Lighting direction affects recognition of untextured faces in photographic positive and negative

Chang Hong Liu, Charles A. Collin, A. Mike Burton, Avi Chaudhuri

Research output: Contribution to journalArticleResearchpeer-review

54 Citations (Scopus)

Abstract

Face recognition in photographic positive and negative was examined in a same/different matching task in five lighting direction conditions using untextured 3-D laser-scanned faces. The lighting directions were +60, +30, 0, -30 and -60°, where negative values represent bottom lighting and positive values represent top lighting. Recognition performance was better for faces in positive than in negative when lighting directions were at +60°. In one experiment, the same effect was also found at +30°. However, faces in negative were recognized better than positive when the direction was -60°. There was no difference in recognition performance when the lighting direction was 0 and -30°. These results confirm that the effect of lighting direction can be a determinant of the photographic negative effect. Positive faces, which normally appear to be top-lit, may be difficult to recognize in negative partly because of the accompanying change in apparent lighting direction to bottom-lit.

Original languageEnglish
Pages (from-to)4003-4009
Number of pages7
JournalVision Research
Volume39
Issue number24
DOIs
Publication statusPublished - Dec 1999
Externally publishedYes

Fingerprint

Dive into the research topics of 'Lighting direction affects recognition of untextured faces in photographic positive and negative'. Together they form a unique fingerprint.

Cite this