Recognition of positive and negative bandpass-filtered images

Perception. 1986;15(5):595-602. doi: 10.1068/p150595.


A study is reported in which the significance for vision of low- and high-spatial-frequency components of photographic positive and negative images was investigated by measuring recognition of bandpass-filtered photographs of faces. The results show that a 1.5 octave bandpass-filtered image contains sufficient visual information for good recognition performance, provided the filter is centred close to 20 cycles facewidth-1. At low spatial frequencies negatives are more difficult to recognize than positives, but at high spatial frequencies there is no difference in recognition, implying that it is the low-frequency components of negatives which present difficulties for the visual system.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Color Perception*
  • Face*
  • Form Perception*
  • Humans
  • Pattern Recognition, Visual*
  • Physical Stimulation