A Fully Automatic Random Walker Segmentation for Skin Lesions in a Supervised Setting

Abstract. We present a method for automatically segmenting skin lesions by initializing the random walker algorithm with seed points whose properties, such as colour and texture, have been learnt via a training set. We leverage the speed and robustness of the random walker algorithm and augment it into a fully automatic method by using supervised statistical pattern recognition techniques. We validate our results by comparing the resulting segmentations to the manual segmentations of an expert over 120 cases, including 100 cases which are categorized as difficult (i.e.: low contrast, heavily occluded, etc.). We achieve an Fmeasure of 0.95 when segmenting easy cases, and an F-measure of 0.85 when segmenting difficult cases.

• Type: Conference
• Year: 2009
• Where: MICCAI
• Authors: Paul Wighton, Maryam Sadeghi, Tim K. Lee, M. Stella Atkins
• Keywords: Difficult Cases, Manual Segmentations, Medical Imaging, MICCAI 2009, Random Walker Algorithm