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Compositing
Compositing is the process or technique of combining visual elements from separate sources into single images, often to create the illusion that all those elements are parts of the same scene. Live-action shooting for compositing is variously called "chroma key", "blue screen", "green screen" and other names. Today, most, though not all, compositing is achieved through digital image manipulation. Pre- digital compositing techniques, however, go back as far as the trick films of Georges Méliès in the late 19th century, and some are still in use. Basic procedure All compositing involves the replacement of selected parts of an image with other material, usually, but not always, from another image. In the digital method of compositing, software commands designate a narrowly defined color as the part of an image to be replaced. Then the software (e.g. Natron) replaces every pixel within the designated color range with a pixel from another image, aligned to appear as part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Compositing
Digital compositing is the process of digitally assembling multiple images to make a final image, typically for print, motion pictures or screen display. It is the digital analogue of optical film compositing. Mathematics The basic operation used in digital compositing is known as 'alpha blending', where an opacity value, 'α', is used to control the proportions of two input pixel values that end up a single output pixel. As a simple example, suppose two images of the same size are available and they are to be composited. The input images are referred to as the foreground image and the background image. Each image consists of the same number of pixels. Compositing is performed by mathematically combining information from the corresponding pixels from the two input images and recording the result in a third image, which is called the composited image. Consider three pixels; * a foreground pixel, f * a background pixel, b * a composited pixel, c and * α, the opacity value of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Compositing
Digital compositing is the process of digitally assembling multiple images to make a final image, typically for print, motion pictures or screen display. It is the digital analogue of optical film compositing. Mathematics The basic operation used in digital compositing is known as 'alpha blending', where an opacity value, 'α', is used to control the proportions of two input pixel values that end up a single output pixel. As a simple example, suppose two images of the same size are available and they are to be composited. The input images are referred to as the foreground image and the background image. Each image consists of the same number of pixels. Compositing is performed by mathematically combining information from the corresponding pixels from the two input images and recording the result in a third image, which is called the composited image. Consider three pixels; * a foreground pixel, f * a background pixel, b * a composited pixel, c and * α, the opacity value of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natron (software)
Natron is a free and open-source node-based compositing application. It has been influenced by digital compositing software such as Avid Media Illusion, Apple Shake, Blackmagic Fusion, Autodesk Flame and Nuke, from which its user interface and many of its concepts are derived. Natron supports plugins following the OpenFX 1.4 API. Most open-source and commercial OpenFX plug-ins are supported. Origin of the name Natron is named after Lake Natron in Tanzania which, according to Natron lead programmer Alexandre Gauthier, provides "natural visual effects" by preserving its dead animals. History Natron was started by Alexandre Gauthier in June of 2012 as a personal project. The project was the winner of the 2013 ''Boost Your Code'' contest by Inria. The prize was a 12-month employment contract to develop Natron as a free and open-source software within the institute. The first widely available public release was 0.92 (June 6th, 2014), which brought rotoscoping and chroma keying ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chroma Key
Chroma key compositing, or chroma keying, is a visual-effects and post-production technique for compositing (layering) two images or video streams together based on colour hues ( chroma range). The technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture, and video game industries. A colour range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as colour keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific colour-related variants such as green screen or blue screen; chroma keying can be done with backgrounds of any colour that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gladiator (2000 Film)
''Gladiator'' is a 2000 epic historical drama film directed by Ridley Scott and written by David Franzoni, John Logan, and William Nicholson. The film was co-produced and released by DreamWorks Pictures and Universal Pictures. DreamWorks Pictures distributed the film in North America while Universal Pictures released it internationally through United International Pictures. It stars Russell Crowe, Joaquin Phoenix, Connie Nielsen, Ralf Möller, Oliver Reed (in his final role), Djimon Hounsou, Derek Jacobi, John Shrapnel, Richard Harris, and Tommy Flanagan. Crowe portrays Roman general Maximus Decimus Meridius, who is betrayed when Commodus, the ambitious son of Emperor Marcus Aurelius, murders his father and seizes the throne. Reduced to slavery, Maximus becomes a gladiator and rises through the ranks of the arena to avenge the murders of his family and his emperor. Inspired by Daniel P. Mannix's 1958 book ''Those About to Die'' (formerly titled ''The Way of the Gladiator'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Front Projection
