Is the Dress Blue N Black or White N Gold

. 2016 Aug 31;11(8):e0161090.

doi: 10.1371/journal.pone.0161090. eCollection 2016.

Blue-Black or White-Gold? Early Stage Processing and the Color of 'The Dress'

Affiliations

• PMID: 27580077
• PMCID: PMC5007038
• DOI: 10.1371/journal.pone.0161090

Free PMC article

Blue-Black or White-Gold? Early Stage Processing and the Color of 'The Dress'

Jeff Rabin  et al. PLoS One. 2016 .

Free PMC article

Abstract

Purpose: In Feb 2015 an image of a dress posted on Tumblr triggered an internet phenomenon: Is the Dress blue and black (BB) or white and gold (WG)? Many claim BB and others insist WG while the true colors are BB. The prevailing theory is that assumptions about the illuminant govern perception of the Dress with WG due to bluish lighting and BB due to yellowish. Our purpose was to determine if early stage optical, retinal and/or neural factors also impact perception of the Dress.

Methods: Thirty-nine subjects were categorized as BB or WG based on their initial perception of the Dress and their perception reported when viewing the Dress on iPhone 5, iPad, and 22" LCD displays. Macular pigment optical density (MPOD) measured with the QuantifEye™ MPS II and visual brainwaves (VEPs) in response to brief presentations of a transparency of the Dress illuminated by a flashing light were measured on each subject and compared between BB and WG groups. Additionally, CIE chromaticity (color) and luminance (brightness) were measured from multiple areas of the Dress image to determine cone stimulation and contrast.

Results: Mean MPOD was higher in the WG group (0.49) vs. the BB (0.41, p = 0.04) and median values were higher as well (WG = 0.46, BB = 0.36, p = 0.03). There was no difference in VEP amplitude between groups (p > 0.85) but mean VEP latency was longer in WG (130 msec.) vs. the BB group (107 msec., p = 0.0005). Colorimetry of the Dress showed significantly greater stimulation of blue cones (contrast = 73%) vs. red and green sensitive cones (contrast = 13%).

Conclusions: Our findings indicate that observers with denser MPOD may be predisposed to perceive the Dress as WG due to great absorption of blue light by the macular pigment. Moreover, the novel, substantial stimulation of blue cones by the Dress may contribute to ambiguity and dichotomous perception since the blue cones are so sparse in the retina. Finally, the delayed WG VEPs indicate distinct neural processing in perception of the consistent with fMRI evidence that the WG percept is processed at higher cortical levels than the BB. These results do not fully explain the dichotomous perception of the Dress but do exemplify the need to consider early stage processing when elucidating ambiguous percepts and figures.

Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1

The Dress as seen on the internet shown in A and the actual blue and black dress is shown in B. C shows an extracted image of the Dress consisting of vertical stripes of decreasing spatial frequency that was used in the present study to explore perception of the dress with limited contextual cues.

Fig 2. The colorimeter positioned over the 22" LCD display with magnified components of the Dress image.

The system measures luminance and CIE chromaticity.

Fig 3. Mean (±1 SE) MPOD is plotted for subjects who perceived the Dress to be white and gold (n = 17) or blue and black (n = 19).

The difference between means is significant (p < 0.04).

Fig 4. The VEP was digitized for each subject and averaged across all WG (n = 17) and BB subjects (n = 19).

The latency to the positive peak was significantly longer in the WG group (p = 0.0005).

Fig 5. The Dress as seen by a color vision normal observer, protanope, deuteranope and tritanope.

Lacking S cones has the greatest impact on dress color. See text for further details.

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Is the Dress Blue N Black or White N Gold

Source: https://pubmed.ncbi.nlm.nih.gov/27580077/

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