1. A method, comprising: receiving, with at least one processor, an image comprising a human head; determining a center of the human head in the image; grouping one or more pixels of the image into one or more super pixels; generating a polar coordinate grid corresponding to the image, wherein the polar coordinate grid comprises one or more grid points and wherein the polar coordinate grid originates from the center of human head; labeling the one or more grid points as corresponding to one of a face region, a hair region, and a background region based on a tiered structure constraint; labeling the one or more super pixels as corresponding to one of the face region, the hair region, and the background region based on the one or more labels of the one or more grid points; and transmitting a notification comprising the one or more labels of the one or more super pixels.