Barber Pole効果の時空間周波数スぺクトルからの考察: 視知覚信号処理工学に関連して

摘要

Motion illusions in a wide sense can be classified as "purely physical phenomenon", "visible band motion", and "apparent motion". By examining the frequency spectrum of the picture of the so-called barber pole effect, it is found that the thinner (the longer) a watching window becomes, the stronger the going-up components become relatively. Hence, men watch the picture purely as it is, as a physical phenomenon while the effect has nothing to do with visual property nor brain functions. Therefore, the effect can not be recognized as an illusion.%所謂「動きを伴う（広義の)錯視」には，「単なる物理現象」，「視域運動」，「仮現運動」の3種がある.barber pole効果の画像成分の時空間周波数スペクトルを解明した結果，観察窓が縦長になるに従って相対的の上昇成分のみに近くなることを導いた.したがって，ヒトは「単なる物理現象」を正しく見ており，この視知覚には視覚特性も脳機能も関与していないこと，即ち，真の「錯視」ではないことを明らかにした.