Xerox doesn't elucidate where the images are coming from, simply that they're classified using the company's automatic image categorizer, then filtered by if the image is good or not. For starters, the categorizer is broken, as you can see in the image above. That's meant to show birds, but within the first dozen "good" images are shots of a giraffe, leaves, a woman in a kimono, and an insect. Jumping over to the flowers section, you can also see the weaknesses of the algorithm, where it heavily favors images shot against a black background, at the expense of all others — likewise with portraits. Judging all photos "good" or "bad" by strict rules only leads to uninspired photography, and reminds me of nothing so much as when famous photos were submitted to photo review sites.