Creating a mosaic from a photograph can be a challenging task. One tool for transferring a photo's tonal qualities to a template involves the use of an image editor. Three free and simple to use examples of editors are LunaPic, Anymaking and Photo Editor. Selecting the Cartoon option in "Effects" transforms the image which can then be used to guide the placement of tesserae. Effects may be increased or lessened according to taste.
Examples below
1. LunaPic
