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91-471: A photograph (also known as a photo , image , or picture ) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor , such as a CCD or a CMOS chip. Most photographs are now created using a smartphone or camera , which uses a lens to focus the scene's visible wavelengths of light into a reproduction of what the human eye would see. The process and practice of creating such images

182-466: A cathode-ray tube . A fixed image , also called a hard copy , is one that has been recorded on a material object, such as paper or textile . A mental image exists in an individual's mind as something one remembers or imagines. The subject of an image does not need to be real; it may be an abstract concept such as a graph or function or an imaginary entity. For a mental image to be understood outside of an individual's mind, however, there must be

273-800: A positive image, the negative is most commonly transferred (' printed ') onto photographic paper . Printing the negative onto transparent film stock is used to manufacture motion picture films. Alternatively, the film is processed to invert the negative image, yielding positive transparency . Such positive images are usually mounted in frames, called slides. Before recent advances in digital photography, transparencies were widely used by professionals because of their sharpness and accuracy of color rendition. Most photographs published in magazines were taken on color transparency film. Originally, all photographs were monochromatic or hand-painted in color. Although methods for developing color photos were available as early as 1861, they did not become widely available until

364-476: A "cult" value as an example of artistic beauty. Following years of various reproductions of the painting, the portrait's "cult" status has little to do with its original subject or the artistry. It has become famous for being famous, while at the same time, its recognizability has made it a subject to be copied, manipulated, satirized, or otherwise altered in forms ranging from Marcel Duchamp's L.H.O.O.Q . to Andy Warhol 's multiple silk-screened reproductions of

455-436: A (usually) male viewer. The documentary film scholar Bill Nichols has also studied how apparently "objective" photographs and films still encode assumptions about their subjects. Images perpetuated in public education, media, and popular culture have a profound impact on the formation of such mental images: What makes them so powerful is that they circumvent the faculties of the conscious mind but, instead, directly target

546-405: A 500-watt bulb were typical) and could visibly "fry" the plate if continued for more than two or three minutes, causing serious damage to the color. Many surviving Autochromes suffer from such "tanning" and conventional projection is not a recommended means of displaying these irreplaceable images today. However, a projector-like optical system (i.e., using condenser lenses for illumination, with

637-439: A camera, the daguerreotype , after himself. Its existence was announced to the world on 7 January 1839, but working details were not made public until 19 August that year. Other inventors soon made drastic improvements that reduced the required amount of exposure time from a few minutes to just a few seconds, making portrait photography truly practical and widely popular during this time. The daguerreotype had shortcomings, notably

728-857: A career out of taking pictures of "ghosts" or "spirits". There are many instances where people believe photos will bring bad luck either to the person taking the picture or people captured in the photo. For instance, a photograph taken of a pregnant woman will bring bad luck to the baby in the womb and photos taken of dead people will ensure that person is not successful in the afterlife. The production or distribution of certain types of photograph has been forbidden under modern laws, such as those of government buildings, highly classified regions, private property, copyrighted works, children's genitalia , child pornography and less commonly pornography overall. These laws vary greatly between jurisdictions. In some public property owned by government, such as law courts, government buildings, libraries, civic centres and some of

819-640: A chapter on how this process worked. In the early 1900s Ethel Standiford-Mehling was an experimental photographer and artist and owner of the Standiford Studio in Louisville, Kentucky. She was commissioned by Louisville artist and art patron Eleanor Belknap Humphrey to create an autochrome diascope of her two oldest children. Both the autochrome photograph of the Humphrey children and the diascope mirror viewing device, which closes into itself in

910-410: A collection of over 700 autochromes by Stephen Pegler . This includes a collection of over 100 plates purchased by the museum in 2017 thanks to the generosity of local individuals and organisations. The images cover a range of subjects from still lifes, posed studies, local people and landscapes, and his travels abroad, and were taken between 1910 and the early 1930s. The Pegler collection of autochromes

1001-502: A color system based on red, green, and blue is used to copy an image that exists within the red-orange, green, and blue-violet system, providing further opportunities for color degradation. Vintage reproductions of Autochromes in old books and magazines have often been noticeably hand-adjusted by the photoengravers in an effort to compensate for some of the difficulties of reproduction, and as a result, they sometimes look more like hand-colored photographs than "natural color" ones. In short, it

