scholarly journals The effect of homeomorphic image transformations on face matching performance

2010 ◽  
Vol 8 (6) ◽  
pp. 964-964
Author(s):  
D. A. Wilbraham ◽  
J. C. Christensen ◽  
J. T. Todd ◽  
A. M. Martinez
Keyword(s):  
Face Matching ◽  
Matching Performance ◽  
Homeomorphic Image ◽  
Image Transformations

scholarly journals Human face matching performance is robust to task-irrelevant image changes

2010 ◽  
Vol 7 (9) ◽  
pp. 890-890
Author(s):  
D. Wilbraham ◽  
A. Martinez ◽  
J. Christensen ◽  
J. Todd
Keyword(s):  
Human Face ◽  
Face Matching ◽  
Matching Performance ◽  
Task Irrelevant

scholarly journals A grey area: How does image hue affect unfamiliar face matching?

2018 ◽  
Author(s):  
Anna K Bobak ◽  
Viktoria Roumenova Mileva ◽  
Peter Hancock
Keyword(s):  
Matching Task ◽  
Mixed Condition ◽  
Face Matching ◽  
Matching Test ◽  
Unfamiliar Face Matching ◽  
Unfamiliar Face ◽  
Matching Performance ◽  
Small Decline ◽  
Clear Shift

The role of image colour in face identification has received little attention in research despite the importance of identifying people from photographs in identity documents (IDs). Here, in two experiments, we investigated whether colour congruency of two photographs shown side by side affects face matching accuracy. Participants were presented with two images from the Models Face Matching Test (Experiment 1) and a newly devised matching task incorporating female faces (Experiment 2) and asked to decide whether they show the same person, or two different people. The photographs were either both in colour, both in grayscale, or mixed (one in grayscale and one in colour). Participants were more likely to accept a pair of images as a “match”, i.e. same person, in the mixed condition, regardless of whether the identity of the pair was the same or not. This demonstrates a clear shift in bias between “congruent” colour conditions and the mixed trials. In addition, there was a small decline in accuracy in the mixed condition, relative to when the images were presented in colour. Our study provides the first evidence that the hue of document photographs matters for face matching performance. This finding has important implications for the design and regulation of photographic ID worldwide.

scholarly journals Surgical face masks impair human face matching performance for familiar and unfamiliar faces

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Daniel J. Carragher ◽  
Peter J. B. Hancock
Keyword(s):  
Face Recognition ◽  
Recognition System ◽  
Human Face ◽  
Face Matching ◽  
Face Recognition System ◽  
Surgical Masks ◽  
The Face ◽  
Matching Performance ◽  
Recognition Systems ◽  
Unfamiliar Faces

AbstractIn response to the COVID-19 pandemic, many governments around the world now recommend, or require, that their citizens cover the lower half of their face in public. Consequently, many people now wear surgical face masks in public. We investigated whether surgical face masks affected the performance of human observers, and a state-of-the-art face recognition system, on tasks of perceptual face matching. Participants judged whether two simultaneously presented face photographs showed the same person or two different people. We superimposed images of surgical masks over the faces, creating three different mask conditions: control (no masks), mixed (one face wearing a mask), and masked (both faces wearing masks). We found that surgical face masks have a large detrimental effect on human face matching performance, and that the degree of impairment is the same regardless of whether one or both faces in each pair are masked. Surprisingly, this impairment is similar in size for both familiar and unfamiliar faces. When matching masked faces, human observers are biased to reject unfamiliar faces as “mismatches” and to accept familiar faces as “matches”. Finally, the face recognition system showed very high classification accuracy for control and masked stimuli, even though it had not been trained to recognise masked faces. However, accuracy fell markedly when one face was masked and the other was not. Our findings demonstrate that surgical face masks impair the ability of humans, and naïve face recognition systems, to perform perceptual face matching tasks. Identification decisions for masked faces should be treated with caution.

scholarly journals Redesigning photo-ID to improve unfamiliar face matching performance.

2014 ◽  
Vol 20 (2) ◽  
pp. 166-173 ◽  
Author(s):  
David White ◽  
A. Mike Burton ◽  
Rob Jenkins ◽  
Richard I. Kemp
Keyword(s):  
Face Matching ◽  
Unfamiliar Face Matching ◽  
Unfamiliar Face ◽  
Matching Performance

scholarly journals Individual Differences Between Observers in Face Matching

2020 ◽  
Author(s):  
Sarah Bate ◽  
Natalie Mestry ◽  
Emma Portch
Keyword(s):  
Individual Differences ◽  
Real World ◽  
Face Processing ◽  
Assessment Tools ◽  
Current Evidence ◽  
Face Matching ◽  
Standard Assessment ◽  
Assessment Tasks ◽  
Matching Performance ◽  
Current Terminology

