StereoscopyAn 1893-era World's Columbian Exposition viewer
First half of the 20th Century .....1904 versailles
Stieglitz StyleStieglitz's The Steerage 1907
Alfred Stieglitz (January 1, 1864 – July 13, 1946) was an American photographer and modern art promoter who was instrumental over his fifty-year career in making photography an accepted art form. In addition to his photography, Stieglitz is known for the New York art galleries that he ran in the early part of the 20th century, where he introduced many avant-garde European artists to the U.S. He was married to painter Georgia O'Keeffe
Paris Style 
Paris Style1933
Brassaï (pseudonym of Gyula Halász) (9 September 1899 – 8 July 1984) was a Hungarian photographer, sculptor, and filmmaker who rose to fame in France.
Paris Stylebeginning of new photography era ...
Avenue des Gobelins (1927)
Eugène Atget (February 12, 1857 – August 4, 1927) was a French photographer noted for his photographs documenting the architecture and street scenes of Paris.
First half of the 20th Century .....
ImagismEllen Terry photographed in 1864 by Julia Margaret Cameron
Julia Margaret Cameron (11 June 1815 – 26 January 1879) was a British photographer. She became known for her portraits of celebrities of the time, and for photographs with Arthurian and other legendary themes.
Cameron's photographic career was short, spanning eleven years of her life (1864-1875). She took up photography at the relatively late age of 48, when she was given a camera as a present.[1] Her work had a huge impact on the development of modern photography, especially her closely cropped portraits which are still mimicked today. Her house, Dimbola Lodge, on the Isle of Wight is open to the public.
ImagismRobinson's Fading Away (1858)
Henry Peach Robinson (9 July 1830 in Ludlow, Shropshire – 21 February 1901) was an English Pictorialist photographer best known for his pioneering combination printing - joining multiple negatives to form a single image, the precursor to photomontage. Oscar Gustave Rejlander of Wolverhampton was however, the first to establish this art in 1857, a year earlier than Robinson.
ImagismOscar Gustave Rejlander (Sweden 1813 – Clapham, London on 18 January 1875) was a pioneering Victorian art photographer.
Documentary photographyBandit's Roost by Jacob Riis, 1888, from How the Other Half Lives. This image is Bandit's Roost at 59½ Mulberry Street, considered the most crime-ridden, dangerous part of New York City.
PhotojournalismThe home of a Rebel Sharpshooter, Gettysburg (1863)
http://en.wikipedia.org/wiki/Photo_journalism#Golden_age
Alexander Gardner (October 17, 1821 – December 10, 1882) was a Scottish and American photographer. He is best known for his photographs of the American Civil War, American President Abraham Lincoln, and the execution of the conspirators to Lincoln's assassination.
StereoscopyPocket stereoscope with original test image. Used by military to examine stereoscopic pairs of aerial photographs.
StereoscopyMichelle Obama and Barack Obama and their party watch the commercials using ColorCode 3D during Super Bowl XLIII on February 1, 2009 in the White House theatre.
StereoscopyMany 3D displays use this method to convey images. It was first invented by Sir Charles Wheatstone in 1840.[2] Stereoscopy is used in photogrammetry and also for entertainment through the production of stereograms. Stereoscopy is useful in viewing images rendered from large multi-dimensional data sets such as are produced by experimental data. Modern industrial three dimensional photography may use 3D scanners to detect and record 3 dimensional information.[3] The three-dimensional depth information can be reconstructed from two images using a computer by corresponding the pixels in the left and right images. Solving the Correspondence problem in the field of Computer Vision aims to create meaningful depth information from two images.
Timothy H. O'SullivanAncient ruins in the Cañon de Chelle 1873
http://en.wikipedia.org/wiki/Timothy_H.O'Sullivan
Timothy H. O'Sullivan (c. 1840 – January 14, 1882) was a photographer prominent for his work on subjects in the American Civil War and the Western United States. "The Harvest of Death": Union dead on the battlefield at Gettysburg, Pennsylvania, photographed July 5–6, 1863, by Timothy O'Sullivan
starting the portrait photography from 1850...Félix Nadar (1820-1910); French actress Sarah Bernhardt (1844-1923) around 1864.
"Boulevard du Temple", taken by Louis Daguerre in late 1838 or early 1839 in Paris, was the first photograph of a person. The image shows a street, but because exposure time was over ten minutes, the traffic was moving too much to appear. The exception is the man at the bottom left, who stood still getting his boots polished long enough to show.
Nicéphore Niépce's earliest surviving photograph of a scene from nature taken with a camera obscura,View from the Window at Le Gras (1826)
First known surviving heliographic engraving, made by Joseph Nicéphore Niépce in 1825 by contact under an engraving with the "heliographic process".[3] This seminal work has been a step towards the first permanent photography from nature taken with a camera obscura, in 1826.
