Automatic lesion border selection in dermoscopy images using morphology and color features

Purpose We present a classifier for automatically selecting a lesion border for dermoscopy skin lesion images, to aid in computer‐aided diagnosis of melanoma. Variation in photographic technique of dermoscopy images makes segmentation of skin lesions a difficult problem. No single algorithm provides an acceptable lesion border to allow further processing of skin lesions. Methods We present a random forests border classifier model to select a lesion border from 12 segmentation algorithm borders, graded on a “good‐enough” border basis. Morphology and color features inside and outside the automatic border are used to build the model. Results For a random forests classifier applied to an 802‐lesion test set, the model predicts a satisfactory border in 96.38% of cases, in comparison to the best single border algorithm, which detects a satisfactory border in 85.91% of cases. Conclusion The performance of the classifier‐based automatic skin lesion finder is found to be better than any single algorithm used in this research.