Luis A. Morales-Hernández, and Iván R. Terol-Villalobos  »View Author Affiliations

JOSA A, Vol. 28, Issue 3, pp. 455-464 (2011)

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Contrast enhancement is an important task in image processing that is commonly used as a preprocessing step to improve the images for other tasks such as segmentation. However, some methods for contrast improvement that work well in low-contrast regions affect good contrast regions as well. This occurs due to the fact that some elements may vanish. A method focused on images with different luminance conditions is introduced in the present work. The proposed method is based on morphological transformations by reconstruction and rational operations, which, altogether, allow a more accurate contrast enhancement resulting in regions that are in harmony with their environment. Furthermore, due to the properties of these morphological transformations, the creation of new elements on the image is avoided. The processing is carried out on luminance values in the u v Y color space, which avoids the creation of new colors. As a result of the previous considerations, the proposed method keeps the natural color appearance of the image.

© 2011 Optical Society of America

OCIS Codes
(100.2980) Image processing : Image enhancement
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics

ToC Category:
Image Processing

Original Manuscript: August 4, 2010
Revised Manuscript: January 17, 2011
Manuscript Accepted: January 18, 2011
Published: February 28, 2011

Virtual Issues
Vol. 6, Iss. 4 Virtual Journal for Biomedical Optics

Hayde Peregrina-Barreto, Ana M. Herrera-Navarro, Luis A. Morales-Hernández, and Iván R. Terol-Villalobos, "Morphological rational operator for contrast enhancement," J. Opt. Soc. Am. A 28, 455-464 (2011)

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