Methods, systems, and computer program products used to locate a feature in a digital image. A first search is performed in the image to find candidate faces, where each candidate face found is a group of pixels in the image that satisfies a first pattern-matching criterion. A second search is performed in the image to find candidate eyes, where each candidate eye found is a group of pixels in the image that satisfies a second pattern-matching criterion. A third search is performed within each candidate face that includes at least one overlapping candidate eye to find red pupils, where each red pupil found is a group of pixels in the image. A color modification process is applied to the red pupils.