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Solarisation
The Sabatier effect, also known as pseudo-solarization (or pseudo-solarisation) and erroneously referred to as the Sabattier effect, is a phenomenon in photography in which the image recorded on a Negative (photography), negative or on a photographic print is wholly or partially reversed in tone. Dark areas appear light or light areas appear dark. Solarization (photography), Solarization and pseudo-solarization are quite distinct effects. Over time, the "pseudo" has been dropped in many photographic darkroom circles and discussions, but the effect that is meant is the Sabattier effect and not the solarization by extreme overexposure. Background Initially, the term "solarization (photography), solarization" was used to describe the effect observed in cases of extreme overexposure of the photographic film or plate in the camera. The effect generated in the dark room was then called ''pseudo-solarization''. Spencer defines the Sabattier effect as: "Partial image reversal produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solarization (photography)
In photography, solarization is the effect of ''tone reversal'' observed in cases of extreme Exposure (photography), overexposure of the photographic film in the camera. Most likely, the effect was first observed in scenery photographs including the sun. The sun, instead of being the whitest spot in the image, turned black or grey. For instance, Minor White's photograph of a winter scene, ''The Black Sun 1955'', was a result of the shutter of his camera freezing in the open position, producing severe overexposure. Ansel Adams had also earlier created a solarized sun image, titled ''Black Sun, Owens Valley, California, 1939'', by overexposure. Definition When a photographic layer, suitable for solarization (see below), is exposed to Actinism, actinic radiation, the resulting darkening after development will not increase steadily, but reaches a maximum which decreases under more intense exposure. In general the phenomenon is only then called solarization if the exposure has been pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lee Miller
Elizabeth "Lee" Miller, Lady Penrose (April 23, 1907 – July 21, 1977), was an American photographer and photojournalist. Miller was a fashion model in New York City in the 1920s before going to Paris, becoming a fashion and fine-art photographer there. During World War II, she was a war correspondent for '' Vogue'', covering events such as the London Blitz, the liberation of Paris and the concentration camps at Buchenwald and Dachau. Her reputation as an artist in her own right is due mostly to her son's discovery and promotion of her work as a fashion and war photographer. Early life and education Miller was born on April 23, 1907, in Poughkeepsie, New York. Her parents were Theodore and Florence Miller (née MacDonald). Her father was of German descent, and her mother was of Scottish and Irish descent. She had a younger brother named Erik, and her older brother was the aviator Johnny Miller. Theodore always favored Lee, and often used her as a model for his amateur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armand Sabatier
Armand Sabatier (, , ; 13 January 1834 – 22 December 1910) was a French zoologist known for his studies of comparative anatomy of animals, and for his work in photography, discovering and publishing in 1860 the Sabattier effect, also known as pseudo-solarisation. He studied in Montpellier, where he took special mathematics courses in high school, then enrolled in medicine. He then did three years of internship in Lyon, then returned to Montpellier, where he defended in 1863 his doctoral thesis of medicine, entitled "Anatomical, physiological and clinical study on pulmonary auscultation in children".. He married Laure Gervais de Rouville and they had a daughter, Jeanne. During the Franco-Prussian War of 1870 he was surgeon in charge of the ambulances of the South. After the war, he prepared his doctorate of sciences, which he obtained in 1873, after defending his thesis entitled "The heart and the central circulation of the vertebrates". He was appointed professor and chair of z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incandescent Light Bulb
An incandescent light bulb, also known as an incandescent lamp or incandescent light globe, is an electric light that produces illumination by Joule heating a #Filament, filament until it incandescence, glows. The filament is enclosed in a glass bulb that is either vacuum, evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires embedded in the glass. A bulb socket provides mechanical support and electrical connections. Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts. They require no external Regulator (automatic control), regulating equipment, have low manufacturing costs, and work equally well on either alternating current or direct current. As a result, the incandescent bulb became widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photographic Techniques
Photography is the art, application, and practice of creating images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing (e.g., photolithography), and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication. A person who operates a camera to capture or take photographs is called a photographer, while the captured image, also known as a photograph, is the result produced by the camera. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiritual Tree Dsc06786 Duo Nevit
