Camouflage images

Hung Kuo Chu, Wei Hsin Hsu, Niloy J. Mitra, Daniel Cohen-Or, Tien Tsin Wong, Tong-Yee Lee

Research output: Contribution to journalArticle

37 Citations (Scopus)


Camouflage images contain one or more hidden figures that remain imperceptible or unnoticed for a while. In one possible explanation, the ability to delay the perception of the hidden figures is attributed to the theory that human perception works in two main phases: feature search and conjunction search. Effective camouflage images make feature based recognition difficult, and thus force the recognition process to employ conjunction search, which takes considerable effort and time. In this paper, we present a technique for creating camouflage images. To foil the feature search, we remove the original subtle texture details of the hidden figures and replace them by that of the surrounding apparent image. To leave an appropriate degree of clues for the conjunction search, we compute and assign new tones to regions in the embedded figures by performing an optimization between two conflicting terms, which we call immersion and standout, corresponding to hiding and leaving clues, respectively. We show a large number of camouflage images generated by our technique, with or without user guidance. We have tested the quality of the images in an extensive user study, showing a good control of the difficulty levels.

Original languageEnglish
Article number51
JournalACM Transactions on Graphics
Issue number4
Publication statusPublished - 2010 Sep 13


All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design

Cite this

Chu, H. K., Hsu, W. H., Mitra, N. J., Cohen-Or, D., Wong, T. T., & Lee, T-Y. (2010). Camouflage images. ACM Transactions on Graphics, 29(4), [51].