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1092-428: A combination of both methods. A two-dimensional image does not need to use the entire visual system to be a visual representation. An example of this is a grayscale ("black and white") image, which uses the visual system's sensitivity to brightness across all wavelengths without taking into account different colors. A black-and-white visual representation of something is still an image, even though it does not fully use

1183-578: A cultural advancement because of photography. People thrive off of the selfies of their favorite celebrities, many receive millions of likes on social media because of one simple selfie. Ideal photograph storage involves placing each photo in an individual folder constructed from buffered, or acid-free paper . Buffered paper folders are especially recommended in cases when a photograph was previously mounted onto poor quality material or using an adhesive that will lead to even more acid creation. Store photographs measuring 8x10 inches or smaller vertically along

1274-455: A form of record-keeping; as an element of spiritual, religious, or magical practice; or even as a form of communication. Early writing systems , including hieroglyphics , ideographic writing, and even the Roman alphabet , owe their origins in some respects to pictorial representations. Images of any type may convey different meanings and sensations for individual viewers, regardless of whether

1365-401: A fraction of a second. The traditional standard for the display of individual frames by a motion picture projector has been 24 frames per second (FPS) since at least the commercial introduction of "talking pictures" in the late 1920s, which necessitated a standard for synchronizing images and sounds. Even in electronic formats such as television and digital image displays, the apparent "motion"

1456-528: A laboratory curiosity. It first became a widespread commercial reality with the introduction of Autochrome plates in 1907, but the plates were very expensive and not suitable for casual snapshot-taking with hand-held cameras. The mid-1930s saw the introduction of Kodachrome and Agfacolor Neu , the first easy-to-use color films of the modern multi-layer chromogenic type. These early processes produced transparencies for use in slide projectors and viewing devices, but color prints became increasingly popular after

1547-454: A leather-bound case similar in size and appearance to a book, are well preserved and still viewable in 2015. Ethel Standiford-Mehling later moved her Louisville enterprise Standiford Studios to Cleveland, Ohio, and it is not known if any other examples of her autochrome diascopes still exist. Vladimír Jindřich Bufka was a pioneer and popularizer of Autochrome in Bohemia . There has been

1638-414: A little, this can break down the emulsion . The very nature of enclosing a photograph in plastic encourages users to pick it up; users tend to handle plastic enclosed photographs less gently than non-enclosed photographs, simply because they feel the plastic enclosure makes the photo impervious to all mishandling. As long as a photo is in its folder, there is no need to touch it; simply remove the folder from

1729-593: A public place. Persistent and aggressive photography of a single individual may come under the legal definition of harassment . A right to privacy came into existence in UK law as a consequence of the incorporation of the European Convention on Human Rights into domestic law through the Human Rights Act 1998 . This can result in restrictions on the publication of photography. Image In

1820-520: A real-world scene, made using a camera obscura , followed a few years later at Le Gras, France, in 1826, but Niépce's process was not sensitive enough to be practical for that application: a camera exposure lasting for hours or days was required. In 1829, Niépce entered into a partnership with Louis Daguerre , and the two collaborated to work out a similar, but more sensitive, and otherwise improved process. After Niépce's death in 1833, Daguerre concentrated on silver halide -based alternatives. He exposed

1911-406: A silver-plated copper sheet to iodine vapor, creating a layer of light-sensitive silver iodide ; exposed it in the camera for a few minutes; developed the resulting invisible latent image to visibility with mercury fumes; then bathed the plate in a hot salt solution to remove the remaining silver iodide, making the results light-fast. He named this first practical process for making photographs with

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2002-427: A three ring binder. Stacking the photos horizontally within a flat box will greatly reduce ease of access, and binders leave three sides of the photo exposed to the effects of light and do not support the photograph evenly on both sides, leading to slumping and bending within the binder. The plastic used for enclosures has been manufactured to be as frictionless as possible to prevent scratching photos during insertion to

2093-416: A viewing lens in place of the projection lens), employing daylight (not direct sunlight) for the light source, can produce comparably excellent visual results—although for only one viewer at a time—without the hazards of actual projection. The use of a "light box" or similar highly diffused artificial light source for viewing Autochromes, can damage the plates as the heavy scattering of light within and among

