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Quantitative color assessment of dermoscopy images using perceptible color regions

Authors

  • Gunwoo Lee,

    1. Biomedical Engineering, Biomedical Science of Brain Korea 21, Korea University College of Medicine, Seoul, Korea
    2. Research Institute for Skin Image, Korea University Medical Center, Seoul, Korea
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  • Onseok Lee,

    1. Biomedical Engineering, Biomedical Science of Brain Korea 21, Korea University College of Medicine, Seoul, Korea
    2. Research Institute for Skin Image, Korea University Medical Center, Seoul, Korea
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  • Sunup Park,

    1. Biomedical Engineering, Biomedical Science of Brain Korea 21, Korea University College of Medicine, Seoul, Korea
    2. Research Institute for Skin Image, Korea University Medical Center, Seoul, Korea
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  • Jongsub Moon,

    1. Neural Network Laboratory, Korea University, Seoul, Korea
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  • Chilhwan Oh

    Corresponding author
    1. Research Institute for Skin Image, Korea University Medical Center, Seoul, Korea
    2. Department of Dermatology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
    • Biomedical Engineering, Biomedical Science of Brain Korea 21, Korea University College of Medicine, Seoul, Korea
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Address:

Chil Hwan Oh

Department of Dermatology

Korea University Guro Hospital

Korea University College of Medicine

97 Guro-dong gil, Guro-dong

Guro-gu

Seoul, 152-703

Korea

Tel: +82 2 2626 1894

Fax: +82 2 2626 1900

e-mail: choh@korea.ac.kr

Abstract

Background

Dermoscopy is a non-invasive in vivo skin imaging technique that assists dermatologists in diagnosing melanoma. However, the use of dermoscopy for diagnosis requires extensive training since this approach often provides extremely complex and subjective information. The presence of an imperceptible color difference in dermoscopy images is one of the serious problems associated with the use of this technique. This imperceptible color difference leads to inaccurate lesion extraction at the borders and hinders the assessment of lesion features. Therefore, objective and quantitative assessment based on perceptible color differences is important for the diagnosis of melanoma using dermoscopy.

Methods

In this study, we developed a method for assessing colors in a lesion. Twenty-seven perceptible color regions based on the multi-thresholding method in each color channel were constructed, and dominant color region (DCR), bluish dominant region (BDR), and the number of colors were assessed as three diagnostic parameters from these perceptible color regions on 150 dermoscopy images.

Results/Conclusion

Diagnostic accuracy was calculated by combination of three diagnostic parameters derived from DCR, BDR, and the number of colors. Diagnostic accuracy with 73.33% sensitivity and 90.67% specificity was obtained in case of positive features in more than two parameters.

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