1. A method comprising: generating, by a computing device, a skin mask based on an occluded image of an individual; removing, by the computing device, occluded areas for the occluded image using the skin mask so that skin areas remain; generating, by the computing device, a correlation filter from the masked occluded image of the individual; applying, by the computing device, the skin mask and correlation filter to a non-occluded input image of an individual; and generating, by the computing device, a correlation output based on applying the skin mask and correlation filter to the non-occluded input image, which indicates a likelihood that the individual in the non-occluded input image is of the individual in the occluded image.