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In automatic face recognition the quality of the input image directly affects the accuracy of face identification and verification. In this work the authors presented a novel method for non-reference biometric evaluation of face image quality based on the analysis of cosine similarity between feature vectors extracted by a neural network recognition model. Unlike general image quality assessment methods like BRISQUE, the proposed approach utilizes both the distance to the class center and the degree of proximity to the most similar external classes, which allows more accurate ranking of images according to their suitability for biometric tasks. By using the AUC metric at different FMR levels, the experiments results on five common datasets (LFW, CALFW, AgeDB-30, CFP-FP, CPLFW) have demonstrated the advantage of the proposed method over modern approaches (CR-FIQA, SDD-FIQA, TOPIQ, etc.), thus it a promising technique for integration into practical biometric systems.
Viktor Bordiuzha
National Research University of Electronic Technology, Russia, 124498, Moscow, Zelenograd, Shokin sq., 1
Sergey V. Umnyashkin
National Research University of Electronic Technology, Russia, 124498, Moscow, Zelenograd, Shokin sq., 1

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