| 翻訳と辞書 |
Prizma
The Prizma Color system was a technique of color motion picture photography, invented in 1913 by William Van Doren Kelley and Charles Raleigh. Initially, it was a two-color additive color system, similar to its predecessor, Kinemacolor. However, Kelley eventually transformed Prizma into a bi-pack color system that itself became the predecessor for future color processes such as Multicolor and Cinecolor.
==Experimental==
Prizma gave a demonstration of color motion pictures in 1917 that used an additive four-color process, using a disk of four filters acting on a single strip of panchromatic film in the camera. The colors were red, yellow, green, and blue, with overlapping wavelengths to prevent pulsating effects on the screen with vivid colors. The film was photographed at 26 to 32 frames per second, and projected at 32 frame/s. The disk used in projection consisted mainly of two colors, red-orange and blue-green, adapted to the four-color process by the superimposition of two small magenta filters over one of the red sectors and two similar blue filters over one of the blue-green sectors.〔Louis Derr, "Photography", ''Chemical Abstracts'' (1917), vol. 11, pp. 1933–1934.〕〔"The Prizma Film", ''The Edison Monthly'' (1917), vol. 10, p. 90.〕 ''Motion Picture News'' reported,
:The results by this process are characterized by extreme delicacy of color, and subdued shades are most admirably rendered.… The blue-green element of the projecting filter appears to favor the blue rather than the green, and as a result, skies and water are well reproduced. We have not noticed anything approaching a true green in any of the subjects so far exhibited, although this is probably by reason of the fact that no prominent greens existed in the subjects photographed. Yellow is not in evidence in the current Prizma films, although a wide variety of warm tones are apparent, ranging from chestnut-brown to a deep red-orange. Colors in full saturation are hardly within the scope of this process.〔"The Prizma Process of Color Photography", ''Motion Picture News'' (1917), p. 1890.〕
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「Prizma」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.
|
|