A front projection effect is an in-camera visual effects process in film production for combining foreground performance with pre-filmed background footage. In contrast to rear projection, which projects footage onto a screen from behind the performers, front projection projects the pre-filmed material over the performers and onto a highly reflective background surface. Description In contrast to rear projection, in front projection the background image is projected onto both the performer and a highly reflective background screen, with the result that the projected image is bounced off the screen and into the lens of a camera. This is achieved by having a screen made of a retroreflective material such as Scotchlite, a product of the 3M company that is also used to make screens for movie theaters. Such material is made from millions of glass beads affixed to the surface of the cloth. These glass beads reflect light back only in the direction from which it came, far more eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Intermediate
Digital intermediate (typically abbreviated DI) is a motion picture finishing process which classically involves digitizing a motion picture and manipulating the color and other image characteristics. Definition and overview A digital intermediate often replaces or augments the photochemical timing process and is usually the final creative adjustment to a movie before distribution in theaters. It is distinguished from the telecine process in which film is scanned and color is manipulated early in the process to facilitate editing. However the lines between telecine and DI are continually blurred and are often executed on the same hardware by colorists of the same background. These two steps are typically part of the overall color management process in a motion picture at different points in time. A digital intermediate is also customarily done at higher resolution and with greater color fidelity than telecine transfers. Although originally used to describe a process that started wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky Captain And The World Of Tomorrow
''Sky Captain and the World of Tomorrow'', often shortened to ''Sky Captain'', is a 2004 science fiction action- adventure film written and directed by Kerry Conran in his directorial debut, and produced by Jon Avnet, Sadie Frost, Jude Law and Marsha Oglesby. It stars Jude Law, Gwyneth Paltrow, and Angelina Jolie. It is an example of "Ottensian" (pre-WWII) '' dieselpunk''. Conran spent four years making a black and white teaser using a bluescreen set up in his living room and a Macintosh IIci. He was able to show it to Avnet, who was so impressed that Avnet spent two years working with him on his screenplay. No major studio was interested, but Avnet convinced Aurelio De Laurentiis to finance ''Sky Captain'' without a distribution deal (a worldwide distribution deal would later happen with Paramount Pictures). Almost 100 digital artists, modelers, animators, and compositors created the multi-layered 2D and 3D backgrounds for the live-action footage, while the entire film ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiple 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] |
Post-production
Post-production is part of the process of filmmaking, video production, audio production, and photography. Post-production includes all stages of production occurring after principal photography or recording individual program segments. The first part of the post-production process is the traditional non-linear (analog) film editing at the outset of post-production has mostly been replaced by digital or video editing software that operates as a non-linear editing (NLE) system. The advantage of being able to have this non-linear capacity is in the flexibility for editing scenes out of order, making creative changes at will, carefully shaping the film in a thoughtful, meaningful way for emotional effect. Once the production team is satisfied with the picture editing, the picture editing is said to be "locked." At this point begins the turnover process, where the picture is prepared for lab and color finishing and the sound is "spotted" and turnover to the composer and sound de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gone With The Wind (film)
''Gone with the Wind'' is a 1939 American epic historical romance film adapted from the 1936 novel by Margaret Mitchell. The film was produced by David O. Selznick of Selznick International Pictures and directed by Victor Fleming. Set in the American South against the backdrop of the American Civil War and the Reconstruction era, the film tells the story of Scarlett O'Hara ( Vivien Leigh), the strong-willed daughter of a Georgia plantation owner, following her romantic pursuit of Ashley Wilkes (Leslie Howard), who is married to his cousin, Melanie Hamilton (Olivia de Havilland), and her subsequent marriage to Rhett Butler (Clark Gable). The film had a troubled production. The start of filming was delayed for two years until January 1939 because of Selznick's determination to secure Gable for the role of Rhett. The role of Scarlett was difficult to cast, and 1,400 unknown women were interviewed for the part. The original screenplay by Sidney Howard underwent many revisions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rear Projection
Rear projection (background projection, process photography, etc.) is one of many in-camera effects cinematic techniques in film production for combining foreground performances with pre-filmed backgrounds. It was widely used for many years in driving scenes, or to show other forms of "distant" background motion. Technique Actors stand in front of a screen while a projector positioned behind the screen casts a reversed image of the background. This requires a large space, as the projector needs to be placed some distance from the back of the screen. Frequently the background image may initially appear faint and washed out compared to the foreground. The image that is projected can be still or moving, but is always called the ''plate.'' One might hear the command "Roll plate" to instruct stage crew to begin projecting. These so-called ''process shots'' were widely used to film actors as if they were inside a moving vehicle, who in reality are in a vehicle mock-up on a sound st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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