Spiritual is the adjective for the noun "spirit" ( animating force or supernatural entity). Spiritual may also refer to: Religion *Spirituality, the quality or state of being spiritual, traditionally referring to a religious process of re-formation that "aims to recover the original shape of man" ** Spiritual activism, a practice that brings together the otherworldly and inward-focused work of spirituality and the worldly and outwardly-focused work of activism **Spiritual attack, an attack by Satan and his demons on a Christian **Spiritual body, a Christian concept **Spiritual but not religious, a religious classification **Spiritual bypass, a tendency to use spiritual ideas and practices to sidestep or avoid facing unresolved emotional issues, psychological wounds, and unfinished developmental tasks ** Spiritual communion, a Christian practice of desiring union with Jesus Christ in the Eucharist **Spiritual crisis, a form of identity crisis where an individual experiences drasti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoshop
Adobe Photoshop is a raster graphics editor developed and published by Adobe for Windows and macOS. It was created in 1987 by Thomas and John Knoll. It is the most used tool for professional digital art, especially in raster graphics editing, and its name has become genericised as a verb (e.g. "to photoshop an image", " photoshopping", and " photoshop contest") although Adobe disapproves of such use. Photoshop can edit and compose raster images in multiple layers and supports masks, alpha compositing and several color models. Photoshop uses its own PSD and PSB file formats to support these features. In addition to raster graphics, Photoshop has limited abilities to edit or render text and vector graphics (especially through clipping path for the latter), as well as 3D graphics and video. Its feature set can be expanded by plug-ins; programs developed and distributed independently of Photoshop that run inside it and offer new or enhanced features. Photoshop's naming sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CLUT
In computer graphics, a palette is the set of available colors from which an image can be made. In some systems, the palette is fixed by the hardware design, and in others it is dynamic, typically implemented via a color lookup table (CLUT), a correspondence table in which selected colors from a certain color space's color reproduction range are assigned an index, by which they can be referenced. By referencing the colors via an index, which takes less information than needed to describe the actual colors in the color space, this technique aims to reduce data usage, including processing, transfer bandwidth, RAM usage, and storage. Images in which colors are indicated by references to a CLUT are called indexed color images. Description As of 2019, the most common image colorspace in graphics cards is the RGB color model with 8 bits per pixel color depth. Using this technique, 8 bits per pixel are used to describe the luminance level in each of the RGB channels, therefore 24 bit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video Synthesizer
A video synthesizer is a device that electronically creates a video signal. A video synthesizer is able to generate a variety of visual material without camera input through the use of internal video pattern generators. It can also accept and "clean up and enhance" or "distort" live television camera imagery. The synthesizer creates a wide range of imagery through purely electronic manipulations. This imagery is visible within the output video signal when this signal is displayed. The output video signal can be viewed on a wide range of conventional video equipment, such as TV monitors, theater video projectors, computer displays, etc. Video pattern generators may produce static or moving or evolving imagery. Examples include geometric patterns (in 2D or 3D), subtitle text characters in a particular font, or weather maps. Imagery from TV cameras can be altered in color or geometrically scaled, tilted, wrapped around objects, and otherwise manipulated. A particular video synth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agfacontour Professional
Agfacontour Professional was (as of 2002 not anymore produced) a special emulsion sheet film which, after exposure and development in the Agfacontour developer, produced direct equidensities. Agfacontour was introduced in 1970 by Agfa-Gevaert to produce equidensities by a direct, one-developing-step process. Until then equidensities had to be obtained using one of the following techniques: *The most popular method to obtain equidensities was the ''One-Film'' technique, better known as Sabattier effect (a.k.a. Pseudosolarization). *Another technique, making tonal extractions on high-contrast film, was called the ''Two-Film'' technique (negative-positive process): from a negative 3-5 different exposures were made on ultra high-contrast lith-films. These 3-5 positives were then copied again on ultra high-contrast lith-film to obtain negatives with virtually no grey tones. Then one positive and a negative from a different set were sandwiched together in register to obtain one sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agfa-Gevaert
Agfa-Gevaert N.V. (Agfa) is a Belgian-German multinational corporation that develops, manufactures, and distributes analogue and digital imaging products, software, and systems. The company began as a dye manufacturer in 1867. In 1925, the company merged with several other German chemical companies to become chemicals giant IG Farben. IG Farben would go on to play major role in the economy of Nazi Germany. It extensively employed forced labour during the Nazi period, and produced Zyklon B poison gas used in the Holocaust. IG Farben was disestablished by the Allies in 1945. AGFA was reconstituted (as a subsidiary of Bayer) from the remnants of IG Farben in 1952. Agfa photographic film and cameras were once prominent consumer products. In 2004, the consumer imaging division was sold to a company founded via management buyout. AgfaPhoto GmbH, as the new company was called, filed for bankruptcy after a year, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