2184-510: A way of conveying that mental image through the words or visual productions of the subject. The broader sense of the word 'image' also encompasses any two-dimensional figure, such as a map , graph , pie chart , painting , or banner . In this wider sense, images can also be rendered manually, such as by drawing , the art of painting, or the graphic arts (such as lithography or etching ). Additionally, images can be rendered automatically through printing , computer graphics technology, or

2275-490: A well-designed preservation plan. If an Autochrome was well made and has been well preserved, color values can be very good. The dyed starch grains are somewhat coarse, giving a hazy, pointillist effect, with faint stray colors often visible, especially in open light areas such as skies. The smaller the image, the more noticeable these effects are. Autochrome has been touted as "the colour of dreams." The resulting "dream-like" impressionist quality may have been one reason behind

2366-402: Is a single static image. This phrase is used in photography, visual media , and the computer industry to emphasize that one is not talking about movies, or in very precise or pedantic technical writing such as a standard . A moving image is typically a movie ( film ) or video , including digital video . It could also be an animated display , such as a zoetrope . A still frame

2457-404: Is a still image derived from one frame of a moving one. In contrast, a film still is a photograph taken on the set of a movie or television program during production, used for promotional purposes. In image processing , a picture function is a mathematical representation of a two-dimensional image as a function of two spatial variables . The function f(x,y) describes the intensity of

2548-417: Is actually the result of many individual lines giving the impression of continuous movement. This phenomenon has often been described as " persistence of vision ": a physiological effect of light impressions remaining on the retina of the eye for very brief periods. Even though the term is still sometimes used in popular discussions of movies, it is not a scientifically valid explanation. Other terms emphasize

2639-490: Is called photography . The word photograph was coined in 1839 by Sir John Herschel and is based on the Greek φῶς ( phos ), meaning "light", and γραφή ( graphê ), meaning "drawing, writing", together meaning "drawing with light". The first permanent photograph, a contact-exposed copy of an engraving, was made in 1822 using the bitumen -based " heliography " process developed by Nicéphore Niépce . The first photographs of

2730-414: Is no test to evaluate the long-term effects of these components on photographs. In addition, the plastic sleeves can develop kinks or creases in the surface, which will scratch away at the emulsion during handling. It is best to leave photographs lying flat on the table when viewing them. Do not pick it up from a corner, or even from two sides and hold it at eye level. Every time the photograph bends, even

2821-468: Is not illegal to photograph a person who does not actively object. In South Africa photographing people in public is legal. Reproducing and selling photographs of people is legal for editorial and limited fair use commercial purposes. There exists no case law to define what the limits on commercial use are. In the United Kingdom there are no laws forbidding photography of private property from

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2912-574: Is thought to be the largest collection of autochromes by one photographer in Britain today. The Royal Horticultural Society, UK has among the earliest colour photographs of plants and gardens taken by amateur photographer William Van Sommer (1859–1941), including of RHS Garden Wisley taken around 1913. One of the first books published with color photography used this technique. The 12 volumes of " Luther Burbank: His Methods and Discoveries, Their Practical Application " included 1,260 color photographs and

3003-569: Is very difficult to form an accurate impression of the appearance of any Autochrome image without seeing the original "in person" and correctly illuminated. The lamination of the grains, varnish, and emulsion makes autochrome plates susceptible to deterioration with each layer being vulnerable to changes in environment including moisture, oxidation, cracking, or flaking as well as physical damage from handling; Solutions include conservative lighting conditions, chemical-free materials, medium-range humidity control of between 63 and 68 degrees Fahrenheit, and

3094-580: The light spectrum visible to the human eye and converting such signals into recognizable images. Aside from sculpture and other physical activities that can create three-dimensional images from solid material, some modern techniques, such as holography , can create three-dimensional images that are reproducible but intangible to human touch. Some photographic processes can now render the illusion of depth in an otherwise "flat" image, but "3-D photography" ( stereoscopy ) or " 3-D film " are optical illusions that require special devices such as eyeglasses to create

