Hidden images

Research output: Chapter in Book/Report/Conference proceedingChapter


It is relatively easy to hide pictorial images, but this is of little value if they remain hidden. Presenting hidden images for visual purposes is a modern preoccupation, and some of the perceptual processes involved in them are described in this chapter. Pictorial images can be concealed in terms of detection or recognition. In both cases there is interplay between the global features of the concealed image and the local elements that carry it. Gestalt grouping principles can hinder as well as help recognition. Examples of images (mostly faces) hidden in geometrical designs and text as well as orientation are shown. Rather than being pictorial puzzles alone, hidden images can reveal aspects of visual processing. This chapter explores these concepts and related ideas such as perceptual portraits and pictorial puzzles.
Original languageEnglish
Title of host publicationThe Oxford Compendium of Visual Illusions
EditorsArthur G. Shapiro, Dejan Todorovic
Place of PublicationOxford
PublisherOxford University Press
Number of pages7
ISBN (Electronic)9780190654795
ISBN (Print)9780199794607
Publication statusPublished - Jun 2017


  • pictorial puzzles
  • perceptual portraits
  • detection
  • recognition
  • Gestalt grouping


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