FACIAL SOFT BIOMETRICS - Library of Ph.D. Theses | EURASIP

99Table 8.2: Comparison of existing access control systems, source:Trait Cost Accuracy Users SpeedFP $140 FRR = 1%, FAR=0.0001% 500 2sFace $320 >99.9% 100 < 1sPIN $15.99 100% 500 2sWe illustrate usability and presented system performance in terms of cost, accuracy, users andprocessing speed in Figure 8.8.Figure 8.8: Comparison of fingerprint (FP), face recognition and PIN based access control systems.8.4 SummaryWe presented a user study investigating the preference of a set of test participants on accessmethods, namely soft biometrics, face, PIN and fingerprint based access methods. This preferencewas evaluated generally in terms of usability measures, such as ease of use, intuitiveness and login-speed.Furthermore two scenarios were hereby assessed, specifically personal computer accessand entrance of a security lab in a crowded environment. The surprising outcome is that althoughall users were strongly biased towards the PIN based verification method, by daily using it, thebiometric based options were overall equally or even significantly better rated than the PIN basedsystem. Users appreciated the comfort, easiness and speed of modern technology. Specificallythey favored the soft biometrics system, due to the provided privacy preservation and ease of use.We demonstrated furthermore a broader comparison of existing access control systems, taking intoaccount the evaluated usability and moreover cost efficiency, processing speed and accuracy.