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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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Camera
A bridge camera is a type of camera that fills 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 b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reversal Film
In photography, reversal film or slide film is a type of photographic film that produces a positive image on a transparent base. Instead of negatives and prints, reversal film is processed to produce transparencies or diapositives (abbreviated as "diafilm" or "dia" in some languages like German, Romanian or Hungarian). Reversal film is produced in various sizes, from 35 mm to roll film to 8×10 inch sheet film. A slide is a specially mounted individual transparency intended for projection onto a screen using a slide projector. This allows the photograph to be viewed by a large audience at once. The most common form is the 35 mm slide, with the image framed in a 2×2 inch cardboard or plastic mount. Some specialized labs produce photographic slides from digital camera images in formats such as JPEG, from computer-generated presentation graphics, and from a wide variety of physical source material such as fingerprints, microscopic sections, paper documents, astr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross Processing
Cross processing (sometimes abbreviated to Xpro) is the deliberate processing of photographic film in a chemical solution intended for a different type of film. The effect was discovered independently by many different photographers often by mistake in the days of C-22 and E-4. Color cross processed photographs are often characterized by unnatural colors and high contrast. The results of cross processing differ from case to case, as the results are determined by many factors such as the make and type of the film used, the amount of light exposed onto the film and the chemical used to develop the film. Cross processing has been used in a variety of photographic and cinematographic practices, most notably rising in popularity during the 1990s. Similar effects can also be achieved with digital filter effects. Processes Analogue Cross processing usually involves one of the two following methods. * Processing positive color reversal film in C-41 chemicals, resulting in a ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lomography
Lomography, or simply lomo, is a photographic style which involves taking spontaneous photographs with minimal attention to technical details. Lomographic images often exploit the unpredictable, non-standard optical traits of toy cameras (such as light leaks and irregular lens alignment), and non-standard film processing techniques for aesthetic effect. Similar-looking techniques with digital photography, often involving "lomo" image filters in post-processing, may also be considered lomographic. "Lomography" is claimed as a commercial trademark by Lomographische GmbH. However, it has become a genericised trademark; most camera phone photo editor mobile app, apps include a "lomo" photographic filter, filter. History While cheap plastic toy cameras using film often used in lomography were and are produced by multiple manufacturers, Lomography is named after the Soviet-era cameras produced by Leningradskoye Optiko-Mekhanicheskoye Obyedinenie, Leningradskoye Optiko-Mekhanicheskoy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SilverFast
SilverFast is a family of software for image scanning and processing, including photos, documents and slides, developed by LaserSoft Imaging. There are also other applications for image processing using digital cameras or printers and for 48-bit raw data image processing. History SilverFast was introduced in 1995, it is still under development today. Some scanner manufacturers bundle their hardware with SilverFast software. Some of the features developed for SilverFast, especially in the area of color management, error detection and automatic dust and scratch removal, have been patented. The European Digital Press Association named SilverFast the "Best colour management software of the year 2008" for improving the dynamic range of most scanners and for creating ICC profiles automatically. In 2011 version 8 was introduced, and HDR imaging software followed in 2012. SilverFast 9 has been released in 2020. Patents * 2005: Patent granted on barcode technology used for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VueScan
VueScan is a computer program for image scanning, especially of photographs, including negatives. It supports optical character recognition (OCR) of text documents. The software can be downloaded and used free of charge, but adds a watermark on scans until a license is purchased. Purpose VueScan is intended to work with a large number of image scanners, excluding specialised professional scanners such as drum scanners, on many computer operating systems (OS), even if drivers for the scanner are not available for the OS. These scanners are supplied with device drivers and software to operate them, included in their price. A 2014 review considered that the reasons to purchase VueScan are to allow older scanners not supported by drivers for newer operating systems to be used in more up-to-date systems and for better scanning and processing of photographs (prints; also slides and negatives when supported by scanners) than is afforded by manufacturers' software. The review did not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wide Dynamic Range
In photography and videography, multi-exposure HDR capture is a technique that creates high dynamic range (HDR) images (or extended dynamic range images) by taking and combining multiple exposures of the same subject matter at different Exposure (photography), exposures. 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 fea ... [...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 scann ... [...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 Lambda (; uppercase , lowercase ; , ''lám(b)da'') is the eleventh letter of the Greek alphabet, representing the voiced alveolar lateral approximant . In the system of Greek numerals, lambda has a value of 30. Lambda is derived from the Phoen ...) is a positive rate called the exponential decay constant, disintegration constant, rate constant, or transformation constant: :\frac = -\lambda N(t). The solution to this equation (see #Solution_of_the_differential_equation, 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 (mathematics), se ... [...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’ ... [...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 Jeffrey Yin, who was appointed CEO in June 2024. 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 year later, the team demoed Artsy at the Beyeler Foundation at Art Basel (June 15, 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