3185-576: The 1940s or 1950s, and even so, until the 1960s, most photographs were taken in black and white. Since then, color photography has dominated popular photography, although black-and-white is still used, being easier to develop than color. Panoramic format images can be taken with cameras like the Hasselblad Xpan on standard film. Since the 1990s, panoramic photos have been available on the Advanced Photo System (APS) film. APS

3276-481: The Age of Mechanical Reproduction." Benjamin argues that the mechanical reproduction of images, which had accelerated through photographic processes in the previous one hundred years or so, inevitably degrades the "authenticity" or quasi-religious "aura" of the original object. One example is Leonardo da Vinci 's Mona Lisa , originally painted as a portrait, but much later, with its display as an art object, it developed

3367-543: The Albert Kahn collection was published in 2008. The National Geographic Society made extensive use of autochromes and other mosaic color screen plates for over twenty years. 15,000 original Autochrome plates are still preserved in the Society's archives. The collection contains unique photographs, including numerous autochromes from Paris by Auguste Léon from 1925 and by W. Robert Moore from 1936 just before WWII. In

3458-513: The Greek philosopher Plato described our apparent reality as a copy of a higher order of universal forms . As copies of a higher reality, the things we perceive in the world, tangible or abstract, are inevitably imperfect. Book 7 of The Republic offers Plato's " Allegory of the Cave ," where ordinary human life is compared to being a prisoner in a darkened cave who believes that shadows projected onto

3549-612: The U.S. Library of Congress 's huge collection of American Pictorialist photographer Arnold Genthe 's work, 384 of his autochrome plates were among the holdings as of 1955. The George Eastman Museum in Rochester, N.Y. has an extensive collection of early colour photography, including Louise Ducos Du Hauron's earliest autochrome images and materials used by the Lumière brothers. Bassetlaw Museum in Retford , Nottinghamshire holds

3640-460: The addition of screen plates, a yellow filter designed to balance the blue, and adjustments to the size of the silver halide crystals to allow for a broader spectrum of colour and control over the frequency of light. Because the presence of the mosaic color screen made the finished Autochrome image very dark overall, bright light and special viewing arrangements were needed for satisfactory results. Stereoscopic Autochromes were especially popular,

3731-432: The box, lay it flat on the table, and open the folder. If for some reason the researchers or archivists do need to handle the actual photo, perhaps to examine the verso for writing, they can use gloves if there appears to be a risk from oils or dirt on the hands. Because daguerreotypes were rendered on a mirrored surface, many spiritualists also became practitioners of the new art form. Spiritualists would claim that

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3822-498: The cave's wall comprise actual reality. Since art is itself an imitation, it is a copy of that copy and all the more imperfect. Artistic images, then, not only misdirect human reason away from understanding the higher forms of true reality, but in imitating the bad behaviors of humans in depictions of the gods, they can corrupt individuals and society. Echoes of such criticism have persisted across time, accelerating as image-making technologies have developed and expanded immensely since

3913-468: The combined color and depth proving to be a bewitching experience to early 20th-century eyes. Usually of a small size, they were most commonly viewed in a small hand-held box-type stereoscope. Larger, non-stereoscopic plates were most commonly displayed in a diascope, which was a folding case with the Autochrome image and a ground glass diffuser fitted into an opening on one side, and a mirror framed into

4004-651: The complex cognitive operations of the brain and the human visual system. " Flicker fusion ", the " phi phenomenon ", and " beta movement " are among the terms that have replaced "persistence of vision", though no one term seems adequate to describe the process. Image-making seems to have been common to virtually all human cultures since at least the Paleolithic era . Prehistoric examples of rock art —including cave paintings , petroglyphs , rock reliefs , and geoglyphs —have been found on every inhabited continent. Many of these images seem to have served various purposes: as

4095-416: The context of signal processing , an image is a distributed amplitude of color(s). In optics , the term "image" (or "optical image") refers specifically to the reproduction of an object formed by light waves coming from the object. A volatile image exists or is perceived only for a short period. This may be a reflection of an object by a mirror, a projection of a camera obscura , or a scene displayed on

