撮影レンズの焦点距離が画像上の奥行距離と側方距離の知覚に及ぼす影響

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  • Effects of Lens Focal Length on Perception of Depth and Lateral Distances in Photographic Images
  • サツエイ レンズ ノ ショウテン キョリ ガ ガゾウジョウ ノ オクユキ キョリ ト ソクホウ キョリ ノ チカク ニ オヨボス エイキョウ

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Using photographs that included two targets,the effects of the lens focal length on perception of the absolute distance to a single target,the relative distance between near and far targets,and the lateral distance between left and right targets were examined.Results showed that the absolute distances decreased in nearly inverse proportion to the focal length while the relative distances were barely affected by focal length though they were consistently underestimated.Because the absolute size of every target in the photographs varied in proportion to the focal length while the size ratio between two targets(relative size) did not change with the focal length,the perceived absolute distance apparently strongly depends on the target size,and the perceived relative distance is much more dependent on the relative size.Results also showed that the perceived lateral distances were approximately equal to the actual distances and not a ected by either the focal length or the target size.

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