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Double Exposure
In photography and cinematography, a multiple exposure is the superimposition of two or more exposures to create a single image, and double exposure has a corresponding meaning in respect of two images. The exposure values may or may not be identical to each other. Overview Ordinarily, cameras have a sensitivity to light that is a function of time. For example, a one-second exposure is an exposure in which the camera image is equally responsive to light over the exposure time of one second. The criterion for determining that something is a double exposure is that the sensitivity goes up and then back down. The simplest example of a multiple exposure is a double exposure without flash, i.e. two partial exposures are made and then combined into one complete exposure. Some single exposures, such as "flash and blur" use a combination of electronic flash and ambient exposure. This effect can be approximated by a Dirac delta measure (flash) and a constant finite rectangular window, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wide Dynamic Range
In photography and videography, multi-exposure HDR capture is a technique that creates extended or high dynamic range (HDR) images by taking and combining multiple exposures of the same subject matter at different Exposure (photography), exposure levels. Combining multiple images in this way results in an image with a greater dynamic range than what would be possible by taking one single image. The technique can also be used to capture video by taking and combining multiple exposures for each frame of the video. The term "HDR" is used frequently to refer to the process of creating HDR images from multiple exposures. Many smartphones have an automated HDR feature that relies on computational imaging techniques to capture and combine multiple exposures. A single image captured by a camera provides a finite range of Luminosity function, luminosity inherent to the medium, whether it is a digital sensor or film. Outside this range, tonal information is lost and no features are visibl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Film Scanner
A film scanner is a device made for scanning photographic film directly into a computer without the use of any intermediate printmaking. It provides several benefits over using a flatbed scanner to scan in a print of any size: the photographer has direct control over cropping and aspect ratio from the original, unmolested image on film; and many film scanners have special software or hardware that removes scratches and film grain and improves color reproduction from film. Film scanners can accept either strips of 35 mm or 120 film, or individual slides. Low-end scanners typically only take 35mm film strips, while medium- and high-end film scanners often have interchangeable film loaders. This allows the one scanning platform to be used for different sizes and packaging. For example, some allow microscope slides to be loaded for scanning, while mechanised slide loaders allow many individual slides to be batch scanned unattended. Some software used to process images scanned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exponential Decay
A quantity is subject to exponential decay if it decreases at a rate proportional to its current value. Symbolically, this process can be expressed by the following differential equation, where is the quantity and (lambda) is a positive rate called the exponential decay constant, disintegration constant, rate constant, or transformation constant: :\frac = -\lambda N. The solution to this equation (see derivation below) is: :N(t) = N_0 e^, where is the quantity at time , is the initial quantity, that is, the quantity at time . Measuring rates of decay Mean lifetime If the decaying quantity, ''N''(''t''), is the number of discrete elements in a certain set, it is possible to compute the average length of time that an element remains in the set. This is called the mean lifetime (or simply the lifetime), where the exponential time constant, \tau, relates to the decay rate constant, λ, in the following way: :\tau = \frac. The mean lifetime can be looked at as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ian Hornak
Ian Hornak (January 9, 1944 – December 9, 2002) was an American draughtsman, painter and printmaker. He was one of the founding artists of the Hyperrealist and Photorealist fine art movements; credited with having been the first Photorealist artist to incorporate the effect of multiple exposure photography into his landscape paintings; and the first contemporary artist to entirely expand the imagery of his primary paintings onto the frames.Joan Adan, Eric Ian Hornak Spoutz, "Transparent Barricades: Ian Hornak, A Retrospective," exhibition catalogue, Forest Lawn Museum, Glendale, California, May 2012Stephen Bennett Phillips, Eric Ian Hornak Spoutz, "Ian Hornak Transparent Barricades," exhibition catalogue, Board of Governors of the Federal Reserve System, Fine Art Program, Washington D.C., 2012 Early life and education Ian Hornak was born on January 9, 1944, in Philadelphia, Pennsylvania, to Slovakian immigrants, Frank and Rose Hornak (née Vagich). Following Hornak’s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artsy
