Hybrid image of three contents

Peeraya Sripian, Yasushi Yamaguchi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A hybrid image allows multiple image interpretations to be modulated by the viewing distance. Originally, it can be constructed by combining the low and high spatial frequencies of two different images. The original hybrid image synthesis was limited to similar shapes of source images that were aligned in the edges, e.g., faces with a different expression, to produce an effective double image interpretation. In our previous work, we proposed a noise-inserted method for synthesizing a hybrid image from dissimilar shape images or unaligned images. In this work, we propose a novel method for adding an image to be seen from a middle viewing distance. The middle-frequency (MF) image is extracted by a special bandpass filter, which generates ringing while extracting only specified frequency bands. With this method, the middle frequency should be perceived as a meaningless pattern when viewed from a far distance and close up. A parameter tuning experiment was performed to determine the suitable cutoff frequencies for designing the filter for the MF image. We found that ringings of a suitable size could be used to make the middle frequency less noticeable when seen from far away.

Original languageEnglish
Article number4
JournalVisual Computing for Industry, Biomedicine, and Art
Issue number1
Publication statusPublished - 2020 Dec


  • Contrast sensitivity
  • Frequency filtering
  • Hybrid image
  • Scale-space

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Vision and Pattern Recognition
  • Software
  • Computer Science (miscellaneous)
  • Medicine (miscellaneous)
  • Visual Arts and Performing Arts


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