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 language | English |
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Pages (from-to) | 4003-4009 |
Number of pages | 7 |
Journal | Vision Research |
Volume | 39 |
Issue number | 24 |
DOIs | |
Publication status | Published - Dec 1999 |
Externally published | Yes |