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JPH0865705A Expired / Lapsed JP ⏱️ 0.0 years remaining

Soft chroma key processing method

Assignee: IMAGICA KK
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Filing: 1994-08-25
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Granted: —
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Expires: 2014-08-25
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 前景物体上にある背景色の照り返し色成分や 洩れ等を除去し、境界部分の滑らかさを損わないように 合成することができるようにする。 【構成】 RGB3次元空間9内を、背景代表色を頂点 として共有する複数の三角錐空間に区切り、各三角錐空 間ごとに内側と中間と外側の3つの平面を設定し、対応 する平面を組合せて、RGB3次元空間9内に3重の多 面体6〜8を作り、RGB3次元空間9を、前景が関与 しない完全な背景領域29と、前景と背景がミックスさ れるソフトキー領域31と、背景は関与しないが色変換 を施す色変換前景領域33と、背景は関与せず色も変換 しない完全前景領域32との4つの領域に分類し、素材 画像の各絵素が、RGB3次元空間9を区切る複数の三 角錐空間のうちどの三角錐空間に属するかを調べて、所 属する三角錐空間ごとに上記4つの領域などによって定 められる識別関数から得られるパラメータを用いてキー 値を算出するようにする。 (57) [Abstract] [Purpose] It is possible to remove the reflected color component and leakage of the background color on the foreground object so that they can be combined without impairing the smoothness of the boundary portion. [Structure] The RGB three-dimensional space 9 is divided into a plurality of triangular pyramid spaces sharing a background representative color as vertices, three planes of an inner side, an intermediate side, and an outer side are set for each triangular pyramid space, and corresponding planes are combined. Then, three polyhedrons 6 to 8 are formed in the RGB three-dimensional space 9, and the RGB three-dimensional space 9 is composed of a complete background area 29 in which the foreground is not involved, a soft key area 31 in which the foreground and the background are mixed, and a background. Each of the picture elements of the material image divides the RGB three-dimensional space 9 into four areas, that is, a color conversion foreground area 33 that does not participate but performs color conversion, and a complete foreground area 32 that does not involve the background and does not convert color. It is determined which of the plurality of triangular pyramid spaces it belongs to, and a key value is calculated using a parameter obtained from the discriminant function defined by the above four regions for each triangular pyramid space to which it belongs. To do.

Inventors

  • 👤 Yasushi Mishima
  • 👤 也守志 三島

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 18:42
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