Natural preference in luminosity for frame composition

Naoharu Kobayashi, Kosuke Itoh, Kiyotaka Suzuki, Ingrid Kwee, Tsutomu Nakada

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We investigated whether or not frame composition spontaneously selected by individuals exhibit a natural left shift in preference of luminosity, as previously suggested, by examining biases in luminosity imprinted in photographs taken under three different conditions: (i) daytime pictures taken outside without determination of frame composition (N=4153); (ii) daytime pictures taken outside with determination of frame composition (N=4035); and (iii) pictures taken inside with determination of frame composition (N=4045). As anticipated, there was a strong vertical gradient of luminance grayscale intensity, reflecting natural day light distribution, for pictures of categories (i) and (ii). Similarly, a minor vertical gradient was detected for pictures of category (iii), indicating common room lighting conditions. To our great interest, there was a consistent leftward tilt of ca. 2 and 9° found in the vertical gradients for pictures of categories (ii) and (iii), respectively, but not for pictures of category (i). The result provides clear-cut evidence that there is indeed a natural preference for a leftward bias in luminosity for frame composition.

Original languageEnglish (US)
Pages (from-to)1137-1140
Number of pages4
Issue number11
StatePublished - Jul 2007


  • Bayesian prior
  • Left-right asymmetry
  • Light-from-above prior
  • Shape from shading
  • Visual perception

ASJC Scopus subject areas

  • Neuroscience(all)


Dive into the research topics of 'Natural preference in luminosity for frame composition'. Together they form a unique fingerprint.

Cite this