1. An apparatus to improve visual attractiveness of a region of human skin, the apparatus comprising: a housing adapted to be manually moved over the region of human skin; at least one camera attached to the housing, the camera generating one or more images of the region of human skin, the region of human skin allocated into a plurality of frexels; a computing environment located within the housing and operable to perform operations comprising: processing the one or more images to measure reflective properties of a pattern within the plurality of frexels, determining a total amount of a substance to apply to specific frexels of the plurality of frexels based on the reflective properties, the total amount being applicable to the specific frexels to achieve a desired reflectance, the substance comprising at least one of an ink, a dye, a pigment and a bleaching agent, and determining an amount of the substance to apply to the specific frexels, the amount being a portion of the total amount and being applicable to the specific frexels to achieve a reflectance different from the desired reflectance; and an application head attached to the housing, the application head applying the substance to the specific frexels based on the amount to modify the pattern.