Forthcoming articles


International Journal of Biometrics


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International Journal of Biometrics (6 papers in press)


Regular Issues


  • Fingerprint Indexing via BRIEF Minutia Descriptors   Order a copy of this article
    by Robert Pollak, Roland Richter 
    Abstract: We use BRIEF binary local image descriptors as minutia descriptors for indexing of biometric fingerprint databases. Tests with varying descriptor size and parametrization are performed on a proprietary database. Compared with the speed of an implementation of conventional minutiae matching, we find that BRIEF descriptors are fast enough for database indexing. The tested descriptors outperform two other image descriptors (LBP, HoG) from recent literature with respect to matching rates and average penetration rates.
    Keywords: biometrics; fingerprints; indexing; BRIEF; image descriptors.

  • Mutually Reinforcing Motion-Pose Framework for Pose Invariant Action Recognition   Order a copy of this article
    by Manoj Ramanathan, Wei-Yun Yau, Nadia Magnenat Thalmann, Eam Khwang Teoh 
    Abstract: Action recognition from videos has many potential applications. However, there are many unresolved challenges, such as pose-invariant recognition, robustness to occlusion and others. In this paper, we propose to combine two most important characteristics of an action, motion of body parts and specific canonical poses observed in a novel mutually reinforcing framework to achieve pose-invariant action recognition. The proposed framework consists of two components. The first component is the pose-invariant feature extraction that captures the motion of body parts needed for action recognition. This forms the forward propagation motion path of our framework that recognizes an initial action using the extracted features. Each action is characterized by specific canonical stick poses. Given the training videos of an action, we propose an algorithm to extract a dictionary of normalized canonical stick poses. The second component of the framework is the pose hypothesis generation scheme that compares each of the extracted canonical sticks of the initial action recognized with the video frame to identify the most likely canonical stick pose. We use the identified canonical stick pose in the frame to improve the pose-invariant motion feature extraction. To capture the temporal dynamics of an action, we introduce temporal stick features computed using the stick poses obtained. This pose-based component acts as the feedback path in our framework. The combination of pose-invariant kinematic features from the forward and feedback paths together with the temporal stick features are used to recognize the action, thus forming a mutually reinforcing framework that repeats until the action recognition result converges. The proposed mutual reinforcement framework is capable of handling changes in posture of the person, occlusion and partial view-invariance. We perform experiments on several benchmark datasets which showed the performance of the proposed algorithm and its ability to handle pose variation and occlusion.
    Keywords: Action recognition; pose-invariant motion feature; canonical stick poses; mutual reinforcement framework.

  • An Overlap based Human Gait Cycle Detection   Order a copy of this article
    by Sugandhi K., FARHA FATINA WAHID, Nikesh P, Raju G 
    Abstract: Identification of a person by his/her style of walking is referred as gait recognition. Gait is one among the biometric used for Human identification. In gait recognition, an inevitable step for accurate feature extraction is gait cycle detection. In this paper, a novel gait cycle detection algorithm based on the concept of overlap between legs during locomotion is proposed. To identify overlap, zero-crossing counts of silhouette frames as well as bottom halves of silhouette frames are considered. The efficiency of this algorithm is tested using normal walking sequence of subjects with 900 viewing angle from CASIA B as well as TUM-IITKGP human gait databases. The results obtained shows that gait cycle can be easily and efficiently detected with zero-crossing count of silhouette frames. Further zero-crossing counts taken from bottom halves of silhouette frames gives better performance.
    Keywords: Gait; Gait cycle; Overlap; silhouette; zero-crossing.

  • Orthogonal rotation invariant features for iris and periocular recognition   Order a copy of this article
    by Bineet Kaur, Sukhwinder Singh, Jagdish Kumar 
    Abstract: In a non-ideal scenario iris recognition becomes challenging due to occlusion noise by eyelashes and eyelids, specular reflections and illumination variations. This limits its applicability to be used in real-time applications. Thus, periocular recognition is used in complementary to iris recognition which refers to the region around eyes including eyelashes, eyelids and skin texture. By fusing both iris and periocular modalities, a more reliable and an accurate biometric system is attained that can be considered for high surveillance applications. The proposed techniques are based on continuous orthogonal moments: Zernike moments and Polar harmonic transforms which are invariant to rotation and noise. These capture local intensity variations of the neighborhood pixels that pertain to shape details of the periocular region and random texture pattern of the iris region. The techniques have been evaluated on iris databases: IITD.v1 and UBIRIS.v2 and a self-developed PEC, Chandigarh periocular database which has been created in a less constrained environment for the research community working on periocular recognition. Results demonstrate that the proposed technique gives encouraging results in comparison to the existing approaches.
    Keywords: Biometrics; Iris Recognition; Orthogonal Moments; Periocular Recognition; Polar Complex Exponential Transform; Polar Cosine Transform; Polar Harmonic Transform; Polar Sine Transform; Zernike Moments.

  • Fake Fingerprint Liveness Detection Based on Micro and Macro Features   Order a copy of this article
    by Rohit Agarwal, Anand Singh Singh 
    Abstract: Finger print is the most hopeful biometric authentication that can specifically identify a person from their exclusive features. To make sure the difference between a real trait with a fake one constructed from dissimilar fabrication or reconstructed sample is a noteworthy hitch in fingerprint authentication. To keep an excellent point of protection, consistent spoofing detection tools are essential, preferably implemented as software modules. In the proposed approach, a novel software-based classification method is presented that can be used in fake fingerprint detection system to classify between fake and real one. The intention of the proposed system is to improve the security of biometric identification system, by accumulation liveness measurement in a rapid, comprehensible manner. For illustration while the statistical techniques are good for micro features but not well for macro. In this paper, we present a novel combination of local Haralick micro texture features with macro features derived from Neighborhood Gray-Tone Difference Matrix (NGTDM) to generate feature vector for training and testing fingerprint images. Combined extracted features of training and testing images are passed to Support Vector Machine for discriminating live and fake fingerprints. The proposed approach is experimented and validated on ATVS dataset and LivDet2011 dataset. The proposed approach has achieved good accuracy and very less error rate in comparison to the different previously studied techniques.
    Keywords: Biometrics; Fingerprints; Liveness; Spoof; micro features; macro features;.

  • Real-Time Single-View Face Detection and Face Recognition based on Aggregate Channel Feature   Order a copy of this article
    by Michael George, Aswathy Sivan, Babita Roslind Jose, Jimson Mathew 
    Abstract: A single-view face detector and a novel face recognition method based on the Aggregate Channel Feature (ACF) that work at real-time speeds, suitable in a computing resource-constrained setting are presented in this work. The four stage tree based face detector is trained on a subset of the AFLW dataset. The face detection performance is analysed using the AFW dataset. The face recogniser uses ACF features along with classification algorithms, either SVM or MLP. The face recogniser is trained and tested on the GATech Face dataset. Our face detector displays comparable performance against the state of the art while working at 29.8 fps. The face recogniser achieves a level of performance that is competitive with other state of the art works. The effect of PCA based dimension reduction of ACF features on face recognition performance is also studied in this work.
    Keywords: ACF; SVM; MLP; Face Recognition; Face Detection.