Title: Visual content summarisation for instructional videos using AdaBoost and SIFT

Authors: Zaynab El Khattabi; Youness Tabii; Abdelhamid Benkaddour

Addresses: LIROSA Laboratory, Faculty of Sciences, Abdelmalek Essaadi University, Tetuan, Morrocco ' LIROSA Laboratory, National School of Applied Sciences, Abdelmalek Essaadi University, Tetuan, Morrocco ' LIROSA Laboratory, Faculty of Sciences, Abdelmalek Essaadi University, Tetuan, Morrocco

Abstract: Research contributions in video retrieval field are rising to propose solutions for automatic understanding and retrieval of video content. The aim is to make the user able to retrieve specific video sequences in a large database, based on semantic information. In this paper, we process a special case of videos, instructional videos, where text presents very rich semantic information for understanding video content. Indeed, lecture videos are the source of information used in learning systems by educators and students for archiving and sharing knowledge. However, users usually have difficulties to access accurate parts in instructional videos. In our paper, we propose a method to summarise the visual content in instructional videos. For that, first, we segment the video into shots based on SIFT. Then, key frames which are rich in text and figures are extracted from each shot based on entropy measurement. These keyframes are classified using AdaBoost to eliminate non-text frames. The text content in the lecture video summary can be detected and recognised to identify keywords for indexing and classification.

Keywords: video summarisation; instructional videos; AdaBoost; SIFT; entropy.

DOI: 10.1504/IJKESDP.2019.103939

International Journal of Knowledge Engineering and Soft Data Paradigms, 2019 Vol.6 No.3/4, pp.207 - 218

Received: 03 Jul 2018
Accepted: 19 Jun 2019
Published online: 02 Dec 2019 *

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