4186-434: The early twentieth century, autochrome was recognized for its aesthetic appeal. Autochrome is an additive color "mosaic screen plate" process. The medium consists of a glass plate coated on one side with a random mosaic of microscopic grains of potato starch dyed red-orange, green, and blue-violet (a variant of the standard red, green, and blue additive colors); the grains of starch act as color filters. Lampblack fills

4277-421: The emulsion, because the grains would be flattened slightly, making them more transparent, and pressed into more intimate contact with each other, reducing wasted space between them. As it was impractical to apply such pressure to the entire plate all at once, a steamroller approach was used which flattened only one very small area at a time. Lampblack was used to block up the slight spaces that remained. The plate

4368-443: The enduring popularity of the medium even after more starkly realistic color processes had become available. Although difficult to manufacture and fairly expensive, Autochromes were relatively easy to use and were immensely popular among enthusiastic amateur photographers, at least among those who could bear the cost and were willing to sacrifice the convenience of black and white hand-held "snapshooting." Autochromes failed to sustain

4459-493: The form of idols . In recent years, militant extremist groups such as the Taliban and ISIS have destroyed centuries-old artifacts, especially those associated with other religions. Virtually all cultures have produced images and applied different meanings or applications to them. The loss of knowledge about the context and connection of an image to its object is likely to result in different perceptions and interpretations of

4550-410: The foundation of all commercial colour photography. Descendants of photographer Antoine Lumière, inventors Louis and Auguste Lumière utilized Du Hauron's (1869) technique, which had already been improved upon by other inventors such as John Joly (1894) and James William McDonough (1896), making it possible to print photographic images in colour. One of the most broadly used forms of colour photography in

4641-446: The fragility of the mirror-like image surface and the particular viewing conditions required to see the image properly. Each was a unique, opaque positive that could only be duplicated by copying it with a camera. Inventors set about working out improved processes that would be more practical. By the end of the 1850s, the daguerreotype had been replaced by the less expensive and more easily viewed ambrotype and tintype , which made use of

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4732-423: The human image on the mirrored surface was akin to looking into one's soul. The spiritualists also believed that it would open their souls and let demons in. Among some Muslims, it is makruh (disliked) to perform salah (worship) in a place decorated with photographs. Photography and darkroom anomalies and artifacts sometimes lead viewers to believe that spirits or demons have been captured in photos. Some have made

4823-570: The illusion of depth. Copies of 3-dimensional images have traditionally had to be crafted one at a time, usually by an individual or team of artisans . In the modern age, the development of plastics and other technologies made it possible to create multiple copies of a 3-dimensional object with less effort; the advent and development of " 3-D printing " has expanded that capability. "Moving" two-dimensional images are actually illusions of movement perceived when still images are displayed in sequence, each image lasting less, and sometimes much less, than

4914-529: The image and even of the original object itself. Through human history, one dominant form of imagery has been in relation to religion and spirituality. Such images, whether in the form of idols that are objects of worship or that represent some other spiritual state or quality, have a different status as artifacts when copies of such images sever links to the spiritual or supernatural. The German philosopher and essayist Walter Benjamin brought particular attention to this point in his 1935 essay "The Work of Art in

5005-471: The image's creator intended them. An image may be taken simply as a more or less "accurate" copy of a person, place, thing, or event. It may represent an abstract concept, such as the political power of a ruler or ruling class, a practical or moral lesson, an object for spiritual or religious veneration, or an object—human or otherwise—to be desired. It may also be regarded for its purely aesthetic qualities, rarity, or monetary value. Such reactions can depend on

5096-503: The image. In modern times, the development of " non-fungible tokens " (NFTs) has been touted as an attempt to create "authentic" or "unique" images that have a monetary value, existing only in digital format. This assumption has been widely debated. The development of synthetic acoustic technologies and the creation of sound art have led to considering the possibilities of a sound-image made up of irreducible phonic substance beyond linguistic or musicological analysis. A still image

5187-599: The initial interest of more serious "artistic" practitioners, largely due to their inflexibility. Not only did the need for diascopes and projectors make them extremely difficult to publicly exhibit, they allowed little in the way of the manipulation much loved by aficionados of the then-popular Pictorialist approach. Autochromes continued to be produced as glass plates into the 1930s, when film-based versions were introduced, first Lumière Filmcolor sheet film in 1931, then Lumicolor roll film in 1933. Although these soon completely replaced glass plate Autochromes, their triumph

