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Quantification of visual inducement of knots by eye-tracking

  • The Correction to this article has been published in Journal of Wood Science 2018 64:1777

Abstract

Knots have been considered an undesirable visual feature of lumber. To clarify the essence of this visual undesirability, eye-tracking data from 20 subjects, who freely observed 55 images of wood wall panels, were recorded and distribution maps of eye-fixation pauses were composed. These maps were compared with the arrangement of knots on each knotty wall panel image and the visual inducement of knots was evaluated using a new numerical index of pausing probability. The present study is the first to objectively quantify the visual inducement of knots. In addition, the subjective noticeability of knots and ten visual impressions of each wood panel image were investigated by a sensory evaluation. There was a very clear linear relationship between the visual inducement of knots and the subjective noticeability of knots. A correlation analysis suggested that many visual impressions of wood wall panels were influenced by a complementary effect between the subjective noticeability of knots and the visual inducement of knots. The visual impact of knots was masked to some extent by special visual stimuli such as deep red grooves on the wood wall panels.

References

  1. 1.

    Masuda M, Nakamura M (1987) Influence of knots on psychological images of panels (in Japanese). Bull Kyoto Univ Forest 59:273–282

    Google Scholar 

  2. 2.

    Nakamura M, Masuda M, Inagaki M (1993) Influence of knots and grooves on psychological images of wood wall-panels (in Japanese). Mokuzai Gakkaishi 39:152–160

    Google Scholar 

  3. 3.

    Broman NO (1995) Attitudes toward Scots pine wood surfaces: a multivariate approach. Mokuzai Gakkaishi 41:994–1005

    Google Scholar 

  4. 4.

    Broman NO (1996) Two methods for measuring people’s preferences for Scots pine wood surfaces: a comparative multivariate analysis. Mokuzai Gakkaishi 42:130–139

    Google Scholar 

  5. 5.

    Broman NO (2001) Aesthetic properties in knotty wood surfaces and their connection with people’s preferences. J Wood Sci 47:192–198

    Article  Google Scholar 

  6. 6.

    Sakuragawa S, Miyazaki Y, Kaneko T, Makita T (2005) Influence of wood wall panels on physiological and psychological responses. J Wood Sci 51:136–140

    Article  Google Scholar 

  7. 7.

    Tsunetsugu Y, Miyazaki Y, Sato H (2007) Physiological effect in human induced by the visual stimulation of room interiors with different wood quantities. J Wood Sci 53:11–16

    Article  Google Scholar 

  8. 8.

    Nakamura M, Kondo T (2007) Characterization of distribution pattern of eye fixation pauses in observation of knotty wood panel images. J Physiol Anthropol 26:129–133

    Article  PubMed  Google Scholar 

  9. 9.

    Nakamura M, Masuda M (1995) Simplified statistical method to process data from sensory evaluation (in Japanese). Wood Ind 50:18–21

    Google Scholar 

Download references

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Correspondence to Masashi Nakamura.

Additional information

This study was presented at the 56th and 57th Annual Meetings of the Japan Wood Research Society, Akita and Hiroshima, August 2006 and August 2007, respectively

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Nakamura, M., Kondo, T. Quantification of visual inducement of knots by eye-tracking. J Wood Sci 54, 22–27 (2008). https://doi.org/10.1007/s10086-007-0910-z

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Key words

  • Knot
  • Visual inducement
  • Masking effect
  • Eye mark
  • Sugi