円筒表面に知覚される明暗の境界 : 窓際での人の顔のモデリングに関する研究 その4

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書誌事項

タイトル別名
  • BOUNDARY BETWEEN LIGHT AND SHADE AREAS PERCEIVED ON CYLINDER SURFACE : Modelling of human face at a window Part 4
  • エントウ ヒョウメン ニ チカク サレル メイアン ノ キョウカイ マドギワ デ ノ ヒト ノ カオ ノ モデリング ニ カンスル ケンキュウ ソノ 4

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説明

The proportion of the light and shade areas of the face is very important when the modelling is evaluated. It is necessary to investigate the features of the boundary between perceived light and shade areas and the relationship between the boundary position and the luminous quantities. An experiment was carried out in which the subjects judged the boundary position of the light and shade areas on a cylinder illuminated from one direction. It was found that the observation position (angle) and the cylindrical size did not affect the boundary position perceived on the cylinder surface. The angle at which the boundary was found was consistent with that showing the largest ratio of luminance at successive two points on the cylinder surface.

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