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Spectral images of skin malformations taken by different prototypes: (a) nevus taken by smartphone—RGB LED prototype at white, red, green and blue illumination [18]; (b) nevus taken by SkImager at white, red, green, blue and NIR illumination [49]; (c) papilloma taken by modified video-microscope at blue, green, red and NIR illumination [23]; (d) melanoma taken by modified video-microscope at blue, green, red and NIR illumination [23].