Increasing evidence suggests vast individual differences in face matching performance in both lay perceivers and relevant professionals. However, the field is hampered by a paucity of psychometric-standard assessment tasks. This chapter reviews the current evidence supporting individual differences in face matching, in light of the reliability of the available tools. The potential underpinnings of these individual differences are reviewed, alongside the overlap between different continua of face-processing skills. Given so-called ‘super-recognisers’ may offer a powerful security tool in relevant settings, the identification and deployment of these individuals are critically discussed. In particular, the reliability and appropriateness of current terminology and assessment tools are considered, together with potential limitations in the performance of even the strongest face matchers. While the current conceptualisation of super-recognition can no doubt advance academic theory, this approach may not adequately identify the best individuals for real-world forensic face matching tasks.

scholarly journals Masked face identification is improved by diagnostic feature training

2021 ◽  
Author(s):  
Daniel James Carragher ◽  
Alice Towler ◽  
Viktoria Roumenova Mileva ◽  
David White ◽  
Peter Hancock
Keyword(s):  
Effective Means ◽  
Professional Staff ◽  
Matching Task ◽  
Face Identification ◽  
Diagnostic Feature ◽  
Facial Features ◽  
Training Method ◽  
The Public ◽  
Face Matching ◽  
Matching Performance

To slow the spread of COVID-19, many people now wear face masks in public. Face masks impair our ability to identify faces, which can cause problems for professional staff who must identify offenders and members of the public. Here, we investigate whether performance on a masked face matching task can be improved by training participants to compare diagnostic facial features (the ears and facial marks) – a validated training method that improves matching performance for unmasked faces. We find strong evidence this brief diagnostic feature training, which takes less than two minutes to complete, improves matching performance for masked faces by approximately 5%. A control training course, which was unrelated to face identification, had no effect on matching performance. Our findings demonstrate that comparing the ears and facial marks is an effective means of improving face matching performance for masked faces. These findings have implications for professions that regularly perform face identification.

EXPRESS: Distinct abilities associated with matching same identity faces vs. discriminating different faces: Evidence from individual differences in prosopagnosics and controls

2022 ◽  
pp. 174702182210768
Author(s):  
Amy Berger ◽  
Regan Fry ◽  
Anna Bobak ◽  
Angela Juliano ◽  
Joseph DeGutis
Keyword(s):  
Individual Differences ◽  
Holistic Processing ◽  
Small Study ◽  
Entire Group ◽  
Face Images ◽  
Face Matching ◽  
Processing Ability ◽  
Processing Abilities ◽  
Matching Performance ◽  
Featural Processing

Previous face matching studies provide evidence that matching same identity faces (match trials) and discriminating different face identities (non-match trials) rely on distinct processes. For example, instructional studies geared towards improving face matching in applied settings have often found selective improvements in match or non-match trials only. Additionally, a small study found that developmental prosopagnosics (DPs) have specific deficits in making match but not non-match judgments. In the current study, we sought to replicate this finding in DPs and examine how individual differences across DPs and controls in match vs. non-match performance relate to featural vs. holistic processing abilities. 43 DPs and 27 controls matched face images shown from similar front views or with varied lighting or viewpoint. Participants also performed tasks measuring featural (eyes/mouth) and holistic processing (part-whole task). We found that DPs showed worse overall matching performance than controls and that their relative match vs. non-match deficit depended on image variation condition, indicating that DPs do not consistently show match- or non-match-specific deficits. When examining the association between holistic and featural processing abilities and match vs. non-match trials in the entire group of DPs and controls, we found a very clear dissociation: Match trials significantly correlated with eye processing ability (r=.48) but not holistic processing (r=.11), whereas non-match trials significantly correlated with holistic processing (r=.32) but not eye processing (r=.03). This suggests that matching same identity faces relies more on eye processing while discriminating different faces relies more on holistic processing.

Exploring Levels of Face Familiarity by Using an Indirect Face-Matching Measure

Perception ◽  
10.1068/p3335 ◽  
2002 ◽  
Vol 31 (8) ◽  
pp. 985-994 ◽  
Author(s):  
Ruth Clutterbuck ◽  
Robert A Johnston
Keyword(s):  
Face Processing ◽  
Matching Task ◽  
Indirect Measure ◽  
Face Matching ◽  
External Feature ◽  
Unfamiliar Face ◽  
Matching Performance ◽  
Unfamiliar Faces

An experiment is reported in which participants matched complete images of unfamiliar, moderately familiar, and highly familiar faces with simultaneously presented images of internal and external features. Participants had to decide if the two images depicted same or different individuals. Matches to internal features were made faster to highly familiar faces than both to moderately familiar and to unfamiliar faces, and matches to moderately familiar faces were made faster than to unfamiliar faces. For external feature matches, this advantage was only found for “different” decision matches to highly familiar faces compared to unfamiliar faces. The results indicate that the differences in familiar and unfamiliar face processing are not the result of all-or-none effects, but seem to have a graded impact on matching performance. These findings extend the earlier work of Young et al (1985 Perception14 737–746), and we discuss the possibility of using the matching task as an indirect measure of face familiarity.

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