Investigation of the Effect of Face Regions on Local Shape Descriptor Based 3D Face Recognition

Halıcı, Uğur
In this study, the effect of face regions on local shape descriptor based 3D face recognition was investigated. Our approach starts with calculation of the SIFT descriptors on the shape maps of the 3D faces. In the next phase, SIFT descriptors in the selected regions are concatenated to form feature vectors. Then these feature vectors are fed into linear discriminant analysis (LDA) for face recognition. In this study, faces are segmented into 47 regions and the descriptors in one or more regions are concatenated and their effect on face recognition was investigated. Face recognition tests were conducted by using the FRGC v2.0 face database.


3D face recognition with local shape descriptors
İnan, Tolga; Halıcı, Uğur; Department of Electrical and Electronics Engineering (2011)
This thesis represents two approaches for three dimensional face recognition. In the first approach, a generic face model is fitted to human face. Local shape descriptors are located on the nodes of generic model mesh. Discriminative local shape descriptors on the nodes are selected and fed as input into the face recognition system. In the second approach, local shape descriptors which are uniformly distributed across the face are calculated. Among the calculated shape descriptors that are discriminative fo...
Robust extraction of sparse 3d points from image sequences
Vural, Elif; Alatan, Abdullah Aydın; Department of Electrical and Electronics Engineering (2008)
In this thesis, the extraction of sparse 3D points from calibrated image sequences is studied. The presented method for sparse 3D reconstruction is examined in two steps, where the first part addresses the problem of two-view reconstruction, and the second part is the extension of the two-view reconstruction algorithm to include multiple views. The examined two-view reconstruction method consists of some basic building blocks, such as feature detection and matching, epipolar geometry estimation, and the rec...
Modeling of asymmetric intermodulation distortion and memory effects of power amplifiers
Yüzer, Ahmet Hayrettin; Demir, Şimşek; Department of Electrical and Electronics Engineering (2011)
This dissertation is focused on developing a new passband behavioral model in order to account for asymmetric intermodulation distortion resulted from memory effect. First, a measurement setup is prepared to measure the AM/AM, AM/PM distortion, magnitudes and the phases of intermodulation (IMD) and fundamental (FUND) components which are created by the amplifier where phase is calculated only by measuring magnitudes. Then, responses of a sample amplifier are measured for different excitation situations (cen...
Biomechanical modelling of the interphalangeal joints of the human hand
Yatağan, Koray Melih; Tönük, Ergin; Leblebicioğlu, Gürsel; Department of Mechanical Engineering (2021-7-15)
In this study, the development process of a 3D unconstrained model of the interphalangeal (IP) joints is presented. The model agrees with the experimental studies. It can explain the change in the axis of the IP joints, the non-linear relationship between the tendon excursion and the flexion angle, the coordination between the IP joints and the tendon forces corresponding to the flexion angle. Furthermore, some controversial topics in the literature are investigated using the model, and four theses are deve...
Investigation of fracture behavior of steel/steel laminates
Şimşir, Mehmet; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2004)
A study is carried out into fracture behavior of steel/steel laminates both experimentally and through finite element analysis (FEM). The laminates produced by hot pressing consisted of low carbon and medium carbon steels with two volume fractions; 0.41 and 0.81. Fracture toughness, JIC has been measured using partial unloading technique assuming a critical value of crack extension. The technique is initially applied to monolithic material and then to the laminates in crack divider orientation. Evaluation o...
Citation Formats
T. İNAN and U. Halıcı, “Investigation of the Effect of Face Regions on Local Shape Descriptor Based 3D Face Recognition,” 2013, Accessed: 00, 2020. [Online]. Available: