Combination of fast hybrid classification and k value optimization in k-nn for video face recognition

Nowadays, the need for face recognition is no longer include images only but also videos. However, there are some challenges associated with the addition of this new technique such as how to determine the right pre-processing, feature extraction, and classification methods to obtain excellent performance. Although nowadays the k-Nearest Neighbor (k-NN) is widely used, high computational costs due to numerous features of the dataset and large amount of training data makes adequate processing difficult. Several studies have been conducted to improve the performance of k-NN using the FHC (Fast Hybrid Classification) method by optimizing the local k values. One of the disadvantages of the FHC Method is that the k value used is still in the default form. Therefore, this research proposes the use of k-NN value optimization methods in FHC, thereby, increasing its accuracy. The Fast Hybrid Classification which combines the k-means clustering with k-NN, groups the training data into several prototypes called TLDS (Two Level Data Structure). Furthermore, two classification levels are applied to label test data, with the first used to determine the n number of prototypes with the same class in the test data. The second classification using the optimized k value in the k-NN method, is employed to sharpen the accuracy, when the same number of prototypes does not reach n. The evaluation results show that this method provides 86% accuracy and time performance of 3.3 seconds

Towards a Self-Sufficient Face Verification System

Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG[Abstract] The absence of a previous collaborative manual enrolment represents a significant handicap towards designing a face verification system for face re-identification purposes. In this scenario, the system must learn the target identity incrementally, using data from the video stream during the operational authentication phase. So, manual labelling cannot be assumed apart from the first few frames. On the other hand, even the most advanced methods trained on large-scale and unconstrained datasets suffer performance degradation when no adaptation to specific contexts is performed. This work proposes an adaptive face verification system, for the continuous re-identification of target identity, within the framework of incremental unsupervised learning. Our Dynamic Ensemble of SVM is capable of incorporating non-labelled information to improve the performance of any model, even when its initial performance is modest. The proposal uses the self-training approach and is compared against other classification techniques within this same approach. Results show promising behaviour in terms of both knowledge acquisition and impostor robustness.This work has received financial support from the Spanish government (project TIN2017-90135-R MINECO (FEDER)), from The Consellaría de Cultura, Educación e Ordenación Universitaria (accreditations 2016–2019, EDG431G/01 and ED431G/08), and reference competitive groups (2017–2020, and ED431C 2017/04), and from the European Regional Development Fund (ERDF). Eric López-López has received financial support from the Xunta de Galicia and the European Union (European Social Fund – ESF)Xunta de Galicia; EDG431G/01Xunta de Galicia; ED431G/08Xunta de Galicia; ED431C 2017/0

Pengembangan Media Pembelajaran Interaktif Berbasis Video Tutorial Di Sekolah Menengah Kejuruan

Abstract: The rapid exchange of information through multimedia throughout the world helps the growth of humans’ knowledge and, at the same time, requires redefinition of learning methods and media, especially in the field of vocational education. The purpose of this research was to develop an interactive learning media in the form of video tutorial in increasing the learning effectiveness in the subject of audio processing techniques at class XII in multimedia competence in one of the State Vocational Schools in Parepare. Research and Development method was used in this study. The stages of research included the planning, design and development stages. The subjects engaged in this research were two validators namely the experts of learning media and learning material, the students of class XII multimedia with the total of 18 persons, and one teacher who taught audio processing techniques. The results achieved in the development of interactive media showed that the developed video tutorial media had been valid based on the assessment of both learning media and learning material experts. The tests conducted on individuals, small group trials, and the subject teacher’s responses indicated that an interactive media in the form of video tutorial was effective and appropriate to the users’ needs.    Keywords: Research and development, Video Tutorial, Interactive media, Multimedia, Camtasia Studio  Abstrak: Pertukaran informasi yang cepat melalui multimedia di seluruh dunia membantu pertumbuhan pengetahuan manusia dan, pada saat yang sama, membutuhkan pendefinisian ulang metode dan media pembelajaran, terutama di bidang pendidikan kejuruan. Tujuan penelitian yaitu untuk mengembangkan media interaktif berupa video tutorial pembelajaran dalam meningkatkan efektivitas pembelajaran pada mata pelajaran teknik pengolahan audio kelas XII kompetensi keahlian multimedia di salah satu SMK Negeri di Parepare. Penelitian ini merupakan penelitian dan pengembangan (Research and Development). Tahapan penelitian meliputi tahap perencanaan, desain dan pengembangan. Subjek penelitian yang digunakan pada studi ini meliputi dua orang validator yaitu ahli media pembelajaran dan ahli materi pembelajaran, siswa kelas XII multimedia yang berjumlah 18 orang dan satu orang guru mata pelajaran teknik pengolahan audio. Hasil yang dicapai dalam pengembangan media interaktif menunjukkan media vidio tutorial yang dikembangkan telah valid berdasarkan penilaian dari ahli media pembelajaran dan ahli materi. Uji coba yang dilakukan kepada perorangan, uji coba kelompok kecil, dan tanggapan guru mata pelajaran menunjukkan bahwa media interaktif berupa video tutorial pembelajaran yang dihasilkan efektif dan sesuai kebutuhan pengguna.  Keywords: Pengembangan, Video tutorial, Media Interaktif, Multimedia, Camtasia Studi