Artsy, formally known as Art.sy Inc is a New York City based online art brokerage. Its main business is developing and hosting website for numerous galleries as well as selling art for them. It utilizes a search engine and database to draw connections and map relationships among works of art. The brokerage was founded by Carter Cleveland, a Princeton University computer science graduate. It is currently led by Mike Steib, a former CEO of XO Group, the parent company of The Knot. Artsy has received financial backing from multiple investors. History Carter Cleveland, the son of an art historian, founded Artsy during his senior year at Princeton University and worked on the site from his dorm room. Cleveland's goal was for the site to serve as a place where users could discover art online. In May 2010, Artsy participated in the New York City conference, TechCrunch Disrupt, where they competed in the Startup Battlefield and received the Yahoo! Rookie Award! A yea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joan Semmel
Joan Semmel (born October 19, 1932) is an American feminist painter, professor, and writer. She is best known for her large scale realistic nude self portraits as seen from her perspective looking down. Education and political involvement Semmel was born in New York City. She began her artistic training at Cooper Union, where she studied under Nicholas Marsicano. She went on to study with Morris Kantor at the Art Students League of New York before earning a BFA from the Pratt Institute in 1963. She spent seven and a half years in Spain (1963–1970), where her work, "gradually developed from broad gestural and spatially referenced painting to compositions of a somewhat surreal figure/ground composition...(her) highly saturated brilliant color separated (her) paintings from the leading Spanish artists whose work was darker, grayer and Goyaesque." Semmel returned to New York City in 1970 and earned an MFA from the Pratt Institute in 1972. Upon returning to New York in 1970, Semme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fine Art
In European academic traditions, fine art is developed primarily for aesthetics or creative expression, distinguishing it from decorative art or applied art, which also has to serve some practical function, such as pottery or most metalwork. In the aesthetic theories developed in the Italian Renaissance, the highest art was that which allowed the full expression and display of the artist's imagination, unrestricted by any of the practical considerations involved in, say, making and decorating a teapot. It was also considered important that making the artwork did not involve dividing the work between different individuals with specialized skills, as might be necessary with a piece of furniture, for example. Even within the fine arts, there was a hierarchy of genres based on the amount of creative imagination required, with history painting placed higher than still life. Historically, the five main fine arts were painting, sculpture, architecture, music, and poetry, with p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-dynamic-range Imaging
In photography and videography, multi-exposure HDR capture is a technique that creates extended or high dynamic range (HDR) images by taking and combining multiple exposures of the same subject matter at different exposure levels. Combining multiple images in this way results in an image with a greater dynamic range than what would be possible by taking one single image. The technique can also be used to capture video by taking and combining multiple exposures for each frame of the video. The term "HDR" is used frequently to refer to the process of creating HDR images from multiple exposures. Many smartphones have an automated HDR feature that relies on computational imaging techniques to capture and combine multiple exposures. A single image captured by a camera provides a finite range of luminosity inherent to the medium, whether it is a digital sensor or film. Outside this range, tonal information is lost and no features are visible; tones that exceed the range are "burned o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Camera
Bridge cameras are cameras that fill the niche between relatively simple point-and-shoot cameras and interchangeable-lens cameras such as mirrorless cameras and single-lens reflex cameras (SLRs). They are often comparable in size and weight to the smallest digital SLRs (DSLR), but lack interchangeable lenses, and almost all digital bridge cameras lack an optical viewfinder system. The phrase "bridge camera" has been in use at least since the 1980s, and continues to be used with digital cameras. The term was originally used to refer to film cameras which "bridged the gap" between point-and-shoot cameras and SLRs. Like other cameras, most current bridge cameras are digital. These cameras typically feature full manual controls over shutter speed, aperture, ISO sensitivity, color balance and metering. Generally, their feature sets are similar to consumer DSLRs, except for a smaller range of ISO sensitivity because of their typically smaller image sensor. Many bridge cameras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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