Portal:Photography
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The first photograph was an image produced in 1826 by the French inventor Nicéphore Niépce on a polished pewter plate covered with a petroleum derivative called bitumen of Judea. But for centuries images had been projected onto surfaces - artists used the camera obscura and camera lucida to trace scenes as early as the 16th century. These early "cameras" did not fix an image, but only projected images from an opening in the wall of a darkened room onto a surface, turning the room into a large pinhole camera.
The advent of photography, from the Ancient Greek words φως phos ("light"), and γραφη graphê ("stylus", "paintbrush") or γραφω graphō (the verb, "I write/draw"), together meaning "drawing with light" or "representation by means of lines" or "drawing", has gained the interest of scientists and artists from its inception. Scientists have used photography to record and study movements, such as Eadweard Muybridge's study of human and animal locomotion (1887). Artists are equally interested in these aspects but also try to explore avenues other than the photo-mechanical representation of reality, such as the pictorialist movement. Military, police and security forces use photography for surveillance, recognition and data storage. Photography is used to preserve favorite memories and as a source of entertainment.
A long exposure is used in this photograph to smooth the flow of water from the waterfall and to create a sense of peace and tranquility. Photo Credit: Diliff
Brady's efforts to document the Civil War on a grand scale by bringing his photographic studio right onto the battlefields earned Brady his place in history. Despite the obvious dangers, financial risk, and discouragement of his friends he is later quoted as saying "I had to go. A spirit in my feet said 'Go,' and I went." His first popular photographs of the conflict were at the First Battle of Bull Run, in which he got so close to the action that he only just avoided being captured.
References
- ^ Most sources give January 15, 1896 as Brady's day of death. Panzer (1997, p. xxii) lists January 16.
- ...that the first photograph was an image produced in 1826 by the French inventor Nicéphore Niépce on a polished pewter plate covered with a petroleum derivative called bitumen of Judea?
- ...that the inventors of Kodachrome, Leopold Mannes and Leopold Godowsky, Jr. were both accomplished musicians?
| “ | There must be some one quality without which a work of art cannot exist; possessing which, in the least degree, no work is altogether worthless. What is this quality? What quality is shared by all objects that provoke our aesthetic emotions? What quality is common to Sta. Sophia and the windows at Chartres, Mexican sculpture, a Persian bowl, Chinese carpets, Giotto's frescoes at Padua, and the masterpieces of Poussin, Piero della Francesca, and Cezanne? Only one answer seems possible - significant form. In each, lines and colors combined in a particular way, certain forms and relations of forms, stir our aesthetic emotions. | ” |
Information stored in high dynamic range images usually corresponds to the physical values of luminance or radiance that can be observed in the real world. This is different from traditional digital images, which represent colors that should appear on a monitor or a paper print. Therefore, HDR image formats are often called "scene-referred", in contrast to traditional digital images, which are "device-referred" or "output-referred". Furthermore, traditional images are usually encoded for the human visual system (maximizing the visual information stored in the fixed number of bits), which is usually called "gamma encoding" or "gamma correction". The values stored for HDR images are often linear, which means that they represent relative or absolute values of radiance or luminance (gamma 1.0).
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