5278-440: The introduction of chromogenic color print paper in the 1940s. The needs of the motion picture industry generated a number of special processes and systems, perhaps the best-known being the now-obsolete three-strip Technicolor process. Non-digital photographs are produced with a two-step chemical process. In the two-step process, the light-sensitive film captures a negative image (colors and lights/darks are inverted). To produce

5369-405: The invention of the daguerreotype and other photographic processes in the mid-19th century. By the late 20th century, works like John Berger's Ways of Seeing and Susan Sontag 's On Photography questioned the hidden assumptions of power, race, sex, and class encoded in even realistic images, and how those assumptions and such images may implicate the viewer in the voyeuristic position of

5460-423: The light coming through the individual grains blended together in the eye, reconstructing the color of the light photographed through the filter grains. To create the Autochrome color filter mosaic, a thin glass plate was first coated with a transparent adhesive layer. The dyed starch grains were graded to between 5 and 10 micrometers in size and the three colors were thoroughly intermingled in proportions which made

5551-591: The longer edge of the photo in the buffered paper folder, within a larger archival box, and label each folder with relevant information to identify it. The rigid nature of the folder protects the photo from slumping or creasing, as long as the box is not packed too tightly or under filled. Folder larger photos or brittle photos stacked flat within archival boxes with other materials of comparable size. The most stable of plastics used in photo preservation, polyester , does not generate any harmful chemical elements, nor does it have any capability to absorb acids generated by

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5642-694: The making of images, even though the extent of that proscription has varied with time, place, and sect or denomination of a given religion. In Judaism, one of the Ten Commandments given by God to Moses on Mount Sinai forbids the making of "any graven image, or any likeness [of any thing] that [is] in heaven above, or that [is] in the earth beneath, or that [is] in the water under earth." In Christian history, periods of iconoclasm (the destruction of images, especially those with religious meanings or connotations) have broken out from time to time, and some sects and denominations have rejected or severely limited

5733-400: The mixture appear gray to the unaided eye. They were then spread onto the adhesive, creating a layer with approximately 4,000,000 grains per square inch but only one grain thick. The exact means by which significant gaps and overlapping grains were avoided still remains unclear. It was found that the application of extreme pressure would produce a mosaic that more efficiently transmitted light to

5824-511: The museums in Hong Kong, photography is not allowed without permission from the government. It is illegal to equip or take photographs and recording in a place of public entertainment, such as cinemas and indoor theaters. In Hungary, from 15 March 2014 when the long-awaited Civil Code was published, the law re-stated what had been normal practice, namely, that a person had the right to refuse being photographed. However, implied consent exists: it

5915-494: The nearly fifty-year-long public life of the Autochrome. Between 1909 and 1931, a collection of 72,000 autochrome photographs, documenting life at the time in 50 countries around the world, was created by French banker Albert Kahn . The collection, one of the biggest of its kind in the world, is housed in The Albert Kahn Museum ( Musée Albert-Kahn ) on the outskirts of Paris . A new compilation of images from

6006-489: The other side. The user would place the diascope near a window or other light source so that light passed through the diffuser and the Autochrome, and the resulting back-lit, dark-surrounded image would be viewed in the mirror. Slide projectors, then known as magic lanterns and stereopticons , were a less common but especially effective display technique, more suitable for public exhibitions. Projection required an extremely bright and therefore hot light source (a carbon arc or

6097-523: The philosophy of art. While such studies inevitably deal with issues of meaning, another approach to signification was suggested by the American philosopher, logician, and semiotician Charles Sanders Peirce . "Images" are one type of the broad category of "signs" proposed by Peirce. Although his ideas are complex and have changed over time, the three categories of signs that he distinguished stand out: A single image may exist in all three categories at

6188-504: The photograph itself. Polyester sleeves and encapsulation have been praised for their ability to protect the photograph from humidity and environmental pollution , slowing the reaction between the item and the atmosphere. This is true, however the polyester just as frequently traps these elements next to the material it is intended to protect. This is especially risky in a storage environment that experiences drastic fluctuations in humidity or temperature, leading to ferrotyping, or sticking of

