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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, Live-action shooting for compositing is variously called "chroma key", "blue screen", "green screen" and other names. Today, most 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 (software), Natron) replaces every pixel within the designated color range with a pixel from another image, aligned to appear ... [...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. It's part of VFX processing. 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 adetpixel, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compositing – Exchanging The Background Using A Mask
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, Live-action shooting for compositing is variously called "chroma key", "blue screen", "green screen" and other names. Today, most 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 (software), Natron) replaces every pixel within the designated color range with a pixel from another image, aligned to appear ... [...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-Foichat in June 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 6, 2014), which brought rotoscoping and chroma k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chroma Key
Chroma key compositing, or chroma keying, is a Visual effects, visual-effects and post-production technique for compositing (layering) two or more images or video streams together based on colour hues (colorfulness, chroma range). The technique has been used in many fields to background subtraction, 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 backg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Intermediate
Digital intermediate (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 with film scanning ... [...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 e ... [...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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Post-production
Post-production, also known simply as post, 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 traditional first part of the post-production process, non-linear (analog) film editing, has mostly been replaced by digital or video editing software, which operates as a non-linear editing (NLE) system. The advantage of non-linear editing is the ability to edit scenes out of order, thereby making creative changes at will. This flexibility facilitates carefully shaping the film in a thoughtful, meaningful way for emotional effect. Once the production team is satisfied with the picture editing, the editing is said to be ''locked''. At this point the turnover process begins, in which the picture is prepared for lab and color finishing, and the sound is ''spotted'' and turned over to the composer and sound desi ... [...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 Law, Gwyneth Paltrow, and Angelina Jolie. 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 was sketched out via hand-drawn storyboards and then recreated as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Set Construction
Set construction is the process undertaken by a construction manager to build full-scale scenery, as specified by a production designer or art director working in collaboration with the director of a production to create a set for a theatrical, film, or television production. The set designer produces a scale model, scale drawings, paint elevations (a scale painting supplied to the scenic painter of each element that requires painting), and research about props, textures, and so on. Scale drawings typically include a ground plan, elevation, and section of the complete set, as well as more detailed drawings of individual scenic elements which, in theatrical productions, may be static, flown, or built onto scenery wagons. Models and paint elevations are frequently hand-produced, though in recent years, many Production Designers and most commercial theatres have begun producing scale drawings with the aid of computer drafting programs such as AutoCAD or Vectorworks. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky Captain Angelina Jolie
The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space. In the field of astronomy, the sky is also called the celestial sphere. This is an abstract sphere, concentric to the Earth, on which the Sun, Moon, planets, and stars appear to be drifting. The celestial sphere is conventionally divided into designated areas called constellations. Usually, the term ''sky'' informally refers to a perspective from the Earth's surface; however, the meaning and usage can vary. An observer on the surface of the Earth can see a small part of the sky, which resembles a dome (sometimes called the ''sky bowl'') appearing flatter during the day than at night. In some cases, such as in discussing the weather, the sky refers to only the lower, denser layers of the atmosphere. The daytime sky appears blue because air molecules scatter sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
