翻訳と辞書 |
Primatte chromakey technology : ウィキペディア英語版 | Primatte chromakey technology Primatte is a chroma key technology used in motion picture, television and photographic host applications to remove solid colored backgrounds (greenscreen or bluescreen usually) and replace them with transparency to facilitate ‘background replacement’. It uses a unique algorithm based on three multi-faceted polyhedrons floating in RGB colorspace that are used to isolate color regions in the foreground image. Primatte is often referred to as a compositing technology and is usually used as a plug-in for host products such as Adobe After Effects, Adobe Photoshop, Autodesk Media and Entertainment Inferno or Flame, Eyeon Fusion and several other compositing and editing software packages. == Workflow == Primatte is usually activated on a foreground image with a person or other foreground object filmed or digitized against a solid colored background or backing screen; usually a bluescreen or a greenscreen. The solid colored background area is removed and replaced with transparency. This allows the user to replace the solid colored background with a background image of his choice. If the foreground object was filmed close to the backing screen or with less than ideal lighting conditions, the foreground object will usually have ‘spill’ somewhere on it. This is most common when filming blonde people against a blue or greenscreen as their translucent hair will absorb the backing screen color. Such ‘colorspill’ can be removed and replaced with several options to achieve a more realistic result. Another problem is chromakeying images that were created on film stock is that some film stocks have a distinct ‘film grain’ to them. A large amount of film grain will often cause rough edges around the foreground object. Rough edges can be minimized to achieve a smoother transition between the edges of the ‘chroma keyed’ foreground object and the user selected background image.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Primatte chromakey technology」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|