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Abstract
Melanoma is the most lethal form of skin cancer, and develops from mutation of pigment-producing cells. As it becomes malignant, it usually grows in size, changes proportions, and develops an irregular border. We introduce a system for early detection of such changes, which enables whole-body screening, especially useful in patients with atypical mole syndrome. The paper proposes a procedure to build a 3D model of the patient, relate the high-resolution skin images with the model, and orthorectify these images to enable detection of size and shape changes in nevi. The novelty is in the application of image encoding indices and barycentric coordinates of the mesh triangles. The proposed procedure was validated with a set of markers of a specified geometry. The markers were attached to the body of a volunteer and analyzed by the system. The results of quantitative comparison of original and corrected images confirm that the orthorectification allows for more accurate estimation of size and proportions of skin nevi.
Highlights
Melanoma develops as a flat lesion from a mutation of the pigment-producing cells melanocytes
The image reconstruction procedure is based on the fact that for each point of the reconstructed image, we find its counterpart in the texture image
We have presented a complete procedure for building a whole-body model to enable the correction of nevi geometries
Summary
The incidence of skin cancers among fair-skinned populations has increased over the past decades, becoming a growing public health problem [1,2]. Some of the skin cancer forms include squamous cell carcinoma, basal cell carcinoma, and melanoma [1]. Melanomas constitute only around 2% of all diagnosed cases of skin cancers, they are the most deadly of all types [1,5,6]. Melanoma develops as a flat lesion from a mutation of the pigment-producing cells melanocytes. The skin spots are small, but they grow in size quite quickly and infiltrate deeper layers of the skin to spread to the lymph nodes, bones, and lungs if not cured. The 5-year survival rate of melanoma can reach 99%
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