6279-405: The photograph to the plastic. Photographs sleeved or encapsulated in polyester cannot be stored vertically in boxes because they will slide down next to each other within the box, bending and folding, nor can the archivist write directly onto the polyester to identify the photograph. Therefore, it is necessary to either stack polyester protected photographs horizontally within a box, or bind them in

6370-552: The point at coordinates (x,y). In literature, a " mental image " may be developed through words and phrases to which the senses respond. It involves picturing an image mentally, also called imagining, hence imagery. It can both be figurative and literal. Autochrome The Autochrome Lumière was an early color photography process patented in 1903 by the Lumière brothers in France and first marketed in 1907. Autochrome

6461-414: The recently introduced collodion process . Glass plate collodion negatives used to make prints on albumen paper soon became the preferred photographic method and held that position for many years, even after the introduction of the more convenient gelatin process in 1871. Refinements of the gelatin process have remained the primary black-and-white photographic process to this day, differing primarily in

6552-406: The rise of digital prints . These prints are created from stored graphic formats such as JPEG , TIFF , and RAW . The types of printers used include inkjet printers , dye-sublimation printers , laser printers , and thermal printers . Inkjet prints are sometimes given the coined name " Giclée ". The Web has been a popular medium for storing and sharing photos ever since the first photograph

6643-471: The same time. The Statue of Liberty provides an example. While there have been countless two-dimensional and three-dimensional "reproductions" of the statue (i.e., "icons" themselves), the statue itself exists as The nature of images, whether three-dimensional or two-dimensional, created for a specific purpose or only for aesthetic pleasure, has continued to provoke questions and even condemnation at different times and places. In his dialogue, The Republic ,

6734-554: The sensitivity of the emulsion and the support material used, which was originally glass, then a variety of flexible plastic films , along with various types of paper for the final prints. Color photography is almost as old as black-and-white , with early experiments including John Herschel 's Anthotype prints in 1842, the pioneering work of Louis Ducos du Hauron in the 1860s, and the Lippmann process unveiled in 1891, but for many years color photography remained little more than

6825-574: The several layers of coatings on the plate degrades the color saturation. The slight pinkish tinge caused by colloidal scattering (the effect seen through a glass of water into which a couple of drops of milk have been mixed) is exacerbated, and the use of artificial light—especially fluorescent light—upsets the color rendition of a system which the Lumière Brothers carefully balanced for use with natural daylight. Making modern film or digital copies of Autochromes introduces other problems, because

6916-504: The sleeves. Unfortunately, the slippery nature of the enclosure generates a build-up of static electricity , which attracts dust and lint particles. The static can attract the dust to the inside of the sleeve, as well, where it can scratch the photograph. Likewise, these components that aid in insertion of the photo, referred to as slip agents, can break down and transfer from the plastic to the photograph, where they deposit as an oily film, attracting further lint and dust. At this time, there

7007-409: The spaces between grains, and a black-and-white panchromatic silver halide emulsion is coated on top of the filter layer. Unlike ordinary black-and-white plates, the Autochrome was loaded into the camera with the bare glass side facing the lens so that the light passed through the mosaic filter layer before reaching the emulsion. The use of an additional special orange-yellow filter in the camera

7098-447: The subconscious and affective, thus evading direct inquiry through contemplative reasoning. By doing so such axiomatic images let us know what we shall desire (liberalism, in a snapshot: the crunchy honey-flavored cereals and the freshly-pressed orange juice in the back of a suburban one-family home) and from what we shall obstain (communism, in a snapshot: lifeless crowds of men and machinery marching towards certain perdition accompanied by

7189-579: The tunes of Soviet Russian songs). What makes those images so powerful is that it is only of relative minor relevance for the stabilization of such images whether they actually capture and correspond with the multiple layers of reality, or not. Despite, or perhaps because of, the widespread use of religious and spiritual imagery worldwide, the making of images and the depiction of gods or religious subjects has been subject to criticism, censorship, and criminal penalties. The Abrahamic religions ( Judaism , Christianity , and Islam ) all have had admonitions against

