A system and method is provided for improving the visibility of hair on the skin surface, in a region that is bloodied or bruised, and potentially expanding the candidate pool of the hair grafts to be selected for harvesting. The system uses a light source comprising at least two emitters and the method comprises controlling the contrast between the image of the blood and the image of the skin surface. The method of the present invention may be implemented with various hair harvesting and transplantation systems, including manual, partially automated and fully automated systems.
