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Tuesday, July 17, 2012

Digital photography

Traditional photography, it is difficult for photographers working at remote locations without access to treatment facilities, and competition from television news photographers to deliver images to newspapers with greater speed. Photojournalists in remote locations often carried
miniature laboratories of photos and a means of transmitting images through telephone lines. In 1981, Sony unveiled the first consumer camera to use a charge-coupled device imaging, eliminating the need for film: the Sony Mavica. While the Mavica saved images to disk, the images shown on television, and the camera was not fully digital. In 1991, Kodak unveiled the DCS 100, the first digital SLR on the market. Despite its high cost prevents any purpose other than photojournalism and professional photography, commercial digital photography was born.
Digital imaging uses an electronic image sensor to record the image as a set of electronic data rather than as chemical changes on film. The main difference between digital and chemical photography is that chemical photography resists manipulation because it is photo film and photo paper, while digital imaging is a highly manipulative. This difference allows a degree of post-image processing that is comparatively difficult in film-based photography and permits different communication and possible applications.
Digital imaging has raised ethical concerns because of the ease of manipulating digital photographs in post processing. Many photojournalists have declared they will not crop your images, or forbidden to combine elements of several photos of "collages", becoming a "real" photos. Today, technology has made picture editing relatively simple even for novice photographers. However, recent changes in the camera allows the processing of digital images of fingerprints to detect tampering with the purpose of forensic photography.
Digital camera point and shoot have become consumer products, outselling cameras, including new features such as recording video and audio. Kodak announced in January 2004 that sell rechargeable 35mm cameras in western Europe, Canada and the United States after the end of this year. Kodak was at that time a minor player in the market for film cameras battery. In January 2006, Nikon followed suit and announced that it will cease production of all but two models of their cameras: the low-end Nikon FM10, and high-end Nikon F6. May 25, 2006, Canon has announced it will stop developing new film SLR cameras. Although most new models of digital cameras are now a new medium format camera 6x6cm/6x7cm was introduced in 2008 in a cooperation between Fuji and Voigtländer.
According to a survey conducted by Kodak in 2007, when most of digital photography and was 75 percent of professional photographers say they will continue to use film, even though some embrace digital.
According to survey results from the United States, more than two thirds (68 percent) of professional photographers prefer the results of the film to digital for certain applications, including:
• Cinema of the superiority in capturing more information about the film medium and large format (48 percent);
• creating a traditional photographic look (48 percent);
• Capture the details in shadows and highlights (45 percent);
• The wide exposure latitude of film (42 percent), and
• File (38 percent)
"The photograph of the light field"
Numerical methods for image capture and processing of visualization have enabled the new technology of "Light field photography" (also known as Synthetic Aperture photography). This process allows the different depths of field to be selected after the photo was captured. As explained by Michael Faraday in 1846, the "light field" means that the five dimensions at each point in the 3-D space with attributes of more than two angles that define the direction of each ray passing Through this point. These vectors can be captured additional attributes optically by use of microlenses to each pixel point in the image sensor in two dimensions. Each pixel of the final image is actually selected for each subnet located under each microlens, as identified by an algorithm for image capture post-objective.