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Since the beginning of hand vein biometrics, the approaches to this problem have been countless, making this modality suitable for commercial use in some countries. This paper shows some of them and tries to show which are the most common procedures in each of the main stages of these systems. We will be able to see that the same database usage is not common along the literature, being the main problem...
The paper presents deriving of shape asymmetry measure in the dermatological sense (DASMShape). The skin lesion symmetry consists of three factors: shape, hue/color and structure. We analyze the shape asymmetry and on its basis we propose a new asymmetry degree realized in several ways. DASMShape methods verification and comparison is performed using PH2 database. The results received after optimization...
Designing a biometrie system based solely on skin texture is of interest because the face is sometimes oeeluded by hair or artefacts in many real-world contexts. This work presents a novel framework for the assessment of skin-based biometric systems incorporating skin quality information. The quality or purity of the extracted skin region is automatically established using pixel colour models prior...
Very few things in life are as certain as ageing. Although it is a definite and imminent process, it is neither uniform nor linear, and its pattern varies in different individuals. The pattern of facial ageing in each individual is linked with several intrinsic and extrinsic factors that may change the ageing pattern. Since sun exposure can be referred as the most important environmental factor influencing...
Presentation attack on the face recognition systems is well studied in the biometrics community resulting in various techniques for detecting the attacks. A low-cost presentation attack (e.g. print attacks) on face recognition systems has been demonstrated for systems operating in visible, multispectral (visible and near infrared spectrum) and extended multispectral (more than two spectral bands spanning...
Infantile hemangiomas (IH) are a type of benign vascular tumors that appear within the first 5 months of life. The assessment of lesion size and its evolution in time is done manually by the physician, using a ruler, and this measurement is not very accurate. This paper presents a method for automatic measurement of the IH size. The work is divided in two parts: automatic computation of the size of...
With the popularity of surveillance video, face detection in surveillance video has become a popular and important topic. Face detection in surveillance video plays an important role in many popular applications such as: personal identification, crowd analysis, database establishment, and abnormal event detection. This paper proposes an unconstrained face detection method for surveillance video, which...
Nowadays research has explored to extracting auxiliary information from various biometrie techniques such as fingerprints, face, iris, palm, voice etc. This information contains some features like gender, age, beard, mustache, scars, height, hair, skin color, glasses, weight, facial marks, tattoos etc. All this information contributes more and more to identification. The major changes that come across...
Face biometric systems are vulnerable to spoofing attacks. Such attacks can be performed in many ways, including presenting a falsified image, video or 3D mask of a valid user. A widely used approach for differentiating genuine faces from fake ones has been to capture their inherent differences in (2D or 3D) texture using local descriptors. One limitation of these methods is that they may fail if...
The precondition of productive data mining is having an efficient database to work on. The BioVid Emo DB is a multimodal database recorded for the purpose of analyzing human affective states and data mining related to emotion. Psychophysiological signals such as Skin Conductance Level, Electrocardiogram, Trapezius Electromyogram and also 4 video signals were recorded. 5 discrete emotions (amusement,...
Image-based estimation of skin lesions is efficient sub-field of medical imaging. The objective of task is to achieve more proper assessment of treatment effects. A significant group of skin lesion detection methods makes use of spatial relationships in order to deliver features for image region. Recently, a few study advances have been made in this particular group of area-based methods. This paper...
Dealing with a reliable face-ageing model has been an interesting topic with many envisioned applications such as those are related to investigation and forensics. Contrary to most previous works which deal with predictive face models, in this work, we propose a model that can estimate one’s appearance in his youth down to it being in the age of 3-4 years. In this proposed approach, the youth face...
With the development of face recognition technology, it is already being applied in various fields such as security and robotics. However, products associated with face recognition systems are difficult to commercialize because of the absence of evaluation methods that reflect the actual service environment. The best way to evaluate face recognition performance is evaluation by real people or methods...
Developing an automatic arabic sign language recognition system is of great importance, it can be used as a communication means between hearing-impaired and other people.
Face has been adopted as default biometric validation method and the International Standard Organization (ISO) proposed a standard which states constraints for facial image. This paper presents methods for evaluating face image conformance to the following ISO/ICAO requirements: pixelation, hair across eyes, veil over face and mouth opened. Each requirement is individually evaluated. The algorithm...
Biometric characteristics allow identifying an individual based on who they are. This paper focuses on using the face of a subject in electronic identity documents. The International Civil Aviation Organization (ICAO) has endorsed the adoption of the face as the globally interoperable biometric characteristic. Soon afterward, the International Standard Organization (ISO) proposed the ISO/IEC 19794-5...
The face has been used in identity documents and represents the ideal biometric characteristic in many applications. The International Civil Aviation Organization endorsed the use of face as the globally interoperable biometric characteristic. Successively, the International Standard Organization proposed the ISO/IEC 19794-5 standard for face usage in travel documents. The purpose of this work is...
This paper presents a database of human faces for persons wearing spectacles. The database consists of images of faces having significant variations with respect to illumination, head pose, skin color, facial expressions and sizes, and nature of spectacles. The database contains data of 60 subjects. This database is expected to be a precious resource for the development and evaluation of algorithms...
In this paper we present a framework for analyzing skin parameters from portrait images and videos. Using a series of Hierarchical Differential Image Filters (HDIF), it becomes possible to detect different skin features such as wrinkles, spots, and roughness. These detected features are used to compute skin ratings that are compared to actual ratings by dermatologists. Analyzing a database of 49 images...
We propose a geometrical method, applied over eye-specific features, to improve the accuracy of the art of eye-center localization. Our solution is built upon: (a) checking radially constrained gradient vectors, (b) adding weightage to iris specific features and (c) considering bi-directional image gradients to eliminate errors due to reflection on pupil. Our system outperforms the state of the art...
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