Skin diagnostic techniques employed in conjunction with image processing techniques. For example, a user information module captures a user skin image. A graphical user interface enables selection of a skin-related application from a plurality of skin-related applications. A processor determines user skin image data from the user skin image, and identifies one or more sets of skin image data in the skin image database that correspond to the user skin image data based on one or more parameters specified by the skin-related application. The processor applies at least one image processing filter that corresponds to the one or more identified sets of skin image data from the skin image database to the user skin image to generate a simulated user skin image. An output display displays the simulated user skin image.