Personal identification based on both facial images and watermarking techniques in network environment

Author(s):  
M. Hashimoto ◽  
O. Nakamura
Mathematics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 4
Author(s):  
Mobeen Ahmad ◽  
Usman Cheema ◽  
Muhammad Abdullah ◽  
Seungbin Moon ◽  
Dongil Han

Applications for facial recognition have eased the process of personal identification. However, there are increasing concerns about the performance of these systems against the challenges of presentation attacks, spoofing, and disguises. One of the reasons for the lack of a robustness of facial recognition algorithms in these challenges is the limited amount of suitable training data. This lack of training data can be addressed by creating a database with the subjects having several disguises, but this is an expensive process. Another approach is to use generative adversarial networks to synthesize facial images with the required disguise add-ons. In this paper, we present a synthetic disguised face database for the training and evaluation of robust facial recognition algorithms. Furthermore, we present a methodology for generating synthetic facial images for the desired disguise add-ons. Cycle-consistency loss is used to generate facial images with disguises, e.g., fake beards, makeup, and glasses, from normal face images. Additionally, an automated filtering scheme is presented for automated data filtering from the synthesized faces. Finally, facial recognition experiments are performed on the proposed synthetic data to show the efficacy of the proposed methodology and the presented database. Training on the proposed database achieves an improvement in the rank-1 recognition rate (68.3%), over a model trained on the original nondisguised face images.


2021 ◽  
Vol 23 (1) ◽  
pp. 167-174
Author(s):  
Yu. Nizovtsev

With the proliferation of video surveillance systems and an increase in their quality, it is becoming increasingly important to identify suspects using these video recordings. Given the importance of wearing masks, due to quarantine requirements, identification by facial images is not always possible. The next element of an appearance, which is usually not covered by clothing, is the hands, namely their dorsum. At the same time, there are certain gaps in the methodological support of forensic examination of hand images. The article deals with certain problematic issues of scientific and methodological support as to forensic examination of images on the dorsum of the hands. Modern scientific developments in this area are indicated, namely guidelines: "Personal identification by photographic images of hands", subsection 2.1.3: "Examination of traces of the dorsum of the hand" taken from the textbook: "Forensic examinations in the procedural law of Ukraine" and a methodological manual which is now being developed at the Ukrainian Research Institute of Special Equipment and Forensic Science of the Security Service of Ukraine. The Expert specializations were analyzed for their compliance with the type of research under consideration. Based on the results of the analysis, it is concluded that the research of images on the dorsum of the hands now corresponds to several expert specializations at the same time. An opinion is also expressed about the imperfection of the modern system of expert specializations in Ukraine.


1990 ◽  
Author(s):  
Kazushige Takahashi ◽  
Tsuyoshi Sakaguchi ◽  
Toshi Minami ◽  
Osamu Nakamura

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