Abstract
Melanoma is one of the many sorts of tumors which appear on the skin, and it is the most malignant one. Early detection and treatment are very important for curing of melanoma. But there are no objective methods to measure its malignancy and ingravescence. At present the diagnosis of melanoma is mainly done based on the experience of each doctor, and they need some objective measures for diagnosis of melanoma. So we propose the methods to measure its malignancy and ingravescence from the shape and the color information of the lesions with image processing.