A photographer uses various techniques, such as enhancing lighting or using specialized filters or lenses, to set the scene for film or digital photographs. Photographers who shoot digital images then upload them to a computer, while those who use film cameras outsource their film for processing or develop it themselves. Photographers also use computer software to modify images, such as cropping them or correcting their color. Photographers may focus their work on a particular specialty, like portrait photography, wedding photography, artistic photography, scientific photography or industrial photography.