Photography began in the 18th century with the camera obscura, which projected images but could not capture them permanently. In the early 19th century, Joseph Nicéphore Niépce and Louis Daguerre developed early photographic processes to capture permanent images, with exposure times of hours or minutes. Throughout the 19th century, various photographic processes were invented, including the collodion process and gelatin dry plates, reducing exposure times to seconds. In the late 19th century, George Eastman developed roll film and the Kodak camera, making photography widely accessible. The 20th century saw many innovations including 35mm film, SLR cameras, color film, digital cameras and camera phones, transforming photography into a