J Med Syst - Combined Spline and B-spline for an improved automatic skin lesion segmentation in dermoscopic images using optimal color channel.

Tópicos

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Resumo

In a computerized image analysis environment, the irregularity of a lesion border has been used to differentiate between malignant melanoma and other pigmented skin lesions. The accuracy of the automated lesion border detection is a significant step towards accurate classification at a later stage. In this paper, we propose the use of a combined Spline and B-spline in order to enhance the quality of dermoscopic images before segmentation. In this paper, morphological operations and median filter were used first to remove noise from the original image during pre-processing. Then we proceeded to adjust image RGB values to the optimal color channel (green channel). The combined Spline and B-spline method was subsequently adopted to enhance the image before segmentation. The lesion segmentation was completed based on threshold value empirically obtained using the optimal color channel. Finally, morphological operations were utilized to merge the smaller regions with the main lesion region. Improvement on the average segmentation accuracy was observed in the experimental results conducted on 70 dermoscopic images. The average accuracy of segmentation achieved in this paper was 97.21 % (where, the average sensitivity and specificity were 94 % and 98.05 % respectively).

Resumo Limpo

computer imag analysi environ irregular lesion border use differenti malign melanoma pigment skin lesion accuraci autom lesion border detect signific step toward accur classif later stage paper propos use combin spline bspline order enhanc qualiti dermoscop imag segment paper morpholog oper median filter use first remov nois origin imag preprocess proceed adjust imag rgb valu optim color channel green channel combin spline bspline method subsequ adopt enhanc imag segment lesion segment complet base threshold valu empir obtain use optim color channel final morpholog oper util merg smaller region main lesion region improv averag segment accuraci observ experiment result conduct dermoscop imag averag accuraci segment achiev paper averag sensit specif respect

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