Joseph Nicéphore Niépce
Louis Daguerre
Joseph Nicéphore Niépce (7 March 1765 – 5 July 1833) was a French inventor that created the world's oldest living photograph (View from the Window at Le Gras). To create this image, he dissolved bitumen of Judea (a kind of asphalt) in a solvent and coated a pewter plate with the resulting solution. When exposed to light in a camera obscura, the bitumen became hard and insoluble. After exposure the plate was washed in lavender oil and turpentine, which removed the soft unexposed bitumen, leaving a permanent image created by light.
Louis-Jacques-Mandé Daguerre (18 November 1787 – 10 July 1851) was a French artist as well as a photographer. He created the process of the daguerrotype which was a polished a sheet of silver-plated copper to a mirror finish that had been treated with fumes that made its surface light-sensitive.
William Henry Fox Talbot
William Henry Fox Talbot (11 February 1800 – 17 September 1877) was a British scientist, inventor and apioneer of photogrphy. Talbot’s calotypes involved the use of a photographic negative, from which multiple prints could be made; in this technique, a sheet of paper coated with silver chloride was exposed to light in a camera obscura; those areas hit by light became dark in tone, yielding a negative image.
George Eastman
George Eastman (July 12, 1854 – March 14, 1932) was an American innovator and entrepreneur. He invented dry, transparent, and flexible, photographic film - or rolled photography film - to which he used in his own Kodak cameras. The idea of creating a process where people could send the film to a company and get it developed was to encourage average people to be interested in photography.