7280-512: The use of religious imagery. Islam tends to discourage religious depictions, sometimes quite rigorously, and often extends that to other forms of realistic imagery, favoring calligraphy or geometric designs instead. Depending on time and place, photographs and broadcast images in Islamic societies may be less subject to outright prohibition. In any religion, restrictions on image-making are especially targeted to avoid depictions of "false gods" in

7371-407: The viewer's context. A religious image in a church may be regarded differently than the same image mounted in a museum. Some might view it simply as an object to be bought or sold. Viewers' reactions will also be guided or shaped by their education, class, race, and other contexts. The study of emotional sensations and their relationship to any given image falls into the categories of aesthetics and

7462-591: The visual system's capabilities. On the other hand, some processes can be used to create visual representations of objects that are otherwise inaccessible to the human visual system. These include microscopy for the magnification of minute objects, telescopes that can observe objects at great distances, X-rays that can visually represent the interior structures of the human body (among other objects), magnetic resonance imaging (MRI) , positron emission tomography (PET scans) , and others. Such processes often rely on detecting electromagnetic radiation that occurs beyond

7553-553: Was an additive color "mosaic screen plate" process. It was one of the principal color photography processes in use before the advent of subtractive color film in the mid-1930s. A competing process was that of the Russian Sergey Prokudin-Gorsky . Prior to the Lumière brothers, Louis Ducos du Hauron utilized the separation technique to create colour images on paper with screen plates, producing natural colours through superimposition, which would become

7644-441: Was developed by several of the major film manufacturers to provide a film with different formats and computerized options available, though APS panoramas were created using a mask in panorama-capable cameras, far less desirable than a true panoramic camera, which achieves its effect through a wider film format. APS has become less popular and has been discontinued. The advent of the microcomputer and digital photography has led to

7735-424: Was filtered in situ. Each starch grain remained in alignment with the corresponding microscopic area of silver halide emulsion coated over it. When the finished image was viewed by transmitted light, each bit of the silver image acted as a micro-filter, allowing more or less light to pass through the corresponding colored starch grain, recreating the original proportions of the three colors. At normal viewing distances,

7826-498: Was published on the web by Tim Berners-Lee in 1992 (an image of the CERN house band Les Horribles Cernettes ). Today, popular sites such as Flickr , PhotoBucket , and 500px are used by millions of people to share their pictures. The first "selfie", or self-portrait, was taken by Robert Cornelious back in 1839. "Selfies" have become one of the most common photographs, especially among female young adults. Social media has become such

7917-426: Was required to block ultraviolet light and restrain the effects of violet and blue light, parts of the spectrum to which the emulsion was overly sensitive. Because of the light loss due to all the filtering, Autochrome plates required much longer exposures than black-and-white plates and films, which meant that a tripod or other stand had to be used and that it was not practical to photograph moving subjects. The plate

8008-490: Was reversal-processed into a positive transparency — that is, the plate was first developed into a negative image but not "fixed", then the silver forming the negative image was chemically removed, then the remaining silver halide was exposed to light and developed, producing a positive image. The luminance filter (silver halide layer) and the mosaic chrominance filter (the colored potato starch grain layer) remained precisely aligned and were distributed together, so that light

8099-400: Was short-lived, as Kodak and Agfa soon began to produce multi-layer subtractive color films ( Kodachrome and Agfacolor Neu respectively). Nevertheless, the Lumière products had a devoted following, above all in France, and their use persisted long after modern color films had become available. The final version, Alticolor, was introduced in 1952 and discontinued in 1955, marking the end of

8190-408: Was then coated with shellac to protect the moisture-vulnerable grains and dyes from the water-based gelatin emulsion, which was coated onto the plate after the shellac had dried. The resulting finished plate was cut up into smaller plates of the desired size, which were packaged in boxes of four. Each plate was accompanied by a thin piece of cardboard colored black on the side facing the emulsion. This

8281-436: Was to be retained when loading and exposing the plate and served both to protect the delicate emulsion and to inhibit halation . The 1906 U.S. patent describes the process more generally: the grains can be orange, violet, and green, or red, yellow, and blue (or "any number of colors"), optionally with black powder filling the gaps. Experimentations within the early twentieth century provided solutions